Table Of Contents

ignore-lsp-errors

interface ctunnel

ip domain-lookup nsap

isis adjacency-filter

iso-igrp adjacency-filter

log-adjacency-changes (ISO CLNS)

lsp-mtu (ISO CLNS)

match clns address

match clns next-hop

match clns route-source

match interface (ISO CLNS)

match metric (ISO CLNS)

match route-type (ISO CLNS)

metric weights (ISO CLNS)

redistribute (ISO CLNS)

route-map (ISO CLNS)

router iso-igrp

set level (ISO CLNS)

set metric (ISO CLNS)

set metric-type (ISO CLNS)

set tag (ISO CLNS)

show clns

show clns cache

show clns es-neighbors

show clns filter-expr

show clns filter-set

show clns interface

show clns is-neighbors

show clns neighbor areas

show clns neighbors

show clns protocol

show clns route

show clns traffic

show isis routes

show route-map

show tarp

show tarp blacklisted-adjacencies

ignore-lsp-errors

To allow the router to ignore Intermediate System-to-Intermediate System (IS-IS) link-state packets that are received with internal checksum errors rather than purging the link-state packets, use the ignore-lsp-errors command in router configuration mode. To disable this function, use the no form of this command.

ignore-lsp-errors

no ignore-lsp-errors

Syntax Description

This command has no arguments or keywords.

Defaults

This command is enabled by default; that is, corrupted LSPs are dropped instead of purged for network stability.

Command Modes

Router configuration

Command History

Release	Modification
11.1	This command was introduced.
12.0	This command is now enabled by default.

Usage Guidelines

The IS-IS protocol definition requires that a received link-state packet with an incorrect data-link checksum be purged by the receiver, which causes the initiator of the packet to regenerate it. However, if a network has a link that causes data corruption while still delivering link-state packets with correct data link checksums, a continuous cycle of purging and regenerating large numbers of packets can occur. Because this could render the network nonfunctional, use the ignore-lsp-errors command to ignore these link-state packets rather than purge the packets.

Link-state packets are used by the receiving routers to maintain their routing tables.

If you want to explicitly purge the corrupted LSPs, issue the no ignore-lsp-errors command.

Examples

The following example instructs the router to ignore link-state packets that have internal checksum errors:

router isis

 ignore-lsp-errors

interface ctunnel

To create a virtual interface to transport IP over a CLNS tunnel (CTunnel), use the interface ctunnel command in global configuration mode. To remove the virtual interface, use the no form of this command.

interface ctunnel interface-number

no interface ctunnel interface-number

Syntax Description

interface-number

CTunnel interface number (a number from 0 through 2,147,483,647).

Defaults

No default behavior or values.

Command Modes

Global configuration

Command History

Release	Modification
12.1(5)T	This command was introduced.

Usage Guidelines

When configuring an IP over CLNS tunnel, you must first create a virtual interface. In the following example, the interface ctunnel command is used to create the virtual interface.

Examples

The following example configures a CTunnel from one router to another and shows the CTunnel destination set to 49.0001.1111.1111.1111.00:

interface ctunnel 301

 ip address 10.0.0.3 255.255.255.0

 ctunnel destination 49.0001.1111.1111.1111.00

Related Commands

Command	Description
clns routing	Enables routing of CLNS packets.
ctunnel destination	Configures the destination parameter for a CLNS tunnel.
debug ctunnel	Displays debug messages for the IP over a CLNS Tunnel feature.
ip address	Sets a primary or secondary IP address for an interface.
ip routing	Enables IP routing.

ip domain-lookup nsap

To allow Domain Name System (DNS) queries for CLNS addresses, use the ip domain-lookup nsap command in global configuration mode. To disable this function, use the no form of this command.

ip domain-lookup nsap

no ip domain-lookup nsap

Syntax Description

This command has no arguments or keywords.

Defaults

Enabled

Command Modes

Global configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

With both IP and ISO CLNS enabled on a router, this feature allows you to discover a CLNS address without having to specify a full CLNS address given a host name. This feature is useful for the ISO CLNS ping EXEC command and when making CLNS Telnet connections.

Examples

The following example disables DNS queries of CLNS addresses:

no ip domain-lookup nsap

Related Commands

Command	Description
ip domain-lookup	Enables the IP DNS-based host name-to-address translation.
ping (privileged)	Diagnoses basic network connectivity on Apollo, AppleTalk, CLNS, DECnet, IP, Novell IPX, VINES, or XNS networks.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.

isis adjacency-filter

To filter the establishment of Intermediate System-to-Intermediate System (IS-IS) adjacencies, use the isis adjacency-filter command in interface configuration mode. To disable filtering of the establishment of IS-IS adjacencies, use the no form of this command.

isis adjacency-filter name [match-all]

no isis adjacency-filter name [match-all]

Syntax Description

name	Name of the filter set or expression to apply.
match-all	(Optional) All NSAP addresses must match the filter in order to accept the adjacency. If not specified (the default), only one address need match the filter in order for the adjacency to be accepted.

Defaults

Disabled

Command Modes

Interface configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Filtering is performed by building NSAP addresses out of incoming IS-IS hello packets by combining each area address in the hello with the system ID. Each of these NSAP addresses is then passed through the filter. If any one NSAP matches, the filter is considered "passed," unless the match-all keyword was specified, in which case all addresses must pass. The functionality of the match-all keyword is useful in performing "negative tests," such as accepting an adjacency only if a particular address is not present.

Filtering is performed on full NSAP addresses. If filtering should only be performed on system IDs, or any other substring of the full NSAP address, the wildcard matching capabilities of filter sets should be used to ignore the insignificant portions of the NSAP addresses.

Filter sets and expressions are described in this manual in the descriptions for the clns filter-expr, clns filter-set, and clns template-alias global configuration commands.

Examples

The following example builds a filter that accepts adjacencies with only two systems, based only on their system IDs:

clns filter-set ourfriends ...0000.0c00.1234.**

clns filter-set ourfriends ...0000.0c00.125a.**

!

interface ethernet 0

 isis adjacency-filter ourfriends

Related Commands

Command	Description
clns adjacency-filter	Filters the establishment of CLNS ES and IS adjacencies.
clns filter-expr	Combines CLNS filter sets and CLNS address templates to create complex logical NSAP pattern-matching expressions.
clns filter-set	Builds a list of CLNS address templates with associated permit and deny conditions for use in CLNS filter expressions.
clns template-alias	Builds a list of alphanumeric aliases of CLNS address templates for use in the definition of CLNS filter sets.
iso-igrp adjacency-filter	Filters the establishment of ISO IGRP adjacencies.

iso-igrp adjacency-filter

To filter the establishment of ISO IGRP adjacencies, use the iso-igrp adjacency-filter command in interface configuration mode. To disable filtering of the establishment of ISO IGRP adjacencies, use the no form of this command.

iso-igrp adjacency-filter name

no iso-igrp adjacency-filter name

Syntax Description

name	Name of the filter set or expression to apply.

Defaults

Disabled

Command Modes

Interface configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Filtering is performed on full NSAP addresses. If filtering should only be performed on system IDs, or any other substring of the full NSAP address, the wildcard matching capabilities of filter sets should be used to ignore the insignificant portions of the NSAP addresses.

For descriptions of filter sets and expressions, refer to the clns filter-expr, clns filter-set, and clns template-alias global configuration commands in this chapter.

Examples

The following example builds a filter that accepts adjacencies with only two systems, based only on their system IDs:

clns filter-set ourfriends ...0000.0c00.1234.**

clns filter-set ourfriends ...0000.0c00.125a.**

!

interface ethernet 0

 iso-igrp adjacency-filter ourfriends

Related Commands

Command	Description
clns adjacency-filter	Filters the establishment of CLNS ES and IS adjacencies.
clns filter-expr	Combines CLNS filter sets and CLNS address templates to create complex logical NSAP pattern-matching expressions.
clns filter-set	Builds a list of CLNS address templates with associated permit and deny conditions for use in CLNS filter expressions.
clns template-alias	Builds a list of alphanumeric aliases of CLNS address templates for use in the definition of CLNS filter sets.
isis adjacency-filter	Filters the establishment of IS-IS adjacencies.

log-adjacency-changes (ISO CLNS)

To cause Intermediate System-to-Intermediate System (IS-IS) to generate a log message when an Netware Link Services Protocol (NLSP) IS-IS adjacency changes state (up or down), use the log-adjacency-changes command in router configuration mode. To disable this function, use the no form of this command.

log-adjacency-changes

no log-adjacency-changes

Syntax Description

This command has no arguments or keywords.

Defaults

Does not log adjacency changes

Command Modes

Router configuration

Command History

Release	Modification
11.1	This command was introduced.

Usage Guidelines

This command allows the monitoring of IS-IS adjacency state changes. This may be very useful when monitoring large networks. Messages are logged using the system error message facility. Messages are of the form:

%CLNS-5-ADJCHANGE: ISIS: Adjacency to 0000.0000.0034 (Serial0) Up, new adjacency

%CLNS-5-ADJCHANGE: ISIS: Adjacency to 0000.0000.0034 (Serial0) Down, hold time expired

Examples

The following example instructs the router to log adjacency changes:

router isis

 log-adjacency-changes

Related Commands

Command	Description
logging	Logs messages to a syslog server host.

lsp-mtu (ISO CLNS)

To set the maximum transmission unit (MTU) size of Intermediate System-to-Intermediate System (IS-IS) link-state packets (LSPs), use the lsp-mtu command in router configuration mode. To disable this function, use the no form of this command.

lsp-mtu size

no lsp-mtu

Syntax Description

size	Maximum packet size in bytes. The size must be less than or equal to the smallest MTU of any link in the network. The default size is 1497 bytes.

Defaults

1497 bytes

Command Modes

Router configuration

Command History

Release	Modification
10.3	This command was introduced.

Usage Guidelines

Under normal conditions, the default MTU size should be sufficient. However, if the MTU of a link is below 1500 bytes, the link-state packet MTU must be lowered accordingly on each router in the network. If this is not done, routing becomes unpredictable.

---

Note This rule applies for all routers in a network. If any link in the network has a reduced MTU, all routers must be changed, not just the routers directly connected to the link.

---

---

Caution The CLNS MTU of a link (which is the applicable value for IS-IS, even if it is being used to route IP) may differ from the IP MTU. To be certain about a link MTU as it pertains to IS-IS, use the show clns interface command to display the value.

---

Examples

The following example sets the MTU size to 1300 bytes:

router isis

 lsp-mtu 1300

Related Commands

Command	Description
clns mtu	Sets the MTU packet size for the interface.
mtu	Adjusts the maximum packet size or MTU size.

match clns address

To define the match criterion, use the match clns address command in route-map configuration mode. Routes that have a network address matching one or more of the names—and that satisfy all other defined match criteria—will be redistributed. To remove the match criterion, use the no form of this command.

match clns address name [name...name]

no match clns address name [name...name]

Syntax Description

name	Name of a standard access list, filter set, or expression.

Defaults

Disabled

Command Modes

Route-map configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the route-map global configuration command, and the route-map configuration commands match and set, to define the conditions for redistributing routes from one routing protocol into another. Each route-map command has a list of match and set commands associated with it. The match commands specify the match criteria—the conditions under which redistribution is allowed for the current route-map command. The set commands specify the set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met. The no route-map command deletes the route map.

The match route-map configuration command has multiple formats. The match commands may be given in any order, and all defined match criteria must be satisfied to cause the route to be redistributed according to the set actions given with the set commands. The no forms of the match commands remove the specified match criteria.

Examples

In the following configuration, an ISO IGRP-learned route with a prefix 49.0001.0002 will be redistributed if it satisfies the CLNS address matching criterion:

router isis

 redistribute iso-igrp remote route-map ourmap

route-map ourmap permit

 match clns address ourprefix

 clns filter-set ourprefix permit 49.0001.0002...

Related Commands

Command	Description
match clns next-hop	Defines the next-hop match criterion.
match clns route-source	Defines the route-source match criterion.
match interface (ISO CLNS)	Defines the interface match criterion.
match metric (ISO CLNS)	Defines the metric match criterion.
match route-type (ISO CLNS)	Defines the route-type match criterion.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.
set level (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric (ISO CLNS)	Sets the metric value to give the redistributed routes.
set metric-type (ISO CLNS)	Sets the metric type to give redistributed routes.
set tag (ISO CLNS)	Sets a tag value to associate with the redistributed routes.

match clns next-hop

To define the next-hop match criterion, use the match clns next-hop command in route-map configuration mode. Routes that have a next-hop router address matching one of the names—and that satisfy all other defined match criteria—will be redistributed. To remove the match criterion, use the no form of this command.

match clns next-hop name [name...name]

no match clns next-hop name [name...name]

Syntax Description

name	Name of an access list, filter set, or expression.

Defaults

Disabled

Command Modes

Route-map configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the route-map global configuration command, and the route-map configuration commands match and set, to define the conditions for redistributing routes from one routing protocol into another. Each route-map command has a list of match and set commands associated with it. The match commands specify the match criteria—the conditions under which redistribution is allowed for the current route-map command. The set commands specify the set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met. The no route-map command deletes the route map.

The match route-map configuration command has multiple formats. The match commands may be given in any order, and all defined match criteria must be satisfied to cause the route to be redistributed according to the set actions given with the set commands. The no forms of the match commands remove the specified match criteria.

Examples

In the following configuration, an ISO IGRP-learned route with a prefix 49.0001.0002 will be redistributed if it satisfies the CLNS next-hop matching criterion:

router isis

 redistribute iso-igrp remote route-map ourmap

route-map ourmap permit

 match clns next-hop ourprefix

 clns filter-set ourprefix permit 49.0001.0002...

Related Commands

Command	Description
match clns address	Defines the match criterion.
match clns route-source	Defines the route-source match criterion.
match interface (ISO CLNS)	Defines the interface match criterion.
match metric (ISO CLNS)	Defines the metric match criterion.
match route-type (ISO CLNS)	Defines the route-type match criterion.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.
set level (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric (ISO CLNS)	Sets the metric value to give the redistributed routes.
set metric-type (ISO CLNS)	Sets the metric type to give redistributed routes.
set tag (ISO CLNS)	Sets a tag value to associate with the redistributed routes.

match clns route-source

To define the route-source match criterion, use the match clns route-source command in route-map configuration mode. Routes that have been advertised by routers at the address specified by the name—and that satisfy all other defined match criteria—will be redistributed. To remove the specified match criterion, use the no form of this command.

match clns route-source name [name...name]

no match clns route-source name [name...name]

Syntax Description

name	Name of access list, filter set, or expression.

Defaults

Disabled

Command Modes

Route-map configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the route-map global configuration command, and the route-map configuration commands match and set, to define the conditions for redistributing routes from one routing protocol into another. Each route-map command has a list of match and set commands associated with it. The match commands specify the match criteria—the conditions under which redistribution is allowed for the current route-map command. The set commands specify the set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met. The no route-map command deletes the route map.

The match route-map configuration command has multiple formats. The match commands may be given in any order, and all defined match criteria must be satisfied to cause the route to be redistributed according to the set actions given with the set commands. The no forms of the match commands remove the specified match criteria.

Examples

In the following configuration, an ISO IGRP-learned route with a prefix 49.0001.0002 will be redistributed if it satisfies the CLNS route-source matching criterion:

router isis

 redistribute iso-igrp remote route-map ourmap

route-map ourmap permit

 match clns route-source ourprefix

 clns filter-set ourprefix permit 49.0001.0002...

Related Commands

Command	Description
match clns address	Defines the match criterion.
match clns next-hop	Defines the next-hop match criterion.
match interface (ISO CLNS)	Defines the interface match criterion.
match metric (ISO CLNS)	Defines the metric match criterion.
match route-type (ISO CLNS)	Defines the route-type match criterion.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.
set level (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric (ISO CLNS)	Sets the metric value to give the redistributed routes.
set metric-type (ISO CLNS)	Sets the metric type to give redistributed routes.
set tag (ISO CLNS)	Sets a tag value to associate with the redistributed routes.

match interface (ISO CLNS)

To define the interface match criterion, use the match interface command in route-map configuration mode. Routes that have the next hop out one of the interfaces specified—and that satisfy all other defined match criteria—will be redistributed. To remove the specified match criterion, use the no form of this command.

match interface type number [type number...type number]

no match interface type number [type number...type number]

Syntax Description

type	Interface type.
number	Interface number.

Defaults

Disabled

Command Modes

Route-map configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the route-map global configuration command, and the route-map configuration commands match and set, to define the conditions for redistributing routes from one routing protocol into another. Each route-map command has a list of match and set commands associated with it. The match commands specify the match criteria—the conditions under which redistribution is allowed for the current route-map command. The set commands specify the set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met. The no route-map command deletes the route map.

The match route-map configuration command has multiple formats. The match commands may be given in any order, and all defined match criteria must be satisfied to cause the route to be redistributed according to the set actions given with the set commands. The no forms of the match commands remove the specified match criteria.

Examples

In the following configuration, an ISO IGRP-learned route with a prefix 49.0001.0002 will be redistributed if it satisfies the interface (ISO CLNS) matching criterion:

router isis

 redistribute rip route-map ourmap

 redistribute iso-igrp remote route-map ourmap

route-map ourmap permit

 match interface ethernet2

Related Commands

Command	Description
match clns address	Defines the match criterion.
match clns next-hop	Defines the next-hop match criterion.
match clns route-source	Defines the route-source match criterion.
match interface (ISO CLNS)	Defines the route-source match criterion.
match metric (ISO CLNS)	Defines the metric match criterion.
match route-type (ISO CLNS)	Defines the route-type match criterion.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.
set level (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric-type (ISO CLNS)	Sets the metric type to give redistributed routes.
set tag (ISO CLNS)	Sets a tag value to associate with the redistributed routes.

match metric (ISO CLNS)

To define the metric match criterion, use the match metric command in route-map configuration mode. Routes that have the specified metric—and satisfy all other defined match criteria—will be redistributed. To remove the specified match criterion, use the no form of this command.

match metric metric-value

no match metric metric-value

Syntax Description

metric-value

Route metric. This can be an Interior Gateway Routing Protocol (IGRP) five-part metric.

Defaults

Disabled

Command Modes

Route-map configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the route-map global configuration command, and the route-map configuration commands match and set, to define the conditions for redistributing routes from one routing protocol into another. Each route-map command has a list of match and set commands associated with it. The match commands specify the match criteria—the conditions under which redistribution is allowed for the current route-map command. The set commands specify the set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met. The no route-map command deletes the route map.

The match route-map configuration command has multiple formats. The match commands may be given in any order, and all defined match criteria must be satisfied to cause the route to be redistributed according to the set actions given with the set commands. The no forms of the match commands remove the specified match criteria.

Examples

In the following configuration, an ISO IGRP-learned route with a prefix 49.0001.0002 will be redistributed if it satisfies the metric (ISO CLNS) matching criterion:

router isis

 redistribute rip route-map ourmap

 redistribute iso-igrp remote route-map ourmap

route-map ourmap permit

 match metric 26795

 clns filter-set ourprefix permit 49.0001.0002...

Related Commands

Command	Description
match clns address	Defines the match criterion.
match clns next-hop	Defines the next-hop match criterion.
match clns route-source	Defines the route-source match criterion.
match interface (ISO CLNS)	Defines the route-source match criterion.
match route-type (ISO CLNS)	Defines the route-type match criterion.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.
set level (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric-type (ISO CLNS)	Sets the metric type to give redistributed routes.
set tag (ISO CLNS)	Sets a tag value to associate with the redistributed routes.

match route-type (ISO CLNS)

To define the route-type match criterion, use the match route-type command in route-map configuration mode. Routes that have the specified route type—and satisfy all other defined match criteria—will be redistributed. To remove the specified match criterion, use the no form of this command.

match route-type {level-1 | level-2}

no match route-type {level-1 | level-2}

Syntax Description

level-1	IS-IS Level 1 routes.
level-2	IS-IS Level 2 routes.

Defaults

Disabled

Command Modes

Route-map configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the route-map global configuration command, and the route-map configuration commands match and set, to define the conditions for redistributing routes from one routing protocol into another. Each route-map command has a list of match and set commands associated with it. The match commands specify the match criteria—the conditions under which redistribution is allowed for the current route-map command. The set commands specify the set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met. The no route-map command deletes the route map.

The match route-map configuration command has multiple formats. The match commands may be given in any order, and all defined match criteria must be satisfied to cause the route to be redistributed according to the set actions argument given with the set commands. The no forms of the match commands remove the specified match criteria.

Examples

In the following configuration, an ISO IGRP-learned route with a prefix 49.0001.0002 will be redistributed if it satisfies the route-type (ISO CLNS) matching criterion:

router isis

 redistribute rip route-map ourmap

 redistribute iso-igrp remote route-map ourmap

route-map ourmap permit

 match route-type level-2

 clns filter-set ourprefix permit 49.0001.0002...

Related Commands

Command	Description
match clns address	Defines the match criterion.
match clns next-hop	Defines the next-hop match criterion.
match clns route-source	Defines the route-source match criterion.
match interface (ISO CLNS)	Defines the route-source match criterion.
match metric (ISO CLNS)	Defines the metric match criterion.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.
set level (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric-type (ISO CLNS)	Sets the metric type to give redistributed routes.
set tag (ISO CLNS)	Sets a tag value to associate with the redistributed routes.

metric weights (ISO CLNS)

To specify different metrics for the ISO IGRP routing protocol on CLNS, use the metric weights command in router configuration mode. This command allows you to configure the metric constants used in the ISO IGRP composite metric calculation of reliability and load. To return the five k arguments to their default values, use the no form of this command.

metric weights qos k1 k2 k3 k4 k5

no metric weights

Syntax Description

qos	QoS defines transmission quality and availability of service. The argument must be 0, the default metric.
k1, k2, k3, k4, k5	Values that apply to ISO IGRP for the default metric QoS. The k values are metric constants used in the ISO IGRP equation that converts an IGRP metric vector into a scalar quantity. They are numbers from 0 to 127; higher numbers mean a greater multiplier effect.

Defaults

qos: 0
k1: 1
k2: 0
k3: 1
k4: 0
k5: 0

Command Modes

Router configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Two additional ISO IGRP metrics can be configured. These are the bandwidth and delay associated with an interface.

---

Note Using the bandwidth and delay interface configuration commands to change the values of the ISO IGRP metrics also changes the values of IP IGRP metrics.

---

By default, the IGRP composite metric is a 24-bit quantity that is a sum of the segment delays and the lowest segment bandwidth (scaled and inverted) for a given route. For a network of homogeneous media, this metric reduces to a hop count. For a network of mixed media (FDDI, Ethernet, and serial lines running from 9600 bps to T1 rates), the route with the lowest metric reflects the most desirable path to a destination.

Use this command to alter the default behavior of IGRP routing and metric computation and allow the tuning of the IGRP metric calculation for QoS.

If k5 equals 0, the composite IGRP metric is computed according to the following formula:

metric = [K1 * bandwidth + (K2 * bandwidth) / (256 - load) + K3 * delay]

If k5 does not equal zero, the following additional operation is done:

metric = metric * [K5 / (reliability + K4)]

The default version of IGRP has both k1 and k3 equal to 1, and k2, k4, and k5 equal to 0.

Delay is in units of 10 microseconds. This gives a range of 10 microseconds to 168 seconds. A delay of all ones indicates that the network is unreachable.

Bandwidth is inverse minimum bandwidth of the path in bits per second scaled by a factor of 10e10. The range is 1200 bps to 10 Gbps.

Table 30 lists the default values used for several common media.

Table 30 Bandwidth Values by Media Type

Media Type	Delay	Bandwidth
Satellite	200,000 (2 sec)	20 (500 Mbit)
Ethernet	100 (1 ms)	1,000
1.544 Mbps	2000 (20 ms)	6,476
64 kbps	2000	156,250
56 kbps	2000	178,571
10 kbps	2000	1,000,000
1 kbps	2000	10,000,000

Reliability is given as a fraction of 255. That is, 255 is 100 percent reliability or a perfectly stable link. Load is given as a fraction of 255. A load of 255 indicates a completely saturated link.

Examples

The following example sets all five metric constants:

router iso-igrp

 metric weights 0 2 0 1 0 0 

Related Commands

Command	Description
bandwidth (interface)	Sets a bandwidth value for an interface.
delay	Sets a delay value for an interface.

redistribute (ISO CLNS)

To redistribute routes from one routing domain into another routing domain, use the redistribute command in router configuration mode. To disable redistribution, or to disable any of the specified keywords, use the no form of this command.

redistribute protocol [tag] [route-map map-tag]

no redistribute protocol [tag] [route-map map-tag] static [clns | ip]

Syntax Description

protocol	Type of other routing protocol that is to be redistributed as a source of routes into the current routing protocol being configured. The keywords supported are iso-igrp, isis, and static.
tag	(Optional) Meaningful name for a routing process.
route-map map-tag	(Optional) Route map should be interrogated to filter the importation of routes from this source routing protocol to the current routing protocol. If not specified, all routes are redistributed. If this keyword is specified, but no route map tags are listed, no routes will be imported. The argument map-tag is the identifier of a configured route map.
static	Keyword static is used to redistribute static routes. When used without the optional keywords, Cisco IOS software injects any OSI static routes into an OSI domain.
clns	(Optional) Keyword clns is used when redistributing OSI static routes into an IS-IS domain.
ip	(Optional) Keyword ip is used when redistributing IP into an IS-IS domain.

Defaults

Disabled, except for static routes, which by default are redistributed into IS-IS routing domains but are not redistributed into ISO IGRP domains. The keyword clns is the default with the keyword static.

Command Modes

Router configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

When used with IS-IS, the redistribute command causes the routes learned by the routing process tag to be advertised in the IS-IS routing process. Static routes are always redistributed into IS-IS unless a no redistribute static command is performed. Redistribution only occurs for Level 2 routing.

You can specify more than one IS-IS process per router. Cisco IOS Release 12.1 provides multi-area support where each IS-IS process can handle a separate level-1 area. To create more than one level-1 IS-IS routing process, use the clns router isis command in interface configuration mode. You must use the area tag argument for multiarea IS-IS configuration, in order to define a meaningful name for each routing process. See the clns router isis command earlier in this chapter for more information.

When used with ISO IGRP, if you have a router that is in two routing domains, you might want to redistribute routing information between the two domains. The redistribute router configuration command configures which routes are redistributed into the ISO IGRP domain. It is not necessary to use redistribution between areas.

The tag argument must be unique among all CLNS router processes for a given router. This tag should be the same as defined for the routing process in the router iso-igrp global configuration command.

Static routes are only redistributed into ISO IGRP when a redistribute static command is entered. The default is to not redistribute static routes into ISO IGRP. Only the router that injects the static route needs to have a redistribute static command defined. This command is needed only when you run ISO IGRP.

Examples

The following example illustrates redistribution of ISO IGRP routes of Michigan and ISO IGRP routes of Ohio into the IS-IS area tagged USA:

router isis USA

 redistribute iso-igrp Michigan

 redistribute iso-igrp Ohio

The following example illustrates redistribution of IS-IS routes of France and ISO IGRP routes of Germany into the ISO IGRP area tagged Backbone:

router iso-igrp Backbone

 redistribute isis France

 redistribute iso-igrp Germany

In the following example, the router advertises any static routes it knows about in the Chicago domain:

router iso-igrp Chicago

 redistribute static

Related Commands

Command	Description
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.

route-map (ISO CLNS)

To define the conditions for redistributing routes from one routing protocol into another, use the route-map command in global configuration mode. To delete the route map, use the no form of this command.

route-map map-tag {permit | deny} sequence-number

no route-map map-tag {permit | deny} sequence-number

Syntax Description

map-tag	Meaningful name for the route map. The redistribute command uses this name to reference this route map. Multiple route-maps can share the same map tag name. Can either be an expression or a filter set.
permit	If the match criteria are met for this route map, and permit is specified, the route is redistributed as controlled by the set actions. If the match criteria are not met, and permit is specified, the next route map with the same map-tag is tested. If a route passes none of the match criteria for the set of route maps sharing the same name, it is not redistributed by that set.
deny	If the match criteria are met for the route map, and deny is specified, the route is not redistributed, and no further route maps sharing the same map tag name will be examined.
sequence-number	Number that indicates the position a new route map is to have in the list of route maps already configured with the same name. If given with the no form of this command, it specifies the position of the route map that should be deleted.

Command Modes

Global configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the route-map global configuration command, and the route-map configuration commands match and set, to define the conditions for redistributing routes from one routing protocol into another. Each route-map command has a list of match and set commands associated with it. The match commands specify the match criteria—the conditions under which redistribution is allowed for the current route-map command. The set commands specify the set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met.

Related Commands

Command	Description
match clns address	Defines the match criterion.
match clns next-hop	Defines the next-hop match criterion.
match clns route-source	Defines the route-source match criterion.
match interface (ISO CLNS)	Defines the interface match criterion.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
set level (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric (ISO CLNS)	Sets the metric value to give the redistributed routes.
set metric-type (ISO CLNS)	Sets the metric type to give redistributed routes.
set tag (ISO CLNS)	Sets a tag value to associate with the redistributed routes.

router iso-igrp

To identify the area that the router will work in and let it know that it will be routing dynamically using the ISO IGRP protocol, use the router iso-igrp command in global configuration mode. To disable ISO IGRP routing for the system, use the no form of this command with the appropriate tag.

router iso-igrp [tag]

no router iso-igrp [tag]

Syntax Description

tag

(Optional) Meaningful name for a routing process. For example, you could define a routing process named Finance for the Finance department, and another routing process named Marketing for the Marketing department. If not specified, a null tag is assumed. The tag argument must be unique among all CLNS router processes for a given router.

Defaults

Disabled

Command Modes

Global configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Creating a name for a routing process means that you use names when configuring routing. You can specify up to ten ISO IGRP processes.

Examples

The following example specifies a router in Manufacturing. The command must be typed on one line.

router iso-igrp Manufacturing

Related Commands

Command	Description
clns router iso-igrp	Specifies ISO IGRP routing on a specified interface.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.

set level (ISO CLNS)

To specify the routing level of routes to be advertised into a specified area of the routing domain, use the set level command in route-map configuration mode. To disable advertising the specified routing level into a specified area, use the no form of this command.

set level {level-1 | level-2 | level-1-2}

no set level {level-1 | level-2 | level-1-2}

Syntax Description

level-1	Inserted in IS-IS Level 1 link-state PDUs.
level-2	Inserted in IS-IS Level 2 link-state PDUs. For IS-IS destinations, level-2 is the default.
level-1-2	Inserted into both Level 1 and Level 2 IS-IS link-state PDUs.

Defaults

Disabled

Command Modes

Route-map configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the route-map global configuration command, and the route-map configuration commands match and set, to define the conditions for redistributing routes from one routing protocol into another. Each route-map command has a list of match and set commands associated with it. The match commands specify the match criteria—the conditions under which redistribution is allowed for the current route-map command. The set commands specify the redistribution set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met. When all match criteria are met, all set actions are performed. The no route-map command deletes the route map.

Examples

Given the following configuration, a RIP-learned route for network 160.89.0.0 and an ISO IGRP-learned route with prefix 49.0001.0002 will be redistributed into an IS-IS Level 2 link-state PDU with metric 5:

router isis

 redistribute rip route-map ourmap

 redistribute iso-igrp remote route-map ourmap

route-map ourmap permit

 match ip address 1

 match clns address ourprefix

 set metric 5

 set level level-2

 access-list 1 permit 160.89.0.0 0.0.255.255

 clns filter-set ourprefix permit 49.0001.0002...

Related Commands

Command	Description
match clns address	Defines the match criterion.
match clns next-hop	Defines the next-hop match criterion.
match clns route-source	Defines the route-source match criterion.
match interface (ISO CLNS)	Defines the interface match criterion.
match metric (ISO CLNS)	Defines the metric match criterion.
match route-type (ISO CLNS)	Sets the metric type to give redistributed routes.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.
set metric (ISO CLNS)	Sets the metric value to give the redistributed routes.
set metric-type (ISO CLNS)	Sets the metric type to give redistributed routes.
set tag (ISO CLNS)	Sets a tag value to associate with the redistributed routes.

set metric (ISO CLNS)

To change the metric value used to redistribute routes, use the set metric command in route-map configuration mode. To reinstate the original metric values, use the no form of this command.

set metric metric-value

no set metric metric-value

Syntax Description

metric-value

Route metric. This can be an IGRP five-part metric.

Defaults

Disabled

Command Modes

Route-map configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the route-map global configuration command, and the route-map configuration commands match and set, to define the conditions for redistributing routes from one routing protocol into another. Each route-map command has a list of match and set commands associated with it. The match commands specify the match criteria—the conditions under which redistribution is allowed for the current route-map command. The set commands specify the redistribution set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met. When all match criteria are met, all set actions are performed. The no route-map command deletes the route map.

Examples

Given the following configuration, a RIP-learned route for network 160.89.0.0 and an ISO IGRP-learned route with prefix 49.0001.0002 will be redistributed into an IS-IS Level 2 link-state PDU with metric 5:

router isis

 redistribute rip route-map ourmap

 redistribute iso-igrp remote route-map ourmap

!

route-map ourmap permit

 match ip address 1

 match clns address ourprefix

 set metric 5

 set level level-2

!

 access-list 1 permit 160.89.0.0 0.0.255.255

 clns filter-set ourprefix permit 49.0001.0002...

Related Commands

Command	Description
match clns address	Defines the match criterion.
match clns next-hop	Defines the next-hop match criterion.
match clns route-source	Defines the route-source match criterion.
match interface (ISO CLNS)	Defines the interface match criterion.
match metric (ISO CLNS)	Defines the metric match criterion.
match route-type (ISO CLNS)	Sets the metric type to give redistributed routes.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.
set level (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric-type (ISO CLNS)	Sets the metric type to give redistributed routes.
set tag (ISO CLNS)	Sets a tag value to associate with the redistributed routes.

set metric-type (ISO CLNS)

To set the metric type for redistributed routes, use the set metric-type command in route-map configuration mode. To reinstate the original metric type, use the no form of this command.

set metric-type {internal | external}

no set metric-type {internal | external}

Syntax Description

internal	IS-IS internal metric.
external	IS-IS external metric.

Defaults

Disabled

Command Modes

Route-map configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the route-map global configuration command, and the route-map configuration commands match and set, to define the conditions for redistributing routes from one routing protocol into another. Each route-map command has a list of match and set commands associated with it. The match commands specify the match criteria—the conditions under which redistribution is allowed for the current route-map command. The set commands specify the redistribution set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met. When all match criteria are met, all set actions are performed. The no route-map command deletes the route map.

Examples

The following example sets the metric type of the destination protocol to IS-IS internal metric:

route-map map-type

 set metric-type internal

Related Commands

Command	Description
match clns address	Defines the match criterion.
match clns next-hop	Defines the next-hop match criterion.
match clns route-source	Defines the route-source match criterion.
match interface (ISO CLNS)	Defines the interface match criterion.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
match clns address	Defines the match criterion.
match clns next-hop	Defines the next-hop match criterion.
match clns route-source	Defines the route-source match criterion.
match interface (ISO CLNS)	Defines the interface match criterion.
match metric (ISO CLNS)	Defines the metric match criterion.
match route-type (ISO CLNS)	Sets the metric type to give redistributed routes.
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.
set level (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric (ISO CLNS)	Sets the metric value to give the redistributed routes.
set tag (ISO CLNS)	Sets a tag value to associate with the redistributed routes.

set tag (ISO CLNS)

To set a tag value to associate with the redistributed routes, use the set tag command in route-map configuration mode. To revert to redistributing routes without associating a specific tag with them, use the no form of this command.

set tag tag-value

no set tag tag-value

Syntax Description

tag-value

Name for the tag. The tag value to associate with the redistributed route. If not specified, the default action is to forward the tag in the source routing protocol onto the new destination protocol.

Defaults

Disabled

Command Modes

Route-map configuration

Command History

Release	Modification
10.0	This command was introduced.

Usage Guidelines

Use the route-map global configuration command, and the route-map configuration commands match and set, to define the conditions for redistributing routes from one routing protocol into another. Each route-map command has a list of match and set commands associated with it. The match commands specify the match criteria—the conditions under which redistribution is allowed for the current route-map command. The set commands specify the redistribution set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met. When all match criteria are met, all set actions are performed. The no route-map command deletes the route map.

Examples

The following example sets the tag value of the destination routing protocol to 5:

route-map tag

 set tag 5

Related Commands

Command	Description
match clns address	Defines the match criterion.
match clns next-hop	Defines the next-hop match criterion.
match clns route-source	Defines the route-source match criterion.
match interface (ISO CLNS)	Defines the interface match criterion.
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.
set level (ISO CLNS)	Specifies the routing level of routes to be advertised into a specified area of the routing domain.
set metric (ISO CLNS)	Sets the metric value to give the redistributed routes.
set metric-type (ISO CLNS)	Sets the metric type to give redistributed routes.

show clns

To display information about the CLNS network, use the show clns command in EXEC mode.

show clns

Syntax Description

This command has no arguments or keywords.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Examples

The following is sample output from the show clns command:

Router# show clns

Global CLNS Information:

  2 Interfaces Enabled for CLNS

  NET: 39.0004.0030.0000.0C00.224D.00

  NET: 39.0003.0020.0000.0C00.224D.00

  Configuration Timer: 60, Default Holding Timer: 300, Packet Lifetime 64

  ERPDU's requested on locally generated packets

  Intermediate system operation enabled (forwarding allowed)

  ISO IGRP level-1 Router: remote

     Routing for Domain: 39.0003, Area: 0020

  ISO IGRP level-2 Router: DOMAIN_remote

     Routing for Domain: 39.0003

  IS-IS level-1-2 Router:

     Routing for Area: 39.0004.0030

Table 31 describes significant fields shown in the display.

Table 31 show clns Field Descriptions 

Field	Description
2 Interfaces Enabled for CLNS	Indicates how many interfaces have the CLNS protocol enabled.
NET: 39.0004.0030.0000.0C00.224D.00	First of two NETs for this router.
Configuration Timer: 60	Displays the interval (in seconds) after which the router sends out IS hello packets.
Default Holding Timer: 300	Length of time (in seconds) hello packets are remembered.
Packet Lifetime 64	Default value used in packets sourced by this router.
ERPDUs requested on locally generated packets	Indicates whether ERPDUs are requested for packets sourced by the router.
Intermediate system operation enabled (forwarding allowed)	Indicates whether this router is configured to be an ES or an IS.
ISO IGRP level-1 Router: remote	Specifies what CLNS routing type (ISO IGRP or IS-IS) and what routing level (Level 1, Level 2, or both) is enabled on the router.
Routing for Domain: 39.0003, Area: 0020	Specifies the domain (39.0003) and area (0020) for which this CLNS routing type and routing level is enabled.
IS-IS level-1-2 Router:	Specifies that IS-IS is running in this router. Its tag is null. It is running Level 1 and Level 2.
Routing for Area: 39.0004.0030	Specifies the IS-IS area this router is in.

show clns cache

To display the CLNS route cache, use the show clns cache command in EXEC mode. The cache contains an entry for each destination that recently has been fast-switched. The output of this command includes entries showing each destination for which the router has switched a packet in the recent past. This includes the router itself.

show clns cache [delay-parameters | invalidations]

Syntax Description

delay-parameters	(Optional) Current settings for delays when entries are invalidated in the CLNS route cache.
invalidations	(Optional) When specified, shows the last time each function purged the CLNS route cache.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Examples

The following is sample output from the show clns cache command:

Router# show clns cache

CLNS routing cache version 433

Destination -> Next hop @ Interface: SNPA Address => Rewrite / Length

[42] *39.0004.0040.0000.0C00.2D55.00 ISOLATOR

-> 0000.0C00.2D55 @ Ethernet0/1: 0000.0c00.6fa5

Table 32 describes significant fields shown in the display.

Table 32 show clns cache Field Descriptions 

Field	Description
CLNS routing cache version 433	Number identifying this particular CLNS routing cache.
Destination -> Next hop @ Interface: SNPA Address Rewrite / Length	Destination NSAP for the packet. Next hop system ID used to reach the destination. Interface through which the router transmitted the packet. Address of the subnetwork point of attachment (SNPA) of the next hop for this destination NSAP. Interface encapsulation data and length of the cache entry that the cache must overwrite onto the outgoing frame prior to sending it. If the rewrite length of the cache entry is zero, this field will not be displayed.
[42]	Cache location for this entry.
*39.0004.0040.0000.0C00.2D55.001	Destination NSAP address.
ISOLATOR	Destination host name.
0000.0C00.2D55	System ID of the next-hop router.
Ethernet0/1	Interface through which the router transmitted the packet.
000.0c00.6fa5	SNPA for the next-hop router through the output interface.

1 A leading asterisk (*) indicates that the entry is an allowable value.

The following is sample output from the show clns cache delay-parameters command:

Router#

Minimum invalidation interval 2 seconds,

Maximum invalidation interval 5 seconds,

Quiet interval 3 seconds,

Threshold 0 requests

Invalidation rate 3 in last second, 3 in last 3 seconds

Table 33 describes significant fields shown in the display.

Table 33 show clns cache delay-parameters Field Descriptions 

Field	Description
Minimum invalidation interval	Minimum time (in seconds) between invalidation request and actual invalidation.
Maximum Invalidation interval	Maximum time (in seconds) between invalidation request and actual invalidation.
Quiet interval	Length of time (in seconds) before invalidation.
Threshold	Maximum number of invalidations considered to be quiet.
Invalidation rate	Number of invalidations (route cache purges) per second.

The following is sample output from the show clns cache invalidations command:

Router#

Caller              Count       Last Invalidation

clns_fastsetup      3           20:55:56

clns_route_update   23          20:56:44

clns_route_adjust   2           20:55:52

isis_compute_spt    2017        00:10:13

delete_adjacency    9           1d19h

clns_ager           11          1d19h

Table 34 describes significant fields shown in the display.

Table 34 show clns cache invalidations Field Descriptions 

Field	Description
Caller	Lists the names of the functions that have purged the CLNS route cache.
Count	Number of times the function has invalidated the CLNS route cache.
Last invalidation	The last time the function invalidated the CLNS route cache.

Related Commands

Command	Description
clear clns cache	Clears and reinitializes the CLNS routing cache.

show clns es-neighbors

To list the ES neighbors that this router knows about, use the show clns es-neighbors command in EXEC mode.

show clns area-tag es-neighbors [type number] [detail]

Syntax Description

area-tag	Required for multiarea IS-IS configuration. Optional for conventional IS-IS configuration. Meaningful name for a routing process. This name must be unique among all IP or Connectionless Network Service (CLNS) router processes for a given router. If an area tag is not specified, a null tag is assumed and the process is referenced with a null tag. If an area tag is specified, output is limited to the specified area.
type	(Optional) Interface type.
number	(Optional) Interface number.
detail	(Optional) When specified, the areas associated with the end systems are displayed. Otherwise, a summary display is provided.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.
12.0(5)T	The area-tag argument was added.

Examples

The following is sample output from the show clns es-neighbors command when Ethernet interface 0 is specified:

Router# show clns es-neighbors ethernet0

System Id       Interface   State  Type  Format

0800.2B14.060E  Ethernet0   Up     ES    Phase V

0800.2B14.0528  Ethernet0   Up     ES    Phase V

Table 35 describes the significant fields shown in the display.

Table 35 show clns es-neighbors Field Descriptions 

Field	Descriptions
System Id	Identification value of the system.
Interface	Interface on which the router was discovered.
State	Adjacency state. Up and Init are the states. See the show clns neighbors description.
Type	Type of neighbor. Only valid value for the show clns es-neighbors EXEC command is ES.
Format	Indicates if the neighbor is either a Phase V (OSI) adjacency or Phase IV (DECnet) adjacency.

The following is sample output from the show clns es-neighbors detail command:

router# show clns es-neighbors detail

System Id       Interface  State  Type  Format

0800.2B14.060E  Ethernet0  Up      ES   Phase V

Area Address(es): 49.0040

0800.2B14.0528 Ethernet0  Up      ES    Phase V

Area Address(es): 49.0040

Notice that the information displayed in show clns es-neighbors detail output includes everything shown in show clns es-neighbors output, but it also includes the area addresses associated with the ES neighbors.

Related Commands

Command	Description
clear clns es-neighbors	Removes ES neighbor information from the adjacency database.
clns es-neighbor	Defines all end systems that will be used when you manually specify the NSAP-to-SNPA mapping.

show clns filter-expr

To display one or all currently defined CLNS filter expressions, use the show clns filter-expr command in EXEC mode.

show clns filter-expr [name] [detail]

Syntax Description

name	(Optional) Name of the filter expression to display. If none is specified, all are displayed.
detail	(Optional) When specified, expressions are evaluated down to their most primitive filter set terms before being displayed.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Examples

The following displays assume filter expressions have been defined with the following commands. FRED, BARNEY, WILMA, and BETTY are all filter sets.

clns filter-expr MEN FRED or BARNEY

clns filter-expr WOMEN WILMA or BETTY

clns filter-expr ADULTS MEN or WOMEN

The show clns filter-expr command would yield the following output:

Router# show clns filter-expr

MEN = FRED or BARNEY

WOMEN = WILMA or BETTY

ADULTS = MEN or WOMEN

The show clns filter-expr detail command would yield the following output:

Router# show clns filter-expr detail

MEN = FRED or BARNEY

WOMEN = WILMA or BETTY

ADULTS = (FRED or BARNEY) or (WILMA or BETTY)

Related Commands

Command	Description
clns filter-expr	Combines CLNS filter sets and CLNS address templates to create complex logical NSAP pattern-matching expressions.

show clns filter-set

To display one or all currently defined CLNS filter sets, use the show clns filter-set command in EXEC mode.

show clns filter-set [name]

Syntax Description

name	(Optional) Name of the filter set to display. If none is specified, all are displayed.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Examples

The following display assumes filter sets have been defined with the following commands:

clns filter-set US-OR-NORDUNET 47.0005...

clns filter-set US-OR-NORDUNET 47.0023...

clns filter-set LOCAL 49.0003...

The following is a sample output from the show clns filter-set command:

Router# show clns filter-set

CLNS filter set US-OR-NORDUNET

permit 47.0005...

permit 47.0023...

CLNS filter set LOCAL

permit 49.0003...

Related Commands

Command	Description
clns filter-set	Builds a list of CLNS address templates with associated permit and deny conditions for use in CLNS filter expressions.

show clns interface

To list the CLNS-specific information about each interface, use the show clns interface command in EXEC mode.

show clns interface [type number]

Syntax Description

type	(Optional) Interface type.
number	(Optional) Interface number.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Examples

The following is sample output from the show clns interface command that includes information for Token Ring and serial interfaces:

Router# show clns interface

TokenRing 0 is administratively down, line protocol is down

  CLNS protocol processing disabled

TokenRing 1 is up, line protocol is up

  Checksums enabled, MTU 4461, Encapsulation SNAP

  ERPDUs enabled, min. interval 10 msec.

  RDPDUs enabled, min. interval 100 msec., Addr Mask enabled

  Congestion Experienced bit set at 4 packets

  CLNS fast switching disabled

  DEC compatibility mode OFF for this interface

  Next ESH/ISH in 18 seconds

  Routing Protocol: ISO IGRP

      Routing Domain/Area: <39.0003> <0020>

Serial 2 is up, line protocol is up

  Checksums enabled, MTU 1497, Encapsulation HDLC

ERPDUs enabled, min. interval 10 msec.

     RDPDUs enabled, min. interval 100 msec., Addr Mask enabled

     Congestion Experienced bit set at 4 packets

     CLNS fast switching enabled

     DEC compatibility mode OFF for this interface

     CLNS cluster alias enabled on this interface

     Next ESH/ISH in 48 seconds

  Routing Protocol: IS-IS

       Circuit Type: level-1-2

       Level-1 Metric: 10, Priority: 64, Circuit ID: 0000.0C00.2D55.0A

       Number of active level-1 adjacencies: 0

       Level-2 Metric: 10, Priority: 64, Circuit ID: 0000.0000.0000.00

       Number of active level-2 adjacencies: 0

       Next IS-IS LAN Level-1 hello in 3 seconds

       Next IS-IS LAN Level-2 hello in 3 seconds

Table 36 describes significant fields shown in the display.

Table 36 show clns interface Field Descriptions 

Field	Description
TokenRing 0 is administratively down, line protocol is down	(First interface). Shown to be administratively down with CLNS disabled.
TokenRing 1 is up, line protocol is up	(Second interface). Shown to be up, and the line protocol is up.
Serial 2 is up, line protocol is up	(Third interface). Shown to be up, and the line protocol is up.
Checksums enabled	Can be enabled or disabled.
MTU	The number following MTU is the maximum transmission size for a packet on this interface.
Encapsulation	Describes the encapsulation used by CLNP packets on this interface.
ERPDUs	Displays information about the generation of ERPDUs. They can be either enabled or disabled. If they are enabled, they are sent out no more frequently than the specified interval.
RDPDUs	Provides information about the generation of RDPDUs. They can be either enabled or disabled. If they are enabled, they are sent out no more frequently than the specified interval. If the address mask is enabled, redirects are sent out with an address mask.
Congestion Experienced	Tells when CLNS will turn on the congestion experienced bit. The default is to turn this bit on when there are more than four packets in a queue.
CLNS fast switching	Displays whether fast switching is supported for CLNS on this interface.
DEC compatibility mode	Indicates whether DEC compatibility has been enabled.
CLNS cluster alias enabled on this interface	Indicates that CLNS cluster aliasing has been enabled on this interface.
Next ESH/ISH	Displays when the next ES hello or IS hello is sent on this interface.
Routing Protocol	Lists the areas that this interface is in. In most cases, an interface will be in only one area.
Circuit type	Indicates whether the interface has been configured for local routing (Level 1), area routing (Level 2), or local and area routing (Level 1-2).
Remaining fields	Last series of fields displays information pertaining to the ISO CLNS routing protocols enabled on the interface. For ISO IGRP, the routing domain and area addresses are specified. For IS-IS, the Level 1 and Level 2 metrics, priorities, Circuit IDs, and number of active Level 1 and Level 2 adjacencies are specified.

show clns is-neighbors

To display Intermediate System-to-Intermediate System (IS-IS) related information for IS-IS router adjacencies, use the show clns is-neighbors command in EXEC mode. Neighbor entries are sorted according to the area in which they are located.

show clns area-tag is-neighbors [type number] [detail]

Syntax Description

area-tag	Required for multiarea IS-IS configuration. Optional for conventional IS-IS configuration. Meaningful name for a routing process. This name must be unique among all IP or CLNS router processes for a given router. If an area tag is not specified, a null tag is assumed and the process is referenced with a null tag. If an area tag is specified, output is limited to the specified area.
type	(Optional) Interface type.
number	(Optional) Interface number.
detail	(Optional) When specified, the areas associated with the intermediate systems are displayed. Otherwise, a summary display is provided.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Examples

The following is sample output from the show clns is-neighbors command:

Router# show clns is-neighbors

System Id       Interface   State  Type  Priority  Circuit Id         Format

0000.0C00.0C35  Ethernet1   Up     L1    64        0000.0C00.62E6.03  Phase V

0800.2B16.24EA  Ethernet0   Up     L1L2  64/64     0800.2B16.24EA.01  Phase V

0000.0C00.3E51  Serial1     Up     L2    0         04                 Phase V

0000.0C00.62E6  Ethernet1   Up     L1    64        0000.0C00.62E6.03  Phase V

Table 37 describes significant fields shown in the display.

Table 37 show clns is-neighbors Field Descriptions 

Field	Descriptions
System Id	Identification value of the system.
Interface	Interface on which the router was discovered.
State	Adjacency state. Up and Init are the states. See the show clns neighbors description.
Type	L1, L2, and L1L2 type adjacencies. See the show clns neighbors description.
Priority	IS-IS priority that the respective neighbor is advertising. The highest priority neighbor is elected the designated IS-IS router for the interface.
Circuit Id	Neighbor's idea of what the designated IS-IS router is for the interface.
Format	Indicates if the neighbor is either a Phase V (OSI) adjacency or Phase IV (DECnet) adjacency.

The following is sample output from the show clns is-neighbors detail command:

Router# show clns is-neighbors detail

System Id       Interface   State  Type  Priority  Circuit Id         Format

0000.0C00.0C35  Ethernet1   Up     L1    64        0000.0C00.62E6.03  Phase V

  Area Address(es): 47.0004.004D.0001 39.0001

  Uptime: 0:03:35 

0800.2B16.24EA  Ethernet0   Up     L1L2  64/64     0800.2B16.24EA.01  Phase V

  Area Address(es): 47.0004.004D.0001

  Uptime: 0:03:35 

0000.0C00.3E51  Serial1     Up     L2    0         04                 Phase V

  Area Address(es): 39.0004

  Uptime: 0:03:35 

000.0C00.62E6  Ethernet1    Up     L1    64        0000.0C00.62E6.03  Phase V

  Area Address(es): 47.0004.004D.0001

  Uptime: 0:03:35 

Notice that the information displayed in show clns is-neighbors detail output includes everything shown in show clns is-neighbors output, but it also includes the area addresses associated with the IS neighbors (intermediate-system adjacencies) and how long (uptime) the adjacency has existed.

Related Commands

Command	Description
clear clns is-neighbors	Removes IS neighbor information from the adjacency database.
clns is-neighbor	Defines all intermediate systems that will be used when you manually specify the NSAP-to-SNPA mapping.

show clns neighbor areas

To display information about Intermediate System-to-Intermediate System (IS-IS) neighbors and the areas to which they belong, use the show clns neighbor areas command in EXEC mode.

show clns area-tag neighbor areas

Syntax Description

area-tag

Required for multiarea IS-IS configuration. Optional for conventional IS-IS configuration. Meaningful name for a routing process. This name must be unique among all IP or CLNS router processes for a given router. If an area tag is not specified, a null tag is assumed and the process is referenced with a null tag. If an area tag is specified, output is limited to the specified area.

Command Modes

EXEC

Command History

Release	Modification
12.0(5)T	This command was introduced.

Usage Guidelines

Use the show clns neighbor areas command to verify that all expected adjacencies are up with all neighbors. If they are not, recheck the area addresses specified in both routers. If the router is running in dual CLNS-IP mode in an area, verify that a valid IP address is configured on each interface in the area. Consider using the debug isis adjacency command to gather additional information.

Examples

The following example shows output when two Level 1 and one Level 2 IS-IS areas are configured.

Router# show clns neighbor areas

System Id      Interface   Area Name           State  Holdtime  Type Protocol

0000.0000.0009 Tu529       L2BB                Up     26        L1L2 IS-IS

0000.0000.0053 Et1         A3253-01            Up     21        L1   IS-IS

0000.0000.0003 Et1         A3253-01            Up     28        L1   IS-IS

0000.0000.0002 Et2         A3253-02            Up     22        L1   IS-IS

0000.0000.0053 Et2         A3253-02            Up     23        L1   IS-IS

Table 38 describes the significant fields shown in the display.

Table 38 show clns neighbor areas Field Descriptions 

Field	Descriptions
System Id	Identification value of the system.
Interface	Interface on which the router was discovered.
Area Name	Name of the area in which the system is configured.
State	Adjacency state. Up and Init are the states. See the show clns neighbors description.
Init	System is waiting for an IS-IS hello message.
Up	Believes the system is reachable.
Holdtime	Number of seconds before this adjacency entry times out.
Type	L1, L2, and L1L2 type adjacencies.
ES	End-system adjacency either discovered by the ES-IS protocol or statically configured.
IS	Router adjacency either discovered by the ES-IS protocol or statically configured.
L1	Router adjacency for Level 1 routing only.
L1L2	Router adjacency for Level 1 and Level 2 routing.
L2	Router adjacency for Level 2 only.
Protocol	Protocol through which the adjacency was learned. Valid protocol sources are ES-IS, IS-IS, International Standards Organization Interior Gateway Routing Protocol (ISO IGRP), static, and DECnet.

Related Commands

Command	Description
show clns es-neighbors	Lists the ES neighbors that this router knows.
show clns is-neighbors	Displays IS-IS related information for IS-IS router adjacencies.
show clns neighbors	Displays both ES and IS neighbors.

show clns neighbors

To display both ES and IS neighbors, use the show clns neighbors command in EXEC mode.

show clns area-tag neighbors [type number] [area] [detail]

Syntax Description

area-tag	Required for multiarea IS-IS configuration. Optional for conventional IS-IS configuration. Meaningful name for a routing process. This name must be unique among all IP or CLNS router processes for a given router. If an area tag is not specified, a null tag is assumed and the process is referenced with a null tag. If an area tag is specified, output is limited to the specified area.
type	(Optional) Interface type.
number	(Optional) Interface number.
area	(Optional) When specified, the CLNS multiarea adjacencies are displayed.
detail	(Optional) When specified, the area addresses advertised by the neighbor in the hello messages is displayed. Otherwise, a summary display is provided.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.
12.0(5)T	The area and detail keywords were added.

Examples

The following is sample output from the show clns neighbors command. This display is a composite of the show clns es-neighbor and show clns is-neighbor commands.

Router# show clns neighbors

System Id          SNPA            Interface    State  Holdtime  Type Protocol

0000.0000.0007     aa00.0400.6408  Ethernet0    Init   277       IS   ES-IS

0000.0C00.0C35     0000.0c00.0c36  Ethernet1    Up     91        L1   IS-IS

0800.2B16.24EA     aa00.0400.2d05  Ethernet0    Up     29        L1L2 IS-IS

0800.2B14.060E     aa00.0400.9205  Ethernet0    Up     1698      ES   ES-IS

0000.0C00.3E51     *HDLC*          Serial1      Up     28        L2   IS-IS

0000.0C00.62E6     0000.0c00.62e7  Ethernet1    Up     22        L1   IS-IS

0A00.0400.2D05     aa00.0400.2d05  Ethernet0    Init   24        IS   ES-IS

Table 39 describes the fields shown in the display.

Table 39 show clns neighbors Field Descriptions 

Field	Description
System Id	Six-byte value that identifies a system in an area.
SNPA	Subnetwork Point of Attachment. This is the data link address.
Interface	Interface in which the system was learned from.
State	State of the ES or IS.
Init	System is an IS and is waiting for an IS-IS hello message. IS-IS regards the neighbor as not adjacent.
Up	Believes the ES or IS is reachable.
Holdtime	Number of seconds before this adjacency entry times out.
Type	The adjacency type. Possible values are as follows:
ES	End-system adjacency either discovered via the ES-IS protocol or statically configured.
IS	Router adjacency either discovered via the ES-IS protocol or statically configured.
L1	Router adjacency for Level 1 routing only.
L1L2	Router adjacency for Level 1 and Level 2 routing.
L2	Router adjacency for Level 2 only.
Protocol	Protocol through which the adjacency was learned. Valid protocol sources are ES-IS, IS-IS, ISO IGRP, Static, and DECnet.

The following is sample output from the show clns neighbors detail command:

Router# show clns neighbors detail

System Id       Interface  SNPA             State  Holdtime  Type  Protocol

0102.5555.0036  Et1/1      0030.80aa.9b81   Up     23        L1    IS-IS

  Area Address(es):49.0002

  IP Address(es): 175.1.19.36* 

  Uptime: 00:00:51

0000.0000.0001  Et1/1      0030.9655.201d   Up     23        L1L2  IS-IS

  Area Address(es): 49.0002

  IP Address(es): 172.16.19.22* 10.12.33.54 10.120.33.253

  Uptime: 00:25:30

Notice that the information displayed in show clns neighbors detail output includes everything shown in show clns neighbors output in addition to the area address associated with the IS neighbor and its uptime. When IP routing is enabled, Integrated-ISIS adds information to the output of the show clns commands. The show clns neighbors detail command output shows the IP addresses that are defined for the directly connected interface and an asterik (*) to indicate which IP address is the next-hop.

Related Commands

Command	Description
clear clns neighbors	Removes CLNS neighbor information from the adjacency database.

show clns protocol

To list the protocol-specific information for each ISO IGRP or Intermediate System-to-Intermediate System (IS-IS) routing process in the router, use the show clns protocol command in EXEC mode. There will always be at least two routing processes, a Level 1 and a Level 2, and there can be more.

show clns [domain | area-tag] protocol

Syntax Description

domain

(Optional) Particular ISO IGRP routing domain.

area-tag

Required for multiarea IS-IS configuration. Optional for conventional IS-IS configuration. Meaningful name for a routing process. This name must be unique among all IP or Connectionless Network Service (CLNS) router processes for a given router. If an area tag is not specified, a null tag is assumed and the process is referenced with a null tag. If an area tag is specified, output is limited to the specified area.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Examples

The following is sample output from the show clns protocol command:

Router# show clns protocol

ISO IGRP Level 1 Router: remote

   Routing for domain: 39.0003 area: 0020

   Sending Updates every 45 seconds. Next due in 11 seconds

   Invalid after 135 seconds,

   Hold down for 145 seconds

   Sending Router Hellos every 17 seconds. Next due in 9 seconds

   Invalid after 51 seconds,

   IGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0

   Interfaces in domain/area:

        TokenRing1

ISO IGRP Level 2 Router: DOMAIN_remote

   Routing for domain: 39.0003

   Redistribute:

      isis (Null Tag) 

   Sending Updates every 45 seconds. Next due in 2 seconds

   Invalid after 135 seconds,

   Hold down for 145 seconds

   Sending Router Hellos every 17 seconds. Next due in 0 seconds

   Invalid after 51 seconds,

   ISO IGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0

   Interfaces in domain/area:

        TokenRing1

IS-IS Router: <Null Tag>

   System Id: 0000.0C00.224D.00 IS-Type: level-1-2

   Manual area address(es):

        39.0004.0030

   Routing for area address(es):

        39.0004.0030

   Interfaces supported by IS-IS:

        Serial2

   Next global update in 530 seconds

   Redistributing:

      static

      iso-igrp (remote)

   Distance: 110

Table 40 describes significant fields shown in the display.

Table 40 show clns protocol Field Descriptions 

Field	Description
ISO IGRP Level 1 Router:	Indicates what CLNS routing type is enabled on the router. (Always ISO IGRP when the fields in this section are displayed.) Also indicates what routing level (Level 1, Level 2, or both) is enabled on the router.
remote	Process tag that has been configured using the router iso-igrp global configuration command.
Routing for domain: 39.0003 area: 0020	Domain address and area number for Level 1 routing processes. For Level 2 routing processes, this command lists the domain address.
Sending Updates every 45 seconds.	Displays when the next routing updates are sent.
Next due in 11 seconds	Indicates when the next update is sent.
Invalid after 135 seconds	Indicates how long routing updates are to be believed.
Hold down for 145 seconds	Indicates how long a route is held down before new information is to be believed.
Sending Router hellos every 17 seconds. Next due in 9 seconds	Indicates how often Cisco IOS software sends hello packets to each other and when the next is due.
Invalid after 51 seconds	Indicates how long a neighbor entry is remembered.
IGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0	Displays lists the weights applied to the various components of the metric. These fields are followed by the list of interfaces in this area.
Interfaces in domain/area:	List of interface names for which the router process is configured.

Table 41 describes significant fields shown in the IS-IS portion of the display.

Table 41 show clns protocol with IS-IS Field Descriptions 

Field	Description
IS_IS Router: <Null Tag>	Indicates what CLNS routing type is enabled on the router. (Always IS-IS when the fields in this section are displayed.)
System Id: 0000.0C00.224D.00	Identification value of the system.
IS-Type: level-1-2	Indicates what routing level (Level 1, Level 2 or both) is enabled on the router.
Manual area address(es): 39.0004.0030	Area addresses that have been configured.
Routing for area address(es): 39.0004.0030	List of manually configured and learned area addresses.
Interfaces supported by IS-IS:	List of interfaces on the router supporting IS-IS.
Next global update in 530 seconds	Next expected IS-IS update (in seconds).
Redistributing:	Configuration of route redistribution.
Distance:	Configured distance.

show clns route

To display one or all of the destinations to which this router knows how to route CLNS packets, use the show clns route command in EXEC mode.

show clns route nsap

Syntax Description

nsap	CLNS network service access point (NSAP) address.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.
12.0(5)T	Fields for displaying information about prefix routes were added or changed.

Usage Guidelines

The show clns route command shows the Intermediate System-to-Intermediate System (IS-IS) Level 2 routing table and static and Intermediate System-to-Intermediate System Interior Gateway Routing Protocol (ISO-IGRP) learned prefix routes. This table stores IS-IS area addresses and prefix routes.

Examples

The following is sample output from the show clns route command when the nsap argument is not used:

Router# show clns route

ISO-IGRP Routing Table for Domain 49.0002, Area 0007

System Id       Next-Hop        SNPA                Interface   Metric   State

milles          milles          *HDLC*              Se1         8476     Up

0000.0000.0007  milles          *HDLC*              Se1         10476    Up

rips            0000.0000.0000  --                  --          0        Up

ISO-IGRP Routing Table for Domain 49.0002

Area Id         Next-Hop        SNPA                Interface   Metric   State

0002            0000.0000.0000  --                  --          0        Up

Codes: C - connected, S - static, d - DecnetIV

I - ISO-IGRP,  i - IS-IS,  e - ES-IS

C  49.0002 [2/0], Local ISO-IGRP Domain

C  49.0001.0000.0000.0005.00 [1/0], Local IS-IS NET

C  49.0002.0007.0000.0000.0005.00 [1/0], Local ISO-IGRP NET

C  49.0001 [2/0], Local IS-IS Area

i  33.3333.3333 [110/10]

via bakel, Ethernet0

S  50.1234 [10/0], Discard Entry

I  55.5555.5555 [100/8476]

via milles, Serial1

S  77.7777.7777.7777 [10/0]

via Serial0

d  88.8888.8888.0007 [120/0], DecnetIV Entry

i  33.4567.8901 [110/10]

via bakel, Ethernet0

Table 42 describes the significant fields shown in the display.

Table 42 show clns route Field Descriptions 

Field	Description
Domain 49.0002	The ISO-IGRP routing domain for which we are displaying the routes.
Area 0007	The ISO-IGRP area in which the displayed the Level 1 host routes are.
System Id	Identification value of the system listed in the Level 1 forwarding table.
Area Id	The identification value of the area listed in the area forwarding table.
Next-Hop	System ID of the best cost next-hop to listed address.
SNPA	MAC address of the next-hop system.
Interface	Interface through which next-hop system is known.
Metric	ISO-IGRP cost to reach the destination.
State	Up (active) or Down (nonoperational).

Table 43 describes the codes as they appear in the previous display.

Table 43 prefix routes Field Descriptions 

Field	Description
C (connected)	The domain, area, or NET was learned via local configuration.
S (static)	The destination was learned via a locally configured static route.
d (DECnet IV)	The destination is a converted DECnet phase IV area address.
I (ISO-IGRP)	The destination is a prefix learned via Level 2 ISO-IGRP.
i (IS-IS)	The destination is a prefix learned via Level 2 IS-IS.
e (ES-IS)	The destination is learned via end system-intermediate system (ES-IS) redirects.
33.3333.3333	Destination prefix.
[110/10]	Administrative distance/metric.
via bakel	Next-hop system via which this destination is reachable. Shown as a 6-byte system ID, or as symbolic name (if available).
Ethernet0	Outgoing interface via which this destination is reachable.
Local IS-IS NET	Prefix is the full NET configured under an IS-IS process.
Field	Description
Local ISO-IGRP NET	Prefix is the full NET configured under an ISO-IGRP process.
Local ISO-IGRP Domain	Prefix is the domain part of a locally configured ISO-IGRP NET. This prefix is installed for redistribution purposes.
Local IS-IS Area	Prefix is the area address of a locally configured IS-IS NET. This prefix is installed for redistribution purposes.
Discard Entry	Prefix is learned via a locally configured static discard entry.
DecnetIV Entry	Prefix is a combination of the locally configured DECnet conversion prefix and a dynamically learned DECnet IV route. This prefix is installed for redistribution purposes.

The following is sample output showing a single CLNS route using the show clns route command with the nsap argument:

Router# show clns route 33.3333.3333

Routing entry for 33.3333.3333

Known via "isis", distance 110, metric 10, Dynamic Entry

Routing Descriptor Blocks:

via bakel, Ethernet0

isis, route metric is 10, route version is 4

Table 44 describes the significant fields shown in the display.

Table 44 show clns route Field Descriptions 

Field	Description
Routing entry for 33.3333.3333	The prefix route being examined.
Known via "isis", distance 110, metric 10, Dynamic Entry	This route was learned from an IS-IS routing process. The administrative distance is 110. The cost to reach the destination is 10.
Routing Descriptor Blocks	Each destination in the CLNS routing table can be reached by one or more paths. Each path is stored in a Routing Descriptor Block. The maximum number of paths in CLNS is 6.
via bakel, Ethernet0	Next-hop is neighbor "bakel." Outgoing interface is Ethernet0.
Redistributing via	Protocols other than originating protocol that advertise this prefix.
isis, route metric is 10, route version is 4	Originating protocol, cost for this path, route version in case this is an IS-IS route.

Related Commands

Command	Description
show clns es-neighbors	Lists the ES neighbors that this router knows.
show clns is-neighbors	Displays IS-IS related information for IS-IS router adjacencies.
show clns neighbor areas	Displays information about IS-IS neighbors and the areas to which they belong.
show clns neighbors	Displays both ES and IS neighbors.
show isis topology	Displays a list of all connected routers in all areas.

show clns traffic

To list the CLNS packets that this router has seen, use the show clns traffic command in EXEC mode.

show clns area-tag traffic

Syntax Description

area-tag

Required for multiarea IS-IS configuration. Optional for conventional IS-IS configuration. Meaningful name for a routing process. This name must be unique among all IP or CLNS router processes for a given router. If an area tag is not specified, a null tag is assumed and the process is referenced with a null tag. If an area tag is specified, output is limited to the specified area.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Examples

The following is sample output from the show clns traffic command:

Router# show clns traffic

CLNS & ESIS Output: 139885, Input: 90406

CLNS Local: 0, Forward: 0

CLNS Discards:

  	Hdr Syntax: 150, Checksum: 0, Lifetime: 0, Output cngstn: 0

  No Route: 0, Dst Unreachable 0, Encaps. Failed: 0

  NLP Unknown: 0, Not an IS: 0

CLNS Options: Packets 19, total 19, bad 0, GQOS 0, cngstn exprncd 0

CLNS Segments: Segmented: 0, Failed: 0

CLNS Broadcasts: sent: 0, rcvd: 0

Echos: Rcvd 0 requests, 69679 replies

  Sent 69701 requests, 0 replies

ESIS(sent/rcvd): ESHs: 0/34, ISHs: 483/1839, RDs: 0/0, QCF: 0/0

ISO IGRP: Querys (sent/rcvd): 0/0 Updates (sent/rcvd): 1279/1402

ISO IGRP: Router Hellos: (sent/rcvd): 1673/1848

ISO IGRP Syntax Errors: 0

IS-IS: Level-1 Hellos (sent/rcvd): 0/0

IS-IS: Level-2 Hellos (sent/rcvd): 0/0

IS-IS: PTP Hellos (sent/rcvd): 0/0

IS-IS: Level-1 LSPs (sent/rcvd): 0/0

IS-IS: Level-2 LSPs (sent/rcvd): 0/0

IS-IS: Level-1 CSNPs (sent/rcvd): 0/0

IS-IS: Level-2 CSNPs (sent/rcvd): 0/0

IS-IS: Level-1 PSNPs (sent/rcvd): 0/0

IS-IS: Level-2 PSNPs (sent/rcvd): 0/0

IS-IS: Level-1 DR Elections: 0

IS-IS: Level-2 DR Elections: 0

IS-IS: Level-1 SPF Calculations: 0

IS-IS: Level-2 SPF Calculations: 0

Table 45 describes significant fields shown in the display.

Table 45 show clns traffic Field Descriptions 

Field	Description
CLNS & ESIS Output	Total number of packets that this router has sent.
Input	Total number of packets that this router has received.
CLNS Local	Lists the number of packets that were generated by this router.
Forward	Lists the number of packets that this router has forwarded.
CLNS Discards	Lists the packets that CLNS has discarded, along with the reason for the discard.
CLNS Options	Lists the options that have been seen in CLNS packets.
CLNS Segments	Lists the number of packets that have been segmented and the number of failures that occurred because a packet could not be segmented.
CLNS Broadcasts	Lists the number of CLNS broadcasts that have been sent and received.
Echos	Lists the number of echo request packets and echo reply packets that have been received. The line following this field lists the number of echo request packets and echo reply packets that have been sent.
ESIS (sent/rcvd)	Lists the number of ESH, ISH, and Redirects sent and received.
ISO IGRP	Lists the number of IGRP queries and updates sent and received.
Router Hellos	Lists the number of IGRP router hello packets that have been sent and received.
IS-IS: Level-1 hellos (sent/rcvd)	Lists the number of Level 1 IS-IS hello packets sent and received.
IS-IS: Level-2 hellos (sent/rcvd)	Lists the number of Level 2 IS-IS hello packets sent and received.
IS-IS: PTP hellos (sent/rcvd)	Lists the number of point-to-point IS-IS hello packets sent and received over serial links.
IS-IS: Level-1 LSPs (sent/rcvd)	Lists the number of Level 1 link-state PDUs sent and received.
IS-IS: Level-2 LSPs (sent/rcvd)	Lists the number of Level 2 link-state PDUs sent and received.
IS-IS: Level-1 CSNPs (sent/rcvd)	Lists the number of Level 1 CSNPs sent and received.
IS-IS: Level-2 CSNPs (sent/rcvd)	Lists the number of Level 2 CSNPs sent and received.
IS-IS: Level-1 PSNPs (sent/rcvd)	Lists the number of Level 1 PSNPs sent and received.
IS-IS: Level-2 PSNPs (sent/rcvd)	Lists the number of Level 2 PSNPs sent and received.
IS-IS: Level-1 DR Elections	Lists the number of times Level 1 designated router election occurred.
IS-IS: Level-2 DR Elections	Lists the number of times Level 2 designated router election occurred.
IS-IS: Level-1 SPF Calculations	Lists the number of times Level 1 shortest-path-first (SPF) tree was computed.
IS-IS: Level-2 SPF Calculations	Lists the number of times Level 2 SPF tree was computed.

show isis routes

To display the Intermediate System-to-Intermediate System (IS-IS) Level 1 forwarding table for IS-IS learned routes, use the show isis routes command in EXEC mode.

show isis area-tag routes

Syntax Description

area-tag

Required for multiarea IS-IS configuration. Optional for conventional IS-IS configuration. Meaningful name for a routing process. This name must be unique among all IP or Connectionless Network Service (CLNS) router processes for a given router. If an area tag is not specified, a null tag is assumed and the process is referenced with a null tag. If an area tag is specified, output is limited to the specified area.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Examples

The following is sample output from the show isis routes command:

Router# show isis routes

IS-IS Level-1 Routing Table - Version 34

System Id       Next-Hop        SNPA            Interface    Metric    State

0000.0C00.0C35  0000.0C00.0C35  0000.0c00.0c36  Ethernet1    20        Up

0800.2B16.24EA  0800.2B16.24EA  aa00.0400.2d05  Ethernet0    10        Up

0800.2B14.060E  0800.2B14.060E  aa00.0400.9205  Ethernet0    10        Up

0800.2B14.0528  0800.2B14.0528  aa00.0400.9105  Ethernet0    10        Up

0000.0C00.40AF  0000.0000.0000  --              --           0         Up

0000.0C00.62E6  0000.0C00.62E6  0000.0c00.62e7  Ethernet1    10        Up

AA00.0400.2D05  0800.2B16.24EA  aa00.0400.2d05  Ethernet0    10        Up

Table 46 describes significant fields shown in the display.

Table 46 show isis routes Field Descriptions 

Field	Description
Version 34	Indicates version number of the Level 1 routing table. All Level 1 routes with a version number that does not match this number are flushed from the routing table. The router's version number increments when the configuration changes from Level 1 or Level 1-2 to Level 2 only.
System Id	Identification value of the system listed in Level 1 forwarding table.
Next-Hop	System ID of best-cost next-hop to listed address.
SNPA	SNPA of next-hop system.
Interface	Interface through which next-hop system is known.
Metric	IS-IS metric for the route.
State	Up (active) or Down (nonoperational).

show route-map

To display all route maps configured or only the one specified, use the show route-map command in EXEC mode.

show route-map [map-name]

Syntax Description

map-name

(Optional) Name of a specific route map.

Command Modes

EXEC

Command History

Release	Modification
10.0	This command was introduced.

Examples

The following is sample output from the show route-map command:

Router# show route-map

route-map sid, permit, sequence 10

 Match clauses:

    tag 1 2

 Set clauses:

    metric 5

route-map sid, permit, sequence 20

 Match clauses:

    tag 3 4

 Set clauses:

    metric 6

Table 47 describes the fields shown in the display:

Table 47 show route-map Field Descriptions

Field	Description
route-map	Name of the route map.
permit	Indicates that the route is redistributed as controlled by the set actions.
sequence	Number that indicates the position a new route map is to have in the list of route maps already configured with the same name.
Match clauses:     tag	Match criteria—conditions under which redistribution is allowed for the current route map.
Set clauses:     metric	Set actions—the particular redistribution actions to perform if the criteria enforced by the match commands are met.

Related Commands

Command	Description
redistribute (ISO CLNS)	Redistributes routing information from one domain into another routing domain.
route-map (ISO CLNS)	Defines the conditions for redistributing routes from one routing protocol into another.

show tarp

To display all global TID Address Resolution Protocol (TARP) parameters, use the show tarp command in EXEC mode.

show tarp

Syntax Description

This command has no arguments or keywords.

Command Modes

EXEC

Command History

Release	Modification
11.1	This command was introduced.

Examples

The following is sample output from the show tarp command:

Router# show tarp 

Global TARP information:

  TID of this station is "cerd"

  Timer T1 (timer for response to TARP Type 1 PDU) is 15 seconds

  Timer T2 (timer for response to TARP Type 2 PDU) is 25 seconds

  Timer T3 (timer for response to ARP request) is 40 seconds

  Timer T4 (timer that starts when T2 expires) is 15 seconds

  Loop Detection Buffer entry timeout: 300 seconds

  TID cache entry timeout: 300 seconds

  This station will propagate TARP PDUs

  This station will originate TARP PDUs

  TID<->NET cache is enabled

  Sequence number that next packet originated by this station will have: 9

  Update remote cache (URC) bit is 0

  Packet lifetime: 100 hops

  Protocol type used in outgoing packets: "FE"

  N-Selector used in TARP PDU's: "AF"

Table 48 describes the fields shown in the display.

Table 48 show tarp Field Descriptions 

Field	Description
TID	Target identifier assigned to this router by the tarp tid command.
Timer T1	Number of seconds that the router will wait to receive a response from a Type 1 PDU. The T1 timer is set by the tarp t1-response-timer command.
Timer T2	Number of seconds that the router will wait to receive a response from a Type 2 PDU. The T2 timer is set by the tarp t2-response-timer command.
Timer T3	Number of seconds that the router will wait for a response from a Type 5 PDU. The T3 timer is set by the tarp arp-request-timer command.
Timer T4	Number of seconds that the router will wait for a response from a Type 2 PDU after the T2 timer has expired. The T4 timer is set by the tarp post-t2-response-timer command.
Loop Detection Buffer entry timeout	Number of seconds that a System ID-to-sequence number mapping entry remains in the loop-detection buffer table. The loop-detection buffer timeout is set by the tarp ldb-timer command.
TID cache entry timeout	Number of seconds that a dynamically created TARP entry remains in the TID cache. The cache timeout is set by the tarp cache-timer command.
Propagate TARP PDUs	Indicates whether the router can propagate TARP PDUs to its TARP neighbors. This field is set by the tarp global-propagate command.
Originate TARP PDUs	Indicates whether the router can originate TARP PDUs. This field is set by the tarp originate command.
TID<->NET cache	Indicates whether the router will store TID-to-network (NSAP) address mapping in cache. This field is set by the tarp allow-caching command.
Sequence number	Number used by the next packet to indicate if the packet is newer than the last information received. This number can be changed by the tarp sequence-number command.
Update remote cache	Indicates the setting of the URC bit in outgoing PDUs. When the bit is zero, the receiver of the PDU will update its cache entry. When the bit is one, the receiver of the PDU will not update its cache entry. This URC bit is set by the tarp urc command.
Packet lifetime	Number of hosts that a PDU can traverse before the PDU is discarded. The packet lifetime is set by the tarp lifetime command.
Protocol type	Hexadecimal representation of the protocol used in outgoing PDUs. The protocol type is set by the tarp protocol-type command. Only CLNP (indicated by FE) is supported.
N-selector	Hexadecimal representation of the N-selector used to indicate that the packet is a TARP PDU. The N-selector is set by the tarp nselector-type command. The default is AF.

show tarp blacklisted-adjacencies

To list all adjacencies that have been blacklisted (that is, adjacencies that this router will not propagate TARP PDUs to) by the tarp blacklist-adjacency command, use the show tarp blacklisted-adjacencies command in EXEC mode.

show tarp blacklisted-adjacencies

Syntax Description

This command has no arguments or keywords.

Command Modes

EXEC

Command History

Release	Modification
11.1	This command was introduced.

Examples

The following is sample output from the show tarp blacklisted-adjacencies command:

Router# show tarp blacklisted-adjacencies

Adjacencies that we won't propagate TARP PDU's to:

        49.0001.5555.5555.5555.00

Table 49 describes the field shown in the display.

Table 49 show tarp blacklisted adjacencies Field Descriptions

Field	Description
49.0001.5555.5555.5555.00	NSAP address of the blacklisted router.

Related Commands

Command	Description
tarp blacklist-adjacency	Blacklists the specified router so that the router does not receive TARP PDUs propagated by this router.