IP Routing Protocols Commands

Table Of Contents

IP Routing Protocols Commands

IP Routing Protocols Commands

This chapter describes the function and displays the syntax of each IP routing command. For more information about defaults and usage guidelines, see the corresponding chapter of the Router Products Command Reference publication.

[no] aggregate-address address mask [as-set] [summary-only]
[suppress-map map-name]

To create an aggregate entry in a BGP routing table, use the aggregate-address router configuration command. To disable this feature, use the no form of this command.

address

Aggregate address.

mask

Aggregate mask.

as-set

(Optional) Generate AS set path information.

summary-only

(Optional) Filter more specific routes from updates.

suppress-map map-name

(Optional) Name of route-map to suppress.

[no] area area-id authentication
no area area-id

To enable authentication for an OSPF area, use the area authentication router configuration command. To remove an area's authentication specificationor a specified area from the router's configuration, use the no form of this command.

area-id

Identifier of the area for which authentication is to be enabled. The identifier can be specified as either a decimal value or an IP address.

[no] area area-id default-cost cost

To specify a cost for the default summary route sent into a stub area, use the area default-cost router configuration command. To remove the assigned default route cost, use the no form of this command.

area-id

Identifier for the stub area. The identifier can be specified as either a decimal value or as an IP address.

cost

Cost for the default summary route used for a stub area. The acceptable value is a 24-bit number. The default cost is 1.

[no] area area-id range address mask

To consolidate and summarize routes at an area boundary, use the area range router configuration command. To disable this function, use the no form of this command.

area-id

Identifier of the area about which routes are to be summarized. It can be specified as either a decimal value or as an IP address.

address

IP address.

mask

IP mask.

[no] area area-id stub

To define an area as a stub area, use the area stub router configuration command. To disable this function, use the no form of this command.

area-id

Identifierfor the stub area. The identifier can be either a decimal value or an IP address.

[no] area area-id virtual-link router-id [hello-interval seconds]
[retransmit-interval seconds] [transmit-delay seconds]
[dead-interval seconds] [authentication-key password]

To define an OSPF virtual link, use the area virtual-link router configuration command with the optional parameters. To remove a virtual link, use the no form of this command.

area-id

Area ID assigned to the transit area for the virtual link. This can be either a decimal value or a valid IP address. There is no default.

router-id

Router ID associated with the virtual link neighbor. The router ID appears in the show ip ospf display. It is internally derived by each router from the router's interface IP addresses. This value must be entered in the format of an IP address. There is no default.

hello-interval

(Optional) Number of seconds between the hello packets that the router sends on an interface.

seconds

(Optional) Unsigned integer value to be advertised in the router's hello packets. The value must be the same for all routers attached to a common network. The default is 10 seconds.

retransmit-interval

(Optional) Number of seconds between link state advertisement retransmissions for adjacencies belonging to the interface.

seconds

(Optional) Expected round-trip delay between any two routers on the attached network. The value must be greater than the expected round-trip delay. The default is 5 seconds.

transmit-delay

(Optional) Estimated number of seconds it takes to transmit a link state update packet on the interface.

seconds

(Optional) Integer value that must be greater than zero. Link state advertisements in the update packet have their age incremented by this amount before transmission. The default value is 1 second.

dead-interval

(Optional) Number of seconds that a router's hello packets are not seen before its neighbors declare the router down.

seconds

(Optional) Unsigned integer value. The default is four times the hello interval. As with the hello interval, this value must be the same for all routers attached to a common network.

authentication-key

(Optional) Specific password to be used by neighboring routers.

password

(Optional) Any continuous string of characters, up to 8 bytes long, that you can enter from the keyboard. This string acts as a key that will allow the authentication procedure to generate or verify the authentication field in the OSPF header. This key is inserted directly into the OSPF header when originating routing protocol packets. A separate password can be assigned to each network on a per-interface basis. All neighboring routers on the same network must have the same password to be able to route OSPF traffic. There is no default value.

area-password [password]
no area-password [password]

To configure the IS-IS area authentication password, use the area-password router configuration command. To disable the password, use the no form of this command.

password

Password you assign

[no] auto-summary

To restore the default dehavior of automatic summarization of subnet routes into network-level routes, use the auto-summary router configuration command. To disable this feature, use the no form of this command.

[no] autonomous-system local-as

To specify the local autonomous system that the router resides in for EGP, use the autonomous-system global configuration command . To remove the autonomous system number, use the no form of this command.

local-as

Local autonomous system number to which the router belongs.

[no] bgp default local-preference value

To change the default local preference value, use the bgp default local-preference command. To return to the default setting, use the no form of this command.

value

Local preference value. Higher is more preferred. Integer from 0 through 4294967295.

[no] bgp fast-external-fallover

To immediately reset the BGP sessions of any directly adjacent external peers if the link used to reach them goes down, use the bgp fast-external-fallover router configuration command. To disable this feature, use the no form of this command.

clear ip bgp {* | address}

To reset a BGP connection, use the clear ip bgp EXEC command at the system prompt.

*

Resets all current BGP sessions.

address

Resets only the identified BGP neighbor.

clear ip eigrp neighbors [ip-address | interface]

To delete entries from the neighbor table, use the clear ip eigrp neighbors EXEC command.

ip-address

(Optional) Address of the neighbor.

interface

(Optional) Interface type and number. Specifying this argument removes from the neighbor table all entries learned via this interface.

clear ip igmp group [group-name | group-address | type number]

To delete entries from the IGMP cache, use the clear ip igmp group privileged EXEC command.

group-name

(Optional) Name of the multicast group, as defined in the DNS hosts table or with the ip host command.

group-address

(Optional) Address of the multicast group. This is a multicast IP address in four-part dotted notation.

type

(Optional) Interface type.

number

(Optional) Interface number.

clear ip mroute * | {group-name | group-address} [source-address]

To delete entries from the IP multicast routing table, use the clear ip mroute EXEC command.

*

Deletes all entries from the IP multicast routing table.

group-name

Name of the multicast group, as defined in the DNS hosts table or with the ip host command.

group-address

Address of the multicast group. This is a multicast IP address in four-part dotted notation.

source-address

(Optional) Address of a router that is a member of the multicast group. If you specify source-address, you must specify either group-name or group-address.

clear ip route {network [mask] | *}

To delete entries from the IP routing table, use the clear ip route EXEC command.

network

Network or subnet address to remove.

mask

(Optional) Subnet mask to remove.

*

Removes all routing table entries.

[no] default-information allowed {in | out} [route-map map-tag]

To control the redistribution of routing information between IGRP or Enhanced IGRP processes, use the default-information allowed router configuration command. To suppress IGRP or Enhanced IGRP exterior or default routes when they are received by an Enhanced IGRP process, use the no default-information allowed in command. To suppress IGRP or Enhanced IGRP exterior routes in updates, use the no default-information allowed out command.

in

Allows IGRP or Enhanced IGRP exterior or default routes to be received by an IGRP or Enhanced IGRP process.

out

Allows IGRP or Enhanced IGRP exterior routes to be advertised in updates.

route-map map-tag

(Optional) Indicates that the route map should be interrogated to filter the importation of routes from this source routing protocol to the current routing protocol. The argument map-tag is the identifier of a configured route map. If you specify route-map without specifying map-tag, no routes are imported. If you omit route-map, all routes are redistributed.

[no] default-information originate

To allow the redistribution of network 0.0.0.0 into BGP, use the default-information originate router configuration command. To disable this feature, use the no form of this command.

[no] default-information originate

To explicitly configure EGP to generate a default route, use the default-information originate router configuration command. To disable this feature, use the no form of this command.

[no] default-information originate [route-map map-name]

To generate a default route into an IS-IS routing domain, use the default-information originate router configuration command. To disable this feature, use the no form of this command.

originate

Originates the default route regardless of whether it resides in the routing table.

route-map map-name

(Optional) Routing process will generate the default route if the route-map is satisfied.

[no] default-information originate [always] [metric metric-value]
[metric-type type-value] {level-1 | level-1-2 | level-2}
[route-map map-name]

To generate a default route into an OSPF routing domain, use the default-information originate router configuration command. To disable this feature, use the no form of this command.

originate

For OSPF, causes the router to generate a default external route into an OSPF domain if the router already has a default route and you want to propagate to other routers. For IS-IS, originates the default route whether or not it resides in the routing table.

always

(Optional) For OSPF, the default route always will be advertised whether or not the router has a default route.

metric metric-value

(Optional) Metric used for generating the default route. If a value is not specified for this option, and no value is specified using the default-metric router configuration command, the default metric value is 1. The value used is specific to the protocol.

metric-type
type-value

(Optional) For OSPF, the external link type associated with the default route advertised into the OSPF routing domain. It can be one of two values:

1—Type 1 external route

2—Type 2 external route

If a metric-type is not specified, the router adopts a Type 2 external route.

For IS-IS, it can be one of two values:

internal—IS-IS metric which is < 63.

external—IS-IS metric which is > 64 < 128. The default is internal.

level-1

For IS-IS only, Level 1 routes are redistributed into other IP routing protocols independently. It specifies if IS-IS advertises network 0.0.0.0 into the Level 1 area.

level-1-2

For IS-IS only, both Level 1 and Level 2 routes are redistributed into other IP routing protocols. It specifies if IS-IS advertises network 0.0.0.0 into both levels in a single command.

level-2

For IS-IS only, Level 2 routes are redistributed into other IP routing protocols independently. It specifies if IS-IS advertises network 0.0.0.0 into the Level 2 subdomain.

route-map
map-name

(Optional) Routing process will generate the default route if the route-map is satisfied.

[no] default-metric number

To set default metric values for the BGP, EGP, OSPF, and RIP routing protocols, use this form of the default-metric router configuration command. To return to the default state, use the no form of this command.

number

Default metric value appropriate for the specified routing protocol

[no] default-metric bandwidth delay reliability loading mtu

To set metrics for IGRP or Enhanced IGRP, use this form of the default-metric router configuration command. To remove the metric value and return to the default state, use the no form of this command.

bandwidth

Minimum bandwidth of the route in kilobits per second. It can be 0 or any positive integer.

delay

Route delay in tens of microseconds. It can be 0 or any positive number that is a multiple of 39.1 nanoseconds.

reliability

Likelihood of successful packet transmission expressed as a number between 0 and 255. The value 255 means 100 percent reliability, and the value 0 means no reliability.

loading

Effective bandwidth of the route in kilobits per second. It can be a number from 0 to 255.

mtu

Minimum maximum transmission unit (MTU) size of the route in bytes. It can be 0 or any positive integer.

[no] distance weight [address mask [access-list-number]] [ip]

To define an administrative distance, use the distance router configuration command. To remove a distance definition, use the no form of this command.

weight

Administrative distance. This can be an integer from 10 to 255. (The values 0 through 9 are reserved for internal use.) Used alone, the argument weight specifies a default administrative distance that the router uses when no other specification exists for a routing information source. Routes with a distance of 255 are not installed in the routing table.

address

(Optional) IP address in four-part dotted notation.

mask

(Optional) IP address mask in four-part dotted-decimal format. A bit set to 1 in the mask argument instructs the router to ignore the corresponding bit in the address value.

access-list-number

(Optional) Number of a standard IP access list to be applied to incoming routing updates.

ip

(Optional) IP-derived routes for IS-IS. It can be applied independently for IP routes and ISO CLNS routes.

distance bgp external-distance internal-distance local-distance
no distance bgp

To allow the use of external, internal, and local administrative distances that could be a better route to a node, use the distance bgp router configuration command. To return to the default values, use the no form of this command.

external-distance

Administrative distance for BGP external routes. External routes are routes for which the best path is learned from a neighbor external to the autonomous system. Acceptable values are from 1 to 255. The default is 20. Routes with a distance of 255 are not installed in the routing table.

internal-distance

Administrative distance for BGP internal routes. Internal routes are those routes that are learned from another BGP entity within the same autonomous system. Acceptable values are from 1 to 255. The default is 200. A distance of 255 is the maximum possible distance, and any route with that distance will not be installed in the routing table.

local-distance

Administrative distance for BGP local routes. Local routes are those networks listed with a network router configuration command, often as back doors, for that router or for networks that are being redistributed from another process. Acceptable values are from 1 to 255. The default is 200. A distance of 255 is the maximum possible distance, and any route with that distance will not be installed in the routing table.

distance eigrp internal-distance external-distance
no distance eigrp
To allow the use of two administrative distances—internal and external—that could be a better route to a node, use the distance eigrp router configuration command. To reset these values to their defaults, use the no form of this command.

internal-distance

Administrative distance for IP Enhanced IGRP internal routes. Internal routes are those that are learned from another entity within the same autonomous system. It can be a value from 1 to 255.

external-distance

Administrative distance for IP Enhanced IGRP external routes. External routes are those for which the best path is learned from a neighbor external to the autonomous system. It can be a value from 1 to 255.

[no] distribute-list access-list-number in [interface-name]

To filter networks received in updates, use the distribute-list in router configuration command. To change or cancel the filter, use the no form of this command.

access-list-number

Standard IP access list number. The list explicitly specifies which networks are to be received and which are to be suppressed.

in

Applies the access list to incoming routing updates.

interface-name

(Optional) Interface on which the access list should be applied to incoming updates. If no interface is specified, the access list will be applied to all incoming updates.

[no] distribute-list access-list-number out [interface-name |
routing-process | autonomous-system-number]

To suppress networks from being advertised in updates, use the distribute-list out router configuration command. To cancel this function, use the no form of this command.

access-list-number

Standard IP access list number. The list explicitly specifies which networks are to be sent and which are to be suppressed in routing updates.

out

Applies the access list to outgoing routing updates.

interface-name

(Optional) Name of a particular interface.

routing-process

(Optional) Name of a particular routing process, or the keyword static or connected.

autonomous-system-number

(Optional) Autonomous system number.

[no] domain-password [password]

To configure the IS-IS routing domain authentication password, use the domain-password router configuration command. To disable a password, use the no form of this command.

password

Password you assign

[no] ip address address mask [secondary]

To specify the IP address on an interface, use the ip address interface configuration command. To remove an address, use the no form of this command.

address

IP address

mask

IP address mask

secondary

(Optional) Address to be added as a secondary address

[no] ip as-path access-list access-list-number {permit | deny}
as-regular-expression

To define a BGP-related access list, use the ip as-path access-list global configuration command. To disable use of the access list, use the no form of this command.

access-list-number

Integer from 1 to 199 that indicates the regular expression access list number.

permit

Permits access for matching conditions.

deny

Denies access to matching conditions.

as-regular-expression

Autonomous system in the access list using a regular expression. See the "Regular Expressions" appendix of the Router Products Command Reference publication for information about forming regular expressions.

[no] ip default-network network-number

To select a network as a candidate route for computing the gateway of last resort, use the ip default-network global configuration command. To remove a route, use the no form of this command.

network-number

Number of the network

[no] ip dvmrp accept-filter access-list-number [distance]

To configure an acceptance filter for incoming DVMRP reports, use the ip dvmrp accept-filter interface configuration command. To disable this feature, use the no form of this command.

access-list-number

Number of a standard IP access list. This can be a number from 0 to 99. A value of 0 means that all sources are accepted with the configured distance.

distance

(Optional) Administrative distance to the destination.

[no] ip dvmrp metric metric [access-list-number] [protocol process-id]

To configure the metric associated with a set of destinations for DVMRP reports, use the ip dvmrp metric interface configuration command. To disable this function, use the no form of this command.

metric

Metric associated with a set of destinations for DVMRP reports. It can be a value from 0 to 32. A value of 0 means that the route is not advertised. A value of 32 is equivalent to infinity (unreachable).

access-list-number

(Optional) Number of an access list. If you specify this argument, only the destinations that match the access list are reported with the configured metric. Any destinations not advertised because of split horizon do not use the configured metric.

protocol

(Optional) Name of unicast routing protocol. It can be bgp, egp, eigrp, igrp, isis, ospf, or rip. (Note that these are the protocol names you can specify with a router protocol command.)

If you specify these arguments, only routes learned by the specified routing protocol are advertised in DVMRP report messages.

If you omit these arguments, only directly connected networks are advertised when DVMRP neighbors are discovered.

process-id

(Optional) Process ID number of the unicast routing protocol.

ip gdp [priority number | reporttime seconds | holdtime seconds]
no ip gdp

To enable GDP routing on an interface, use the ip gdp interface configuration command. To disable GDP routing, use the no form of this command.

priority number

(Optional) Alters the GDP priority; default is a priority of 100. A larger number indicates a higher priority. The default is 100.

reporttime seconds

(Optional) Alters the GDP reporting interval; the default is 5 seconds for broadcast media such as Ethernets, and never for nonbroadcast media such as X.25. The default is 5 for broadcast media; 0 for nonbroadcast media.

holdtime seconds

(Optional) Alters the GDP default hold time of 15 seconds. The default is 15 seconds.

[no] ip hello-interval eigrp autonomous-system-number seconds

To configure the hello interval for the IP Enhanced IGRP routing process designated by an autonomous system number, use the ip hello-interval eigrp interface configuration command. To restore the default value, use the no form of this command.

autonomous-system-number

Autonomous system number

seconds

Hello interval, in seconds

[no] ip hold-time eigrp autonomous-system-number seconds

To configure the hold time for the IP Enhanced IGRP routing process designated by the autonomous system number, use the ip hold-time eigrp interface configuration command. To restore the default value, use the no form of this command.

autonomous-system-number

Autonomous system number

seconds

Hold time, in seconds

[no] ip igmp access-group access-list-number

To control the multicast groups that hosts on the subnet serviced on an interface can join, use the ip igmp access-group interface configuration command. To disable groups on an interface, use the no form of this command.

access-list-number

Number of a standard IP access list. This can be a number from 1 to 99.

[no] ip igmp join-group group-address

To have the router join a multicast group, use the ip igmp join-group interface configuration command. To cancel membership in a multicast group, use the no form of this command.

group-address

Address of the multicast group. This is a multicast IP address in four-part dotted notation.

ip igmp query-interval seconds
no ip igmp query-interval

To configure the frequency at which the router sends IGMP host-query messages, use the ip igmp query-interval interface configuration command. To return to the default frequency, use the no form of this command.

seconds

Frequency, in seconds, at which to transmit IGMP host-query messages. The can be a number from 0 to 65535. The default is 60 seconds.

ip irdp [multicast | holdtime seconds | maxadvertinterval seconds |
minadvertinterval seconds | preference number | address address
[number]]
no ip irdp

To enable ICMP Router Discovery Protocol (IRDP) processing on an interface, use the ip irdp interface configuration command. To disable IRDP routing, use the no form of this command.

multicast

(Optional) Use the multicast address (224.0.0.1) instead of IP broadcasts.

holdtime seconds

(Optional) Length of time in seconds advertisements are held valid. The default is three times the maxadvertinterval value. Must be greater than maxadvertinterval and cannot be greater than 9000 seconds.

maxadvertinterval seconds

(Optional) Maximum interval in seconds between advertisements. The default is 600 seconds.

minadvertinterval seconds

(Optional) Minimum interval in seconds between advertisements. The default is 0.75 times the maxadvertinterval. If you change the maxadvertinterval value, this value defaults to three-quarters of the new value.

preference number

(Optional) Router's preference value. The allowed range is -2³¹ to 2³¹. The default is 0. A higher value increases the router's preference level. You can modify a particular router so that it will be the preferred router to which others home. The default is 0.

address address [number]

(Optional) IP address (address) to proxy-advertise, and optionally, its preference value (number).

[no] ip multicast-routing

To enable IP multicast routing on the router, use the ip multicast-routing global configuration command. To disable IP multicast routing, use the no form of this command.

ip multicast-threshold ttl
no ip multicast-threshold [ttl]

To configure the time-to-live (TTL) threshold of packets being forwarded out an interface, use the ip multicast-threshold interface configuration command. To return to the default TTL threshold, use the no form of this command.

ttl

Time-to-live value, in hops. It can be a value from 0 to 255. The default value is 0, which means that all multicast packets are forwarded out the interface.

ip ospf authentication-key password
no ip ospf authentication-key

To assign a password to be used by neighboring routers that are using OSPF's simple password authentication, use the ip ospf authentication-key interface configuration command. To remove a previously assigned OSPF password, use the no ip form of this command.

password

Any continuous string of characters, up to 8 bytes long, that can be entered from the keyboard.

ip ospf cost cost
no ip cost

To explicitly specify the cost of sending a packet on an interface, use the ip ospf cost interface configuration command. To reset the path cost to the default value, use the no form of this command.

cost

Unsigned integer value expressed as the link state metric. It can be a value in the range 1 to 65535.

ip ospf dead-interval seconds
no ip ospf dead-interval

To set how long a router's Hello packets must not have been seen before its neighbors declare the router down, use the ip ospf dead-interval interface configuration command. To return to the default time, use the no form of this command.

seconds

Unsigned integer that specifies the interval in seconds; the value must be the same for all nodes on the network. The default is four times the interval set by the ip ospf hello-interval command.

ip ospf hello-interval seconds
no ip ospf hello-interval

To specify the interval between Hello packets that the router sends on the interface, use the ip ospf hello-interval interface configuration command. To return to the default time, use the no form of this command.

seconds

Unsigned integer that specifies the interval in seconds. The value must be the same for all nodes on a specific network. The default is 10 seconds.

[no] ip ospf-name-lookup

To configure OSPF to look up Domain Name System (DNS) names for use in all OSPF show EXEC command displays, use the ip ospf-name-lookup global configuration command. To disable this feature , use the no form of this command.

ip ospf network {broadcast | non-broadcast}
no ip ospf network

To configure the OSPF network type to a type other than the default for a given media, use the ip ospf network interface configuration command. To return to the default value, use the no form of this command.

broadcast

Sets the network type to broadcast.

non-broadcast

Sets the network type to nonbroadcast.

ip ospf priority number
no ip ospf priority

To configure the OSPF network type to a type other than the default for a given media, use the ip ospf network interface configuration command. To return to the default value, use the no form of this command.

number

8-bit unsigned integer that specifies the priority. The range is from 0 to 255. The default is 1.

ip ospf retransmit-interval seconds
no ip ospf retransmit-interval

To specify the number of seconds between link state advertisement retransmissions for adjacencies belonging to the interface, use the ip ospf retransmit-interval interface configuration command. The no form of this command resets the link state advertisement retransmission interval to the default value.

seconds

Time in seconds between retransmissions. It must be greater than the expected round-trip delay between any two routers on the attached network. The range is 1 to 65535 seconds. The default is 5 seconds.

ip ospf transmit-delay seconds
no ip ospf transmit-delay

To set the estimated time it takes to transmit a link state update packet on the interface, use the ip ospf transmit-delay interface configuration command. To return to the default value, use the no form of this command.

seconds

Time in seconds that it takes to transmit a link state update. It can be an integer in the range is 1 to 65535 seconds. The default is 1 second.

[no] ip pim {dense-mode | sparse-mode}

To enable IP multicast routing on an interface, use the ip pim interface configuration command. To disable the PIM multicast routing protocol on the interface, use the no form of this command.

dense-mode

Enables dense mode of operation.

sparse-mode

Enables sparse mode of operation.

ip pim query-interval seconds
no ip pim query-interval [seconds]

To configure the frequency of PIM router-query messages, use the ip pim query-interval interface configuration command. To return to the default interval, use the no form of this command.

seconds

Interval, in seconds, at which periodic PIM router-query messages are sent. It can be a number from 1 to 65535. The default is 30 seconds.

[no] ip pim rp-address ip-address [access-list-number]

To configure the address of a PIM rendezvous point (RP), use the ip pim rp-address global configuration command. To remove an RP address, use the no form of this command.

ip-address

IP address of a router to be a PIM RP. This is a unicast IP address in four-part dotted notation.

access-list-number

(Optional) Number of an access list that defines which RPs are members of the group. This is a standard IP access list. The number can be from 1 to 100.

ip route network [mask] {address | interface} [distance]
no ip route

To establish static routes, use the ip route global configuration command. To remove static routes, use the no form of this command.

network

IP address of the target network or subnet

mask

(Optional) Network mask that lets you mask network and subnetwork bits

address

IP address of the next hop that can be used to reach that network

interface

Network interface to use

distance

(Optional) An administrative distance

[no] ip router isis [tag]

To configure an IS-IS routing process for IP on an interface, use the ip router isis interface configuration command. To disable IS-IS for IP, use the no form of this command.

tag

(Optional) Defines a meaningful name for a routing process. If not specified, a null tag is assumed. It must be unique among all IP router processes for a given router. Use the same text for the argument tag as specified in the router isis global configuration command.

[no] ip split-horizon

To enable the split-horizon mechanism, use the ip split-horizon interface configuration command. To disable the split-horizon mechanism, use the no form of this command.

[no] ip split-horizon eigrp autonomous-system-number

To enable IP Enhanced IGRP split horizon, use the ip split-horizon eigrp interface configuration command. To disable split horizon, use the no form of this command.

autonomous-system-number

Autonomous system number

[no] ip summary-address eigrp autonomous-system-number address
mask

To configure a summary aggregate address for a specified interface, use the ip summary-address eigrp interface configuration command. To disable a configuration, use the no form of this command.

autonomous-system-number

Autonomous system number

address

IP summary aggregate address to apply to an interface

mask

Subnet mask

[no] is-type {level-1 | level-1-2 | level-2-only}

To configure the IS-IS level at which the router operates, use the is-type router configuration command. To reset the default value, use the no form of this command.

level-1

Router acts as a station router.

level-1-2

Router acts as both a station router and an area router. This is the default.

level-2-only

Router acts as an area router only.

isis circuit-type {level-1 | level-1-2 | level-2-only}
no isis circuit-type

To configure the type of adjancy, use the isis circuit-type interface configuration command. To reset the circuit type to Level l and Level 2, use the no form of this command.

level-1

A Level 1 adjacency may be established if there is at least one area address in common between this system and its neighbors.

level-1-2

A Level 1 and 2 adjacency is established if the neighbor is also configured as level-1-2 and there is at least one area in common. If there is no area in common, a Level 2 adjacency is established. This is the default.

level-2-only

A Level 2 adjacency is established if and only if the neighbor is configured exclusively to be a Level 2 router.

[no] isis csnp-interval seconds {level-1 | level-2}

To configure the IS-IS complete sequence number PDUs (CSNP) interval, use the isis csnp-interval interface configuration command. To restore the default value, use the no form of this command.

seconds

Interval of time between transmission of CSNPs on multiaccess networks. This interval only applies for the designated router. The default is 10 seconds.

level-1

Configures the interval of time between transmission of CSNPs for Level 1 independently.

level-2

Configures the interval of time between transmission of CSNPs for Level 2 independently.

isis hello-interval seconds {level-1 | level-2}
no isis hello-interval {level-1 | level-2}

To specify the length of time between Hello packets that the router sends, use the isis hello-interval interface configuration command. To restore the default value, use the no form of this command.

seconds

Unsigned integer value. A value three times the hello interval seconds is advertised as the holdtime in the hello packets transmitted. It must be the same for all routers attached to a common network. With smaller hello intervals, topological changes are detected faster, but there is more routing traffic. The default is 10 seconds.

level-1

Configures the hello interval for Level 1 independently. Use this on X.25, SMDS, and Frame Relay multiaccess networks.

level-2

Configures the hello interval for Level 2 independently. Use this on X.25, SMDS, and Frame Relay multiaccess networks.

isis metric default-metric [delay-metric [expense-metric [error-metric]]]
{level-1 | level-2}
no isis metric {level-1 | level-2}

To configure the metric for an interface, use the isis metric interface configuration command. To restore the default metric value, use the no form of this command.

default-metric

Metric used for the redistributed route. The default metric is used as a value for the IS-IS metric. This is the value assigned when there is no QOS routing performed. Only this metric is supported by Cisco routers. You can configure this metric for Level 1 and/or Level 2 routing. The range is from 0 to 63. The default value is 10.

delay-metric

Not supported.

expense-metric

Not supported.

error-metric

Not supported.

level-1

Router acts as a station router (Level 1) only.

level-2

Router acts as an area router (Level 2) only.

isis password password {level-1 | level-2}
no isis password {level-1 | level-2}

To configure the authentication password for an interface, use the isis password interface configuration command. To disable authentication for IS-IS, use the no form of this command.

password

Authentication password you assign for an interface.

level-1

Configures the authentication password for Level 1 independently. For Level 1 routing, the router acts as a station router only.

level-2

Configures the authentication password for Level 2 independently. For Level 2 routing, the router acts as an area router only.

isis priority value {level-1 | level-2}
no isis priority {level-1 | level-2}

To configure the priority of designated routers, use the isis priority interface configuration command. To reset the default priority, use the no form of this command.

value

Sets the priority of a router and is a number from 0 to 127. The default value is 64.

level-1

Sets the priority of a router for Level 1 independently.

level-2

Sets the priority of a router for Level 2 independently.

[no] isis retransmit-interval seconds

To configure the time between retransmission of IS-IS link-state PDU (LSP) retransmission for point-to-point links, use the isis retransmit-interval interface configuration command. To restore the default value, use the no form of this command.

seconds

Time in seconds between retransmission of IS-IS LSP retransmissions. It is an integer that should be greater than the expected round-trip delay between any two routers on the attached network. The default is 5 seconds.

[no] match as-path path-list-number

To match a BGP autonomous system path access list, use the match as-path route-map configuration command. To remove a path list entry, the no form of this command.

path-list-number

Autonomous system path access list. An integer from 1 through 199.

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

To distribute any routes that have their next hop out one of the interfaces specified, use the match interface route-map configuration command. To remove the match interface entry, use the no form of this command.

type

Interface type.

number

Interface number.

[no] match ip address access-list-number...access-list-number

To distribute any routes that have a destination network number address that is permitted by a standard access list, use the matc

address	Aggregate address.
mask	Aggregate mask.
as-set	(Optional) Generate AS set path information.
summary-only	(Optional) Filter more specific routes from updates.
suppress-map map-name	(Optional) Name of route-map to suppress.

area-id	Identifier for the stub area. The identifier can be specified as either a decimal value or as an IP address.
cost	Cost for the default summary route used for a stub area. The acceptable value is a 24-bit number. The default cost is 1.

area-id	Identifier of the area about which routes are to be summarized. It can be specified as either a decimal value or as an IP address.
address	IP address.
mask	IP mask.

area-id	Area ID assigned to the transit area for the virtual link. This can be either a decimal value or a valid IP address. There is no default.
router-id	Router ID associated with the virtual link neighbor. The router ID appears in the show ip ospf display. It is internally derived by each router from the router's interface IP addresses. This value must be entered in the format of an IP address. There is no default.
hello-interval	(Optional) Number of seconds between the hello packets that the router sends on an interface.
seconds	(Optional) Unsigned integer value to be advertised in the router's hello packets. The value must be the same for all routers attached to a common network. The default is 10 seconds.
retransmit-interval	(Optional) Number of seconds between link state advertisement retransmissions for adjacencies belonging to the interface.
seconds	(Optional) Expected round-trip delay between any two routers on the attached network. The value must be greater than the expected round-trip delay. The default is 5 seconds.
transmit-delay	(Optional) Estimated number of seconds it takes to transmit a link state update packet on the interface.
seconds	(Optional) Integer value that must be greater than zero. Link state advertisements in the update packet have their age incremented by this amount before transmission. The default value is 1 second.
dead-interval	(Optional) Number of seconds that a router's hello packets are not seen before its neighbors declare the router down.
seconds	(Optional) Unsigned integer value. The default is four times the hello interval. As with the hello interval, this value must be the same for all routers attached to a common network.
authentication-key	(Optional) Specific password to be used by neighboring routers.
password	(Optional) Any continuous string of characters, up to 8 bytes long, that you can enter from the keyboard. This string acts as a key that will allow the authentication procedure to generate or verify the authentication field in the OSPF header. This key is inserted directly into the OSPF header when originating routing protocol packets. A separate password can be assigned to each network on a per-interface basis. All neighboring routers on the same network must have the same password to be able to route OSPF traffic. There is no default value.

*	Resets all current BGP sessions.
address	Resets only the identified BGP neighbor.

ip-address	(Optional) Address of the neighbor.
interface	(Optional) Interface type and number. Specifying this argument removes from the neighbor table all entries learned via this interface.

group-name	(Optional) Name of the multicast group, as defined in the DNS hosts table or with the ip host command.
group-address	(Optional) Address of the multicast group. This is a multicast IP address in four-part dotted notation.
type	(Optional) Interface type.
number	(Optional) Interface number.

*	Deletes all entries from the IP multicast routing table.
group-name	Name of the multicast group, as defined in the DNS hosts table or with the ip host command.
group-address	Address of the multicast group. This is a multicast IP address in four-part dotted notation.
source-address	(Optional) Address of a router that is a member of the multicast group. If you specify source-address, you must specify either group-name or group-address.

network	Network or subnet address to remove.
mask	(Optional) Subnet mask to remove.
*	Removes all routing table entries.

in	Allows IGRP or Enhanced IGRP exterior or default routes to be received by an IGRP or Enhanced IGRP process.
out	Allows IGRP or Enhanced IGRP exterior routes to be advertised in updates.
route-map map-tag	(Optional) Indicates that the route map should be interrogated to filter the importation of routes from this source routing protocol to the current routing protocol. The argument map-tag is the identifier of a configured route map. If you specify route-map without specifying map-tag, no routes are imported. If you omit route-map, all routes are redistributed.

originate	Originates the default route regardless of whether it resides in the routing table.
route-map map-name	(Optional) Routing process will generate the default route if the route-map is satisfied.

originate	For OSPF, causes the router to generate a default external route into an OSPF domain if the router already has a default route and you want to propagate to other routers. For IS-IS, originates the default route whether or not it resides in the routing table.
always	(Optional) For OSPF, the default route always will be advertised whether or not the router has a default route.
metric metric-value	(Optional) Metric used for generating the default route. If a value is not specified for this option, and no value is specified using the default-metric router configuration command, the default metric value is 1. The value used is specific to the protocol.
metric-type type-value	(Optional) For OSPF, the external link type associated with the default route advertised into the OSPF routing domain. It can be one of two values: 1—Type 1 external route 2—Type 2 external route If a metric-type is not specified, the router adopts a Type 2 external route. For IS-IS, it can be one of two values: internal—IS-IS metric which is < 63. external—IS-IS metric which is > 64 < 128. The default is internal.
level-1	For IS-IS only, Level 1 routes are redistributed into other IP routing protocols independently. It specifies if IS-IS advertises network 0.0.0.0 into the Level 1 area.
level-1-2	For IS-IS only, both Level 1 and Level 2 routes are redistributed into other IP routing protocols. It specifies if IS-IS advertises network 0.0.0.0 into both levels in a single command.
level-2	For IS-IS only, Level 2 routes are redistributed into other IP routing protocols independently. It specifies if IS-IS advertises network 0.0.0.0 into the Level 2 subdomain.
route-map map-name	(Optional) Routing process will generate the default route if the route-map is satisfied.

bandwidth	Minimum bandwidth of the route in kilobits per second. It can be 0 or any positive integer.
delay	Route delay in tens of microseconds. It can be 0 or any positive number that is a multiple of 39.1 nanoseconds.
reliability	Likelihood of successful packet transmission expressed as a number between 0 and 255. The value 255 means 100 percent reliability, and the value 0 means no reliability.
loading	Effective bandwidth of the route in kilobits per second. It can be a number from 0 to 255.
mtu	Minimum maximum transmission unit (MTU) size of the route in bytes. It can be 0 or any positive integer.

weight	Administrative distance. This can be an integer from 10 to 255. (The values 0 through 9 are reserved for internal use.) Used alone, the argument weight specifies a default administrative distance that the router uses when no other specification exists for a routing information source. Routes with a distance of 255 are not installed in the routing table.
address	(Optional) IP address in four-part dotted notation.
mask	(Optional) IP address mask in four-part dotted-decimal format. A bit set to 1 in the mask argument instructs the router to ignore the corresponding bit in the address value.
access-list-number	(Optional) Number of a standard IP access list to be applied to incoming routing updates.
ip	(Optional) IP-derived routes for IS-IS. It can be applied independently for IP routes and ISO CLNS routes.

external-distance	Administrative distance for BGP external routes. External routes are routes for which the best path is learned from a neighbor external to the autonomous system. Acceptable values are from 1 to 255. The default is 20. Routes with a distance of 255 are not installed in the routing table.
internal-distance	Administrative distance for BGP internal routes. Internal routes are those routes that are learned from another BGP entity within the same autonomous system. Acceptable values are from 1 to 255. The default is 200. A distance of 255 is the maximum possible distance, and any route with that distance will not be installed in the routing table.
local-distance	Administrative distance for BGP local routes. Local routes are those networks listed with a network router configuration command, often as back doors, for that router or for networks that are being redistributed from another process. Acceptable values are from 1 to 255. The default is 200. A distance of 255 is the maximum possible distance, and any route with that distance will not be installed in the routing table.

internal-distance	Administrative distance for IP Enhanced IGRP internal routes. Internal routes are those that are learned from another entity within the same autonomous system. It can be a value from 1 to 255.
external-distance	Administrative distance for IP Enhanced IGRP external routes. External routes are those for which the best path is learned from a neighbor external to the autonomous system. It can be a value from 1 to 255.

access-list-number	Standard IP access list number. The list explicitly specifies which networks are to be received and which are to be suppressed.
in	Applies the access list to incoming routing updates.
interface-name	(Optional) Interface on which the access list should be applied to incoming updates. If no interface is specified, the access list will be applied to all incoming updates.

address	IP address
mask	IP address mask
secondary	(Optional) Address to be added as a secondary address

access-list-number	Integer from 1 to 199 that indicates the regular expression access list number.
permit	Permits access for matching conditions.
deny	Denies access to matching conditions.
as-regular-expression	Autonomous system in the access list using a regular expression. See the "Regular Expressions" appendix of the Router Products Command Reference publication for information about forming regular expressions.

access-list-number	Number of a standard IP access list. This can be a number from 0 to 99. A value of 0 means that all sources are accepted with the configured distance.
distance	(Optional) Administrative distance to the destination.

metric	Metric associated with a set of destinations for DVMRP reports. It can be a value from 0 to 32. A value of 0 means that the route is not advertised. A value of 32 is equivalent to infinity (unreachable).
access-list-number	(Optional) Number of an access list. If you specify this argument, only the destinations that match the access list are reported with the configured metric. Any destinations not advertised because of split horizon do not use the configured metric.
protocol	(Optional) Name of unicast routing protocol. It can be bgp, egp, eigrp, igrp, isis, ospf, or rip. (Note that these are the protocol names you can specify with a router protocol command.) If you specify these arguments, only routes learned by the specified routing protocol are advertised in DVMRP report messages. If you omit these arguments, only directly connected networks are advertised when DVMRP neighbors are discovered.
process-id	(Optional) Process ID number of the unicast routing protocol.

priority number	(Optional) Alters the GDP priority; default is a priority of 100. A larger number indicates a higher priority. The default is 100.
reporttime seconds	(Optional) Alters the GDP reporting interval; the default is 5 seconds for broadcast media such as Ethernets, and never for nonbroadcast media such as X.25. The default is 5 for broadcast media; 0 for nonbroadcast media.
holdtime seconds	(Optional) Alters the GDP default hold time of 15 seconds. The default is 15 seconds.

autonomous-system-number	Autonomous system number
seconds	Hello interval, in seconds

multicast	(Optional) Use the multicast address (224.0.0.1) instead of IP broadcasts.
holdtime seconds	(Optional) Length of time in seconds advertisements are held valid. The default is three times the maxadvertinterval value. Must be greater than maxadvertinterval and cannot be greater than 9000 seconds.
maxadvertinterval seconds	(Optional) Maximum interval in seconds between advertisements. The default is 600 seconds.
minadvertinterval seconds	(Optional) Minimum interval in seconds between advertisements. The default is 0.75 times the maxadvertinterval. If you change the maxadvertinterval value, this value defaults to three-quarters of the new value.
preference number	(Optional) Router's preference value. The allowed range is -2³¹ to 2³¹. The default is 0. A higher value increases the router's preference level. You can modify a particular router so that it will be the preferred router to which others home. The default is 0.
address address [number]	(Optional) IP address (address) to proxy-advertise, and optionally, its preference value (number).

broadcast	Sets the network type to broadcast.
non-broadcast	Sets the network type to nonbroadcast.

dense-mode	Enables dense mode of operation.
sparse-mode	Enables sparse mode of operation.

ip-address	IP address of a router to be a PIM RP. This is a unicast IP address in four-part dotted notation.
access-list-number	(Optional) Number of an access list that defines which RPs are members of the group. This is a standard IP access list. The number can be from 1 to 100.

network	IP address of the target network or subnet
mask	(Optional) Network mask that lets you mask network and subnetwork bits
address	IP address of the next hop that can be used to reach that network
interface	Network interface to use
distance	(Optional) An administrative distance

level-1	Router acts as a station router.
level-1-2	Router acts as both a station router and an area router. This is the default.
level-2-only	Router acts as an area router only.

level-1	A Level 1 adjacency may be established if there is at least one area address in common between this system and its neighbors.
level-1-2	A Level 1 and 2 adjacency is established if the neighbor is also configured as level-1-2 and there is at least one area in common. If there is no area in common, a Level 2 adjacency is established. This is the default.
level-2-only	A Level 2 adjacency is established if and only if the neighbor is configured exclusively to be a Level 2 router.