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Cisco IOS Switching Services Command Reference, Release 12.3
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Introduction
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Switching Commands: A through D
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Switching Commands: enabled through ip flow ingress
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Switching Commands: ip load-sharing through list
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Switching Commands: mac-address-table aging-time through mpls ip encapsulate explicit-null
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Switching Commands: mpls ip propagate-ttl through mpls request-labels for
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Switching Commands: mpls traffic-eng through name server-atm-address
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Switching Commands: neighbor activate through show cef timers
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Switching Commands: show controllers vsi control-interface through show ip cache verbose flow
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Switching Commands: show ip cef through show ip vrf
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Switching Commands: show isis database verbose through show show mls rp vtp-domain
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Switching Commands: show mpls atm-ldp bindings through show mpls traffic-eng link-management summary
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Switching Commands: show mpls traffic-eng topology through show tag-switching tdp bindings
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Switching Commands: show tag-switching tdp discovery through tag-switching tdp holdtime
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Switching Commands: tunnel flow egress-records through vtp v2-mode
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Table Of Contents
set mpls experimental imposition
show cef interface policy-statistics
neighbor activate
To enable the exchange of information with a Border Gateway Protocol (BGP) neighbor, use the neighbor activate command in address family configuration mode or router configuration mode. To disable the exchange of an address with a BGP neighbor, use the no form of this command.
neighbor {ip-address | peer-group-name | ipv6-address} activate
no neighbor {ip-address | peer-group-name | ipv6-address} activate
Syntax Description
Defaults
The exchange of addresses with BGP neighbors is enabled for the IPv4 address family. Enabling address exchange for all other address families is disabled.
Note
Address exchange for address family IPv4 is enabled by default for each BGP routing session configured with the neighbor remote-as command unless you configure the no bgp default ipv4-activate command before configuring the neighbor remote-as command, or you disable address exchange for address family IPv4 with a specific neighbor by using the no form of the neighbor activate command.
Command Modes
Address family configuration
Router configurationCommand History
Usage Guidelines
Use this command to advertise address information in the form of an IP or IPv6 prefix. The address prefix information is known as Network Layer Reachability Information (NLRI) in BGP.
Examples
The following example shows how to enable address exchange for address family vpnv4 for all neighbors in the BGP peer group named PEPEER and for the neighbor 144.0.0.44:
Router(config)# address-family vpnv4Router(config-router-af)# neighbor PEPEER activateRouter(config-router-af)# neighbor 144.0.0.44 activateRouter(config-router-af)# exit-address-familyThe following example shows how to enable address exchange for address family IPv4 unicast for all neighbors in the BGP peer group named group1 and for the BGP neighbor 172.16.1.1:
Router(config)# address-family ipv4 unicastRouter(config-router-af)# neighbor group1 activateRouter(config-router-af)# neighbor 172.16.1.1 activateThe following example shows how to enable address exchange for address family IPv6 for all neighbors in the BGP peer group named group2 and for the BGP neighbor 7000::2:
Router(config)# address-family ipv6Router(config-router-af)# neighbor group2 activateRouter(config-router-af)# neighbor 7000::2 activateRelated Commands
neighbor allowas-in
To configure provider edge (PE) routers to allow readvertisement of all prefixes containing duplicate autonomous system numbers (ASNs), use the neighbor allowas-in command in router configuration mode. To disable the readvertisement of the ASN of the PE router, use the no form of this command.
neighbor ip-address allowas-in [number]
no neighbor ip-address allowas-in [number]
Syntax Description
Defaults
Readvertisement of all prefixes containing duplicate ASNs is disabled by default.
Command Modes
Router configuration
Command History
Usage Guidelines
In a hub and spoke configuration, a PE router readvertises all prefixes containing duplicate autonomous system numbers. Use the neighbor allowas-in command to configure two VRFs on each PE router to receive and readvertise prefixes are as follows:
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You control the number of times an ASN is advertised by specifying a number from 1 to 10.
Examples
The following example shows how to configure the PE router with ASN 100 to allow prefixes from the VRF address family Virtual Private Network (VPN) IPv4 vrf1. The neighboring PE router with the IP address 192.168.255.255 is set to be readvertised to other PE routers with the same ASN six times.
Router(config)# router bgp 100Router(config-router)# address-family ipv4 vrf vrf1Router(config-router)# neighbor 192.168.255.255 allowas-in 6Related Commands
address-family
Enters the address family configuration submode used to configure routing protocols such as BGP, OSPF, RIP, and static routing.
neighbor as-override
To configure a provider edge (PE) router to override the autonomous system number (ASN) of a site with the ASN of a provider, use the neighbor as-override command in router configuration mode. To remove Virtual Private Network (VPN) IPv4 prefixes from a specified router, use the no form of this command.
neighbor ip-address as-override
no neighbor ip-address as-override
Syntax Description
Defaults
Automatic override of the ASN is disabled by default.
Command Modes
Router configuration
Command History
Usage Guidelines
This command is used in conjunction with the site-of-origin feature, identifying the site where a route originated, and preventing routing loops between routers within a VPN.
Examples
The following example shows how to configure a router to override the ASN of a site with the ASN of a provider:Router(config)# router bgp 100Router(config-router)# neighbor 192.168.255.255 remote-as 109Router(config-router)# neighbor 192.168.255.255 update-source loopback0Router(config-router)# address-family ipv4 vrf vpn1Router(config-router)# neighbor 192.168.255.255 activateRouter(config-router)# neighbor 192.168.255.255 as-overrideRelated Commands
neighbor send-label
To enable a Border Gateway Protocol (BGP) router to send Multiprotocol Label Switching (MPLS) labels with BGP routes to a neighboring BGP router, use the neighbor send-label command in address family configuration mode or router configuration mode. To disable the sending of MPLS labels with BGP routes, use the no form of this command.
neighbor ip-address send-label
no neighbor ip-address send-label
Syntax Description
Defaults
By default, BGP routers distribute only BGP routes.
Command Modes
Address family configuration
Router configurationCommand History
Usage Guidelines
This command enables a router to use BGP to distribute MPLS labels along with the IPv4 routes to a peer router. You must issue this command on both the local router and the neighboring router.
This command has the following restrictions:
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Use this command in IPv6 address family configuration mode to bind and advertise IPv6 prefix MPLS labels. Using this command in conjunction with the mpls ipv6 source-interface global configuration command allows IPv6 traffic to run over an IPv4 MPLS network without any software or hardware configuration changes in the backbone. Edge routers configured to run both IPv4 and IPv6 forward IPv6 traffic using MPLS and multiprotocol internal BGP (MP-iBGP).
Examples
The following example shows how to enable a router in the autonomous system 65000 to send MPLS labels with BGP routes to the neighbor BGP router at 192.168.0.1:
Router(config)# router bgp 65000Router(config-router)# neighbor 192.168.0.1 remote-as 65001Router(config-router)# neighbor 192.168.0.1 send-labelThe following example shows how to enable a router in the autonomous system 65000 to bind and advertise IPv6 prefix MPLS labels and send the labels with BGP routes to the neighbor BGP router at 192.168.99.70:
Router(config)# router bgp 65000Router(config-router)# neighbor 192.168.99.70 remote-as 65000Router(config-router)# address-family ipv6Router(config-router-af)# neighbor 192.168.99.70 activateRouter(config-router-af)# neighbor 192.168.99.70 send-labelRelated Commands
network-id
To specify the network ID of a Multiprotocol over ATM (MPOA) server (MPS), use the network-id command in MPS configuration mode. To revert to the default value (default value is 1), use the no form of this command.
network-id id
no network-id
Syntax Description
Defaults
The default value for the network ID is 1.
Command Modes
MPS configuration
Command History
Usage Guidelines
Specifies the network ID of this MPS. This value is used in a very similar way the NHRP network ID is used. It is for partitioning nonbroadcast multiaccess (NBMA) clouds artificially by administration.
Examples
The following example shows how to set the network ID to 5:
Router(mpoa-server-config)# network-id 5next-address
To specify the next IP address in the explicit path, use the next-address command in IP explicit path configuration mode. To remove the specified next IP address in the explicit path, use the no form of this command.
next-address A.B.C.D
no next-address A.B.C.D
Syntax Description
Defaults
Next IP address in the explicit path is not specified.
Command Modes
IP explicit path configuration
Command History
Examples
The following example shows how to assign the number 60 to the IP explicit path, enable the path, and specify 10.3.27.3 as the next IP address in the list of IP addresses:
Router(config)# ip explicit-path identifier 60 enableRouter(cfg-ip-expl-path)# next-address 10.3.27.3Explicit Path identifier 60:1: next-address 10.3.27.3Router(cfg-ip-exp1-path)#Related Commands
oam-ac emulation-enable
To enable Operation, Administration, and Maintenance (OAM) cell emulation on ATM adaptation layer 5 (AAL5) over Multiprotocol Label Switching (MPLS), use the oam-ac emulation-enable command in the ATM VC configuration mode on both provider edge (PE) routers. To disable OAM cell emulation, use the no form of this command on both routers.
oam-ac emulation-enable [ais-rate]
no oam-ac emulation-enable [ais-rate]
Syntax Description
Defaults
By default OAM cell emulation is disabled. If you enable OAM cell emulation without specifying an AIS rate, the default is to send one AIS cell every second.
Command Modes
ATM VC configuration mode
Command History
Usage Guidelines
This command is only applicable to AAL5 over MPLS and is not supported with ATM Cell Relay over MPLS.
This command is only available when you specify the pvc vpi/vci l2transport command.
Examples
The following example shows how to enable OAM cell emulation on an ATM PVC:
Router# interface ATM 1/0/0Router(config-if)# pvc 1/200 l2transport
Router(config-atm-vc)# oam-ac emulation-enableThe following example shows how to set the rate at which an AIS cell is sent to every 30 seconds:
Router (config-atm-vc)# oam-ac emulation-enable 30Related Commands
rd
To create routing and forwarding tables for a Virtual Private Network (VPN) routing/forwarding instance (VRF), use the rd command in VRF configuration mode.
rd route-distinguisher
Syntax Description
Defaults
There is no default. A route distinguisher (RD) must be configured for a VRF to be functional.
Command Modes
VRF configuration
Command History
Usage Guidelines
A RD creates routing and forwarding tables and specifies the default route distinguisher for a VPN. The RD is added to the beginning of the customer's IPv4 prefixes to change them into globally unique VPN-IPv4 prefixes.
Either RD is an ASN-relative RD, in which case it is composed of an autonomous system number and an arbitrary number, or it is an IP-address-relative RD, in which case it is composed of an IP address and an arbitrary number.
You can enter an RD in either of these formats:
16-bit AS number: your 32-bit number
For example, 101:3.32-bit IP address: your 16-bit number
For example, 192.168.122.15:1.Examples
The following example shows how to configure a default RD for two VRFs. It illustrates the use of both AS-relative and IP-address-relative RDs:
Router(config)# ip vrf vrf_blueRouter(config-vrf)# rd 100:3Router (config-vrf)# exitRouter(config)# ip vrf vrf_redRouter(config-vrf)# rd 173.13.0.12:200Related Commands
Configures a VRF routing table.
Displays the set of defined VRFs and associated interfaces.
route-target
To create a route-target extended community for a Virtual Private Network (VPN) routing/forwarding instance (VRF), use the route-target command in VRF configuration mode. To disable the configuration of a route-target community option, use the no form of this command.
route-target {import | export | both} route-target-ext-community
no route-target {import | export | both} route-target-ext-community
Syntax Description
Defaults
There are no defaults. A VRF has no route-target extended community attributes associated with it until specified by the route-target command.
Command Modes
VRF configuration
Command History
Usage Guidelines
The route-target command creates lists of import and export route-target extended communities for the specified VRF. Enter the command one time for each target community. Learned routes that carry a specific route-target extended community are imported into all VRFs configured with that extended community as an import route target. Routes learned from a VRF site (for example, by Border Gateway Protocol (BGP), Routing Information Protocol (RIP), or static route configuration) contain export route targets for extended communities configured for the VRF added as route attributes to control the VRFs into which the route is imported.
The route target specifies a target VPN extended community. Like a route-distinguisher, an extended community is composed of either an autonomous system number and an arbitrary number or an IP address and an arbitrary number. You can enter the numbers in either of these formats:
16-bit AS number:your 32-bit number
For example, 101:3.32-bit IP address:your 16-bit number
For example, 192.168.122.15: 1.Examples
The following example shows how to configure route-target extended community attributes for a VRF. The result of the command sequence is that VRF named vrf_blue has two export extended communities (1000:1 and 1000:2) and two import extended communities (1000:1 and 173.27.0.130:200).
Router(config)# ip vrf vrf_blueRouter(config-vrf)# route-target both 1000:1Router(config-vrf)# route-target export 1000:2Router(config-vrf)# route-target import 173.27.0.130:200Related Commands
set mpls experimental
The set mpls experimental command is replaced by the set mpls experimental imposition command. See the set mpls experimental imposition command for more information.
set mpls experimental imposition
To set the value of the Multiprotocol Label Switching (MPLS) experimental (EXP) field on all imposed label entries, use the set mpls experimental imposition command in QoS policy-map class configuration mode. To disable the setting, use the no form of this command.
set mpls experimental imposition {mpls-exp-value | from-field [table table-map-name]}
no set mpls experimental imposition {mpls-exp-value | from-field [table table-map-name]}
Syntax Description
Defaults
No MPLS EXP value is set.
Command Modes
QoS policy-map class configuration
Command History
Usage Guidelines
The set mpls experimental imposition command is supported only on input interfaces. Use this command during label imposition. This command sets the MPLS EXP field on all imposed label entries.
Using This Command with the Enhanced Packet Marking Feature
If you are using this command as part of the Enhanced Packet Marking feature, you can use this command to specify the "from-field" packet-marking category to be used for mapping and setting the class of service (CoS) value. The "from-field" packet-marking categories are as follows:
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If you specify a "from-field" category but do not specify the table keyword and the applicable table-map-name argument, the default action will be to copy the value associated with the "from-field" category as the MPLS EXP imposition value. For instance, if you configure the set mpls experimental imposition precedence command, the precedence value will be copied and used as the MPLS EXP imposition value.
You can configure the set mpls experimental imposition dscp command, and the DSCP value will be copied and used as the MPLS EXP imposition value.
Note
Examples
The following example shows how to set the MPLS EXP value to 3 on all imposed label entries:
Router(config-pmap)# set mpls experimental imposition 3
The following example shows how to create the policy map named policy1 to use the packet-marking values defined in a table map named table-map1. The table map was created earlier with the table-map (value mapping) command. For more information about the table-map (value mapping) command, see the table-map (value mapping) command page.
The following example sets the MPLS EXP imposition value according to the DSCP value defined in table-map1.
Router(config)# policy-map policy1 Router(config-pmap)# class class-default Router(config-pmap-c)# set mpls experimental imposition dscp table table-map1Router(config-pmap-c)# exitRelated Commands
set mpls experimental topmost
To set the Multiprotocol Label Switching (MPLS) experimental (EXP) field value in the topmost label on either an input or an output interface, use the set mpls experimental topmost command in QoS policy-map class configuration mode. To disable the setting, use the no form of this command.
set mpls experimental topmost {mpls-exp-value | qos-group [table table-map-name]}
no set mpls experimental topmost {mpls-exp-value | qos-group [table table-map-name]}
Syntax Description
Defaults
No MPLS EXP value is set.
Command Modes
QoS policy-map class configuration
Command History
Usage Guidelines
This command sets the MPLS EXP value only in the topmost label. This command does not affect an IP packet. The MPLS field in the topmost label header is not changed.
Using This Command with the Enhanced Packet Marking Feature
If you are using this command as part of the Enhanced Packet Marking feature, you can use this command to specify the qos-group packet-marking category to be used for mapping and setting the differentiated services code point (DSCP) value.
If you specify the qos-group category but do not specify the table keyword and the applicable table-map-name argument, the default action will be to copy the value associated with the qos-group category as the MPLS EXP topmost value. For instance, if you configure the set mpls experimental topmost qos-group command, the QoS group value will be copied and used as the MPLS EXP topmost value.
The valid value range for the MPLS EXP topmost value is a number from 0 to 7. The valid value range for the QoS group is a number from 0 to 99. Therefore, when configuring the set mpls experimental topmost qos-group command, note the following points:
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Examples
The following example shows how to set the MPLS EXP value to 3 in the topmost label of an input or output interface:
Router(config-pmap)# set mpls experimental topmost 3The following example shows how to create the policy map named policy1 to use the packet-marking values defined in a table map named table-map1. The table map was created earlier with the table-map (value mapping) command. For more information about the table-map (value mapping) command, see the table-map (value mapping) command page.
The following example shows how to set the MPLS EXP value according to the QoS group value defined in table-map1.
Router(config)# policy-map policy1Router(config-pmap)# class class-defaultRouter(config-pmap-c)# set mpls experimental topmost qos-group table table-map1Router(config-pmap-c)# exitRelated Commands
set mpls-label
To enable a route to be distributed with a Multiprotocol Label Switching (MPLS) label if the route matches the conditions specified in the route map, use the set mpls-label command in route map configuration mode. To disable this function, use the no form of this command.
set mpls-label
no set mpls-label
Syntax Description
This command has no arguments or keywords.
Defaults
No route with an MPLS label is distributed.
Command Modes
Route map configuration
Command History
Usage Guidelines
This command can be used only with the neighbor route-map out command to manage outbound route maps for a Border Gateway Protocol (BGP) session.
Use the route-map global configuration command with match and set route-map configuration commands 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.
Examples
The following example shows how to create a route map that enables the route to be distributed with a label if the IP address of the route matches an IP address in ACL 1.
Router(config-router)# route-map incoming permit 10Router(config-route-map)# match ip address 1Router(config-route-map)# set mpls-labelRelated Commands
set ospf router-id
To set a separate Open Shortest Path First (OSPF) router ID for each interface or subinterface on a provider edge (PE) router for each directly attached customer edge (CE) router, use the set ospf router-id command in route-map configuration mode.
set ospf router-id
Syntax Description
This command has no arguments or keywords.
Defaults
Open Shortest Path First (OSPF) router ID is not set.
Command Modes
Route-map configuration
Command History
Usage Guidelines
To use this command, you must enable OSPF and create a routing process.
Examples
The following example shows how to match the PE router IP address 192.168.0.0 against the interface in access list 1 and set to the OSPF router ID:
router ospf 2 vrfvpn1-site1redistribute bgp 100 metric-type 1 subnetsnetwork 202.0.0.0 0.0.0.255 area 1router bgp 100neighbor 172.19.89. 62 remote-as 100access-list 1 permit 192.168.0.0route-map vpn1-site1-map permit 10match ip address 1set ospf router-idRelated Commands
router ospf
Enables OSPF routing, which places the router in router configuration mode.
set port flowcontrol
To set the receive flow-control value for a particular Gigabit Ethernet switching module port, use the set port flowcontrol command in privileged EXEC mode. To reset the receive flow-control value to the default, use the no form of this command.
set port flowcontrol {receive | send} [module-number | port-number] {off | on | desired}
no set port flowcontrol {receive | send} [module-number | port-number] {off | on | desired}
Syntax Description
Defaults
receive—off
send—desiredDefault on multiplexed ports is on. The exception to these defaults applies to the 18-port Gigabit Ethernet switching module. For this module, the defaults are shown below:
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Command Modes
Privileged EXEC
Command History
12.2(11)T
This command was introduced and implemented on the Cisco 2600 series, Cisco 3600 series, and Cisco 3700 series routers
Usage Guidelines
This command is supported on Gigabit Ethernet switching modules only.
Examples
The following examples show how to use the set port flowcontrol command set.
The following example show how to set the port 5/1 flow-control receive administration status to on (port requires far end to send flowcontrol packets):
Router# set port flowcontrol receive 5/1 on
The following example show how to set the port 5/1 flow-control receive administration status to desired (port allows far end to send flowcontrol packets if far end supports it):
Router# set port flowcontrol receive 5/1 desired
The following example show how to set the port 5/1 flow-control receive administration status to off (port does not allow far end to send flowcontrol packets):
Router# set port flowcontrol receive 5/1 off
The following example show how to set port 5/1 flow-control send administration status o on (port sends flowcontrol packets to far end):
Router# set port flowcontrol send 5/1 on
The following example show how to set port 5/1 flow-control send administration status to desired (port sends flowcontrol packets to far end if far end supports it):
Router# set port flowcontrol send 5/1 desired
The following example show how to set port 5/1 flow-control send administration status to off (port does not send flowcontrol packets to far end):
Router# set port flowcontrol send 5/1 off
Related Commands
set vlan
To group ports into a virtual LAN (VLAN), use the set vlan command in privileged EXEC mode.
set vlan vlan-number module/port
set vlan vlan-number [name name] [type {ethernet | fddi | fddinet | trcrf | trbrf}]
[state {active | suspend}] [said said] [mtu mtu] [ring hex-ring-number]
[decring decimal-ring-number] [bridge bridge-number] [parent vlan-number] [mode {srt |
srb}] [stp {ieee | ibm | auto}] [translation vlan-number] [backupcrf {off | on}]
[aremaxhop hop-count] [stemaxhop hop-count]Syntax Description
Defaults
The default configuration has all switched Ethernet ports and Ethernet repeater ports in VLAN 1. The default SAID is 100001 for VLAN 1, 100002 for VLAN 2, 100003 for VLAN 3, and so on. The default type is Ethernet. The default MTU is 1500 bytes. The default state is active.
The default TRBRF is 1005, the default TRCRF is 1003, and the default MTU for TRBRFs and TRCRFs is 4472. The default state is active. The default aremaxhop is 7; the default stemaxhop is 7.
Command Modes
Privileged EXEC
Usage Guidelines
You cannot use the set vlan command until the networking device is either in VTP transparent mode or until a VTP domain name has been set.
Valid MTU values for Token Ring VLAN are 1500 or 4472. While you can enter any value for the MTU value, the value you enter defaults to the next lowest valid value.
You cannot set multiple VLANs for Inter-Switch Link (ISL) ports using this command. The VLAN name can be from 1 to 32 characters in length. If adding a new VLAN, the VLAN number must be within the range 2 to 1001. When modifying a VLAN, the valid range for the VLAN number is 2 to 1005.
On a new Token Ring VLAN, if you do not specify the parent parameter for a TRCRF, the default TRBRF (1005) is used.
Examples
The following example shows how to set VLAN 850 to include ports 4 through 7 on module 3. Because ports 4 through 7 were originally assigned to TRCRF 1003, the message reflects the modification of VLAN 1003.
Router# set vlan 850 3/4-7VLAN 850 modified.VLAN 1003 modified.VLAN Mod/Ports---- -----------------------850 3/4-7Related Commands
clear vlan
Deletes an existing VLAN from a management domain.
show vlans
Displays VLAN subinterfaces.
set vlan mapping
To map 802.1Q virtual LANs (VLANs) to Inter-Switch Link (ISL) VLANs, use the set vlan mapping command in privileged EXEC mode.
set vlan mapping dot1q 1q-vlan-number isl isl-vlan-number
Syntax Description
Defaults
No 802.1Q-to-ISL mappings are defined.
Command Modes
Privileged EXEC
Usage Guidelines
IEEE 802.1Q VLAN trunks support VLANs 1 through 4095. ISL VLAN trunks support VLANs 1 through 1000. The switch automatically maps 802.1Q VLANs 1000 and lower to ISL VLANs with the same number.
The native VLAN of the 802.1Q trunk cannot be used in the mapping.
Use this feature to map 802.1Q VLANs above 1000 to ISL VLANs. Note that if you map a 802.1Q VLAN over 1000 to an ISL VLAN, the corresponding 802.1Q VLAN will be blocked. For example, if you map 802.1Q VLAN 2000 to ISL VLAN 200, then 802.1Q VLAN 200 will be blocked.
You can map up to seven VLANs. Only one 802.1Q VLAN can be mapped to an ISL VLAN. For example, if 802.1Q VLAN 800 has been automatically mapped to ISL VLAN 800, do not manually map any other 802.1Q VLANs to ISL VLAN 800.
You cannot overwrite existing 802.1Q VLAN mapping. If the 802.1Q VLAN number is in the mapping table, the command is aborted. You must first clear that mapping.
If vlan-number does not exist, then either of the following occurs:
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•
If the table is full, the command is aborted with an error message indicating the table is full.
Examples
The following example shows how to map VLAN 1022 to ISL VLAN 850:
Router# set vlan mapping dot1q 1022 isl 850Vlan 850 configuration successfulVlan mapping successfulThe following example shows the display if you enter a VLAN that does not exist:
Router# set vlan mapping dot1q 1017 isl 999Vlan mapping successfulWarning: vlan 999 non-existentVlan 999 configuration successfulThe following example shows the display if you enter an existing mapping:
Router# set vlan mapping dot1q 1033 isl 722722 exists in the mapping table. Please clear the mapping first.The following example shows the display if the mapping table is full:
Router# set vlan mapping dot1q 1099 isl 917Vlan Mapping Table Full.Related Commands
clear vlan mapping
Deletes existing 802.1Q VLAN to ISL VLAN-mapped pairs.
show vlans
Displays VLAN subinterfaces.
shortcut-frame-count
To specify the maximum number of times a packet can be routed to the default router within shortcut-frame time before a Multiprotocol over ATM (MPOA) resolution request is sent, use the shortcut-frame-count command in MPC configuration mode. To restore the default shortcut-setup frame count value, use the no form of this command.
shortcut-frame-count count
no shortcut-frame-count
Syntax Description
Defaults
The default is 10 frames.
Command Modes
MPC configuration
Command History
Examples
The following example shows how to set the shortcut-setup frame count to 5 for the MPC:
Router(mpoa-client-config)# shortcut-frame-count 5Related Commands
shortcut-frame-time
To set the shortcut-setup frame time (in seconds) for the Multiprotocol over ATM (MPOA) client (MPC), use the shortcut-frame-time command in MPC configuration mode. To restore the default shortcut-setup frame-time value, use the no form of this command.
shortcut-frame-time time
no shortcut-frame-time
Syntax Description
Defaults
The default is 1 second.
Command Modes
MPC configuration
Command History
Examples
The following example shows how to set the shortcut-setup frame time to 7 for the MPC:
Router(mpoa-client-config)# shortcut-frame-time 7Related Commands
show adjacency
To display Cisco Express Forwarding (CEF) adjacency table information, use the show adjacency command in user EXEC or privileged EXEC mode.
show adjacency [type number] [detail] [summary]
Syntax Description
Command Modes
Exec EXEC
Privileged EXECCommand History
Usage Guidelines
This command is used to verify that an adjacency exists for a connected device, that the adjacency is valid, and that the MAC header rewrite string is correct.
Examples
The following is sample output from the show adjacency detail command:
Router# show adjacency detailProtocol Interface AddressIP Serial5/0/0/1:1 point2point(7)0 packets, 0 bytes0F000800CEF expires: 00:02:09refresh: 00:00:09Epoch: 14IP Serial5/0/1/1:1 point2point(7)0 packets, 0 bytes0F000800CEF expires: 00:02:09refresh: 00:00:09Epoch: 14The following is sample output from the show adjacency summary command:
Router# show adjacency summaryAdjacency Table has 2 adjacenciesTable epoch: 14 (2 entries at this epoch)Interface Adjacency CountSerial5/0/0/1:1 1Serial5/0/1/1:1 1Table 3 describes the significant fields shown in the displays.
Related Commands
show cable bundle
To display the forwarding table for the specified interface, use the show cable bundle command in privileged EXEC mode.
show cable bundle bundle-number forwarding-table
Syntax Description
bundle-number
Specifies the bundle identifier. Valid range is from 1 to 255.
forwarding-table
Displays the forwarding table for the specified interface.
Command Modes
Privileged EXEC
Command History
Examples
In the following example, a cable bundle of 25 is specified:
Router# show cable bundle 25 forwarding-tableMAC address Interface0050.7366.17ab Cable3/00050.7366.1803 Cable3/00050.7366.1801 Cable3/0Table 4 describes the significant fields shown in the display.
Table 4 show cable bundle Field Descriptions
MAC address
Media Access Control ID for each interface in the bundle.
Interface
The cable interface slot and port number.
Related Commands
show cef drop
To display a list of which packets each line card dropped, use the show cef drop command in user EXEC or privileged EXEC mode.
show cef drop
Syntax Description
This command has no arguments or keywords.
Command Modes
User EXEC
Privileged EXECCommand History
Usage Guidelines
A line card might drop packets because of encapsulation failure, absence of route information, or absence of adjacency information.
A packet is sent to a different switching path (punted) because CEF does not support the encapsulation or feature, the packet is destined for the router, or the packet has IP options, such as time stamp and record route. IP options are process switched.
Note
Examples
The following is sample output from the show cef drop command:
Router# show cef dropCEF Drop StatisticsSlot Encap_fail Unresolved Unsupported No_route No_adj ChksumErrRP 4 89 0 4 0 01 0 0 0 0 0 02 0 0 5 0 0 5IPv6 CEF Drop StatisticsSlot Encap_fail Unresolved Unsupported No_route No_adjRP 2 33 0 2 01 0 0 3 0 02 0 0 0 0 0Table 5 describes the significant fields shown in the display.
Related Commands
show cef interface
Displays CEF-related interface information.
show ipv6 cef
Displays entries in the IPv6 FIB.
show cef events
To display a list of events internal to the CEF process, use the show cef events command in user EXEC or privileged EXEC mode.
show cef events
Syntax Description
This command has no arguments or keywords.
Command Modes
User EXEC
Privileged EXECCommand History
Examples
The following is sample output from the show cef events command:
Router# show cef eventsCEF events (14/0 recorded/ignored)Time Event Details+00:00:00.000 SubSys ipfib init+00:00:00.000 SubSys ipfib_ios init+00:00:00.000 SubSys ipfib_util init+00:00:00.000 SubSys adj_ios init+00:00:00.000 SubSys ipfib_les init+00:00:01.272 Flag FIB enabled set to yes+00:00:01.272 Flag FIB switching enabled set to yes+00:00:01.272 GState CEF enabled+00:00:02.872 Process Background created+00:00:02.872 Flag FIB running set to yes+00:00:02.872 Process Background event loop enter+00:00:02.912 Flag FIB switching running set to yes+00:00:02.920 Process Scanner created+00:00:02.920 Process Scanner event loop enterTable 6 describes the significant fields shown in the display.
Table 6 show cef events Field Descriptions
Time
Time that the event occurred.
Event
Type of event that occurred.
Details
Detailed description of the event.
Related Commands
Displays a list of which packets each line card dropped.
Displays CEF-related interface information.
Displays CEF-related interface information by line card.
show cef interface
To display detailed Cisco Express Forwarding (CEF) information for all interfaces, use the show cef interface command in user EXEC or privileged EXEC mode.
show cef interface [type number] [statistics] [detail]
Syntax Description
Command Modes
User EXEC
Privileged EXECCommand History
Usage Guidelines
You can use this command to display the detailed CEF status for all of the interfaces.
Values entered for the type and number arguments display CEF status information for the specified interface type and number.
Examples
The following is sample output from the show cef interface detail command for Ethernet interface 1/0/0:
Router# show cef interface Ethernet 1/0/0 detailEthernet1/0/0 is up (if_number 9)Corresponding hwidb fast_if_number 9Corresponding hwidb firstsw->if_number 9Internet address is 10.2.61.8/24ICMP redirects are always sentPer packet load-sharing is disabledIP unicast RPF check is disabledInbound access list is not setOutbound access list is not setIP policy routing is disabledHardware idb is Ethernet1/0/0Fast switching type 1, interface type 5IP Distributed CEF switching enabledIP Feature Fast switching turbo vectorIP Feature CEF switching turbo vectorInput fast flags 0x0, Output fast flags 0x0ifindex 7(7)Slot 1 Slot unit 0 VC -1Transmit limit accumulator 0x48001A82 (0x48001A82)IP MTU 1500The following is sample output from the show cef interface Null 0 detail command:
Router# show cef interface Null 0 detailNull0 is up (if_number 1)Corresponding hwidb fast_if_number 1Corresponding hwidb firstsw->if_number 1Internet Protocol processing disabledInterface is marked as nullidbPackets switched to this interface on linecard are dropped to next slow pathHardware idb is Null0Fast switching type 13, interface type 0IP CEF switching enabledIP Feature CEF switching turbo vectorInput fast flags 0x0, Output fast flags 0x0ifindex 0(0)Slot -1 Slot unit -1 VC -1Transmit limit accumulator 0x0 (0x0)IP MTU 1500Table 7 describes the significant fields shown in the displays.
Related Commands
show cef drop
Displays a list of which packets each line card dropped.
show cef linecard
Displays CEF-related interface information by line card.
show cef interface policy-statistics
To display detailed Cisco Express Forwarding (CEF) policy statistical information for all interfaces, use the show cef interface policy-statistics command in user EXEC or privileged EXEC mode.
show cef interface [type number] policy-statistics
Syntax Description
Command Modes
User EXEC
Privileged EXECCommand History
Usage Guidelines
This command is available only on distributed switching platforms.
The type and number arguments display CEF status information for the specified interface type and number.
Examples
The following is sample output from the show cef interface policy-statistics command:
Router# show cef interface policy-statisticsPOS7/0 is up (if_number 8)Index Packets Bytes1 0 02 0 03 50 50004 100 100005 100 100006 10 10007 0 08 0 0The following is sample output from the show cef interface policy-statistics command showing policy statistics for Ethernet interface 1/0:
Router# show cef interface ethernet 1/0 policy-statisticsEthernet1/0 is up (if_number 3)Corresponding hwidb fast_if_number 3Corresponding hwidb firstsw->if_number 3Index Packets Bytes1 0 02 0 03 0 04 0 05 0 06 0 07 0 08 0 0Table 8 describes the significant fields shown in the display.
Related Commands
show cef drop
Displays a list of which packets each line card dropped.
show cef linecard
Displays CEF-related interface information by line card.
show cef linecard
To display Cisco Express Forwarding (CEF)-related information by line card, use the show cef linecard command in user EXEC or privileged EXEC mode.
show cef linecard [slot-number] [detail] [internal]
Syntax Description
Command Modes
User EXEC
Privileged EXECCommand History
Usage Guidelines
This command is available only on distributed switching platforms.
When you omit the slot-number argument, information about all line cards is displayed. When you omit the slot-number argument and include the detail keyword, detailed information is displayed for all line cards. When you omit the slot-number argument and include the internal keyword, detailed internal information is displayed for all line cards. When you omit all keywords and arguments, the show cef linecard command displays important information about all line cards in table format.
Examples
The following is sample output from the show cef linecard detail command for all line cards:
Router# show cef linecard detailCEF linecard slot number 0, status upSequence number 4, Maximum sequence number expected 28, Seq Epoch 2Send failed 0, Out Of Sequence 0, drops 0Linecard CEF reset 0, reloaded 195 elements packed in 6 messages(3588 bytes) sent69 elements clearedlinecard in sync after reloading0/0/0 xdr elements in LowQ/MediumQ/HighQ11/9/69 peak elements on LowQ/MediumQ/HighQInput packets 0, bytes 0Output packets 0, bytes 0, drops 0CEF Table statistics:Table name Version Prefix-xdr StatusDefault-table 7 4 Active, up, syncCEF linecard slot number 1, status upSequence number 4, Maximum sequence number expected 28, Seq Epoch 2Send failed 0, Out Of Sequence 0, drops 0Linecard CEF reset 0, reloaded 195 elements packed in 6 messages(3588 bytes) sent69 elements clearedlinecard in sync after reloading0/0/0 xdr elements in LowQ/MediumQ/HighQ11/9/69 peak elements on LowQ/MediumQ/HighQInput packets 0, bytes 0Output packets 0, bytes 0, drops 0CEF Table statistics:Table name Version Prefix-xdr StatusDefault-table 7 4 Active, up, syncThe following is sample output from the show cef linecard internal command for all line cards:
Router# show cef linecard internalCEF linecard slot number 0, status upSequence number 11, Maximum sequence number expected 35Send failed 0, Out Of Sequence 0Linecard CEF reset 2, reloaded 2Total elements queued:prefix 4adjacency 4interface 91address 2policy routing 2hw interface 57state 6resequence 2control 13table 2time 4484flow features deactivate 2flow cache config 2flow export config 2dss 2isl 2mpls atm vc remove 2mpls atm vc set label 222314574 elements packed in 4495 messages(90286 bytes) sent115 elements clearedTotal elements cleared:prefix 2adjacency 1interface 63address 1policy routing 1hw interface 29state 2control 5table 1flow features deactivate 1flow cache config 1flow export config 1dss 1isl 1mpls atm vc remove 1mpls atm vc set label 1111linecard disabled - failed a reload0/0/0 xdr elements in LowQ/MediumQ/HighQInput packets 0, bytes 0Output packets 0, bytes 0, drops 0CEF Table statistics:Table name Version Prefix-xdr StatusDefault-table 8 4 Active, syncThe following is sample output from the show cef linecard command. The command displays information for all line cards in table format.
Router# show cef linecardSlot MsgSent XDRSent Window LowQ MedQ HighQ Flags0 6 95 24 0 0 0 up1 6 95 24 0 0 0 upVRF Default-table, version 8, 6 routesSlot Version CEF-XDR I/Fs State Flags0 7 4 8 Active up, sync1 7 4 10 Active up, syncTable 9 describes the significant fields shown in the displays.
Related Commands
show cef not-cef-switched
To display which packets were sent to a different switching path, use the show cef not-cef-switched command in user EXEC or privileged EXEC mode.
show cef not-cef-switched
Syntax Description
This command has no arguments or keywords.
Command Modes
User EXEC
Privileged EXECCommand History
Usage Guidelines
If packets are not being cef switched and you want to determine why, enter the show cef not-cef switched command.
Note
Examples
The following is sample output from the show cef not-cef switched command:
Router# show cef not-cef-switchedCEF Packets passed on to next switching layerSlot No_adj No_encap Unsupp'ted Redirect Receive Options Access FragRP 0 0 0 0 91584 0 0 01 0 0 0 0 0 0 0 02 0 0 0 0 0 0 0 0IPv6 CEF Packets passed on to next switching layerSlot No_adj No_encap Unsupp'ted Redirect Receive Options Access MTURP 0 0 0 0 92784 0 0 01 0 0 0 0 0 0 0 02 0 0 0 0 0 0 0 0Table 10 describes the significant fields shown in the display.
Related Commands
Displays a list of which packets each line card dropped.
Displays CEF-related interface information.
show ipv6 cef
Displays entries in the IPv6 FIB.
show cef timers
To display the current state of the timers internal to the CEF process, use the show cef timers command in user EXEC or privileged EXEC mode.
show cef timers
Syntax Description
This command has no arguments or keywords.
Command Modes
User EXEC
Privileged EXECCommand History
Examples
The following is sample output from the show cef timers command:
Router# show cef timersCEF background processExpiration Type0.208 (parent)0.208 adjacency update hwidb0.540 slow resolution1.208 ARP throttleCEF FIB scanner processExpiration Type44.852 (parent)44.852 checker scan-ribTable 11 describes the significant fields shown in the display.
Table 11 show cef timers Field Descriptions
Expiration
Seconds in which the timers will expire.
Type
Identification of the timer.
Related Commands
show cef interface
Displays CEF-related interface information.
show ipv6 cef
Displays entries in the IPv6 FIB.
