MPLS VPN-Per VRF Label

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Updated:February 24, 2006

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MPLS VPN—Per VRF Label

Table Of Contents

MPLS VPN—Per VRF Label

Contents

Prerequisites for the Per VRF Label Feature

Restrictions for the Per VRF Label Feature

Information About the Per VRF Label Feature

How to Configure the Per VRF Label Feature

Configuring the Per VRF Label Feature

Examples

Configuration Examples for the Per VRF Label feature

No Label Mode: Example

Mixed Mode (with Global Per-Prefix): Example

Mixed Mode (with Global Per-VRF): Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Command Reference

debug ip bgp vpnv4 unicast

mpls label mode

Feature Information for MPLS VPN—Per VRF Label


MPLS VPN—Per VRF Label

First Published: February 27, 2006

The MPLS VPN—Per VRF Label feature (hereafter, in this document, referred to as the Per VRF Label feature or the Per VRF feature) allows you to configure a single virtual private network (VPN) label for all local routes in the entire VPN routing and forwarding (VRF) domain on supported routers. Prior to this Cisco IOS Release 12.4(6)T, a VPN label allocation was required for each VPN prefix. This new feature incorporates a single (per VRF) VPN label that includes all local routes in the VRF table.

You can enable (or disable) the MPLS VPN—Per VRF Label feature at the router global configuration level by using a new, hidden, CLI command.

History for the MPLS VPN—Per VRF Label Feature

Release
Modification

12.4(6)T

This feature was introduced


Finding Support Information for Platforms and Cisco IOS Software Images

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Contents

This document includes the following topics:

•Prerequisites for the Per VRF Label Feature

•Restrictions for the Per VRF Label Feature

•Information About the Per VRF Label Feature

•How to Configure the Per VRF Label Feature

•Configuration Examples for the Per VRF Label feature

•Additional References

•Command Reference

•Feature Information for MPLS VPN—Per VRF Label

Prerequisites for the Per VRF Label Feature

•If your VRF domain has the external/internal Border Gateway Protocol (EIBGP) multipath feature or the Carrier Supporting Carrier (CSC) feature enabled, disable those features before you configure the Per VRF Label feature.

•Before configuring Multiprotocol Label Switching (MPLS) Layer 3 VPNs, you must have MPLS, Label Distribution Protocol (LDP), and Cisco Express Forwarding (CEF) installed in your network. All routers in the core, including the Provider Edge (PE) routers, must be able to support CEF and MPLS forwarding.

Restrictions for the Per VRF Label Feature

•Enabling the Per VRF Label feature causes BGP reconvergence, which can result in data loss for traffic coming from the MPLS VPN core.

Note You can minimize network disruption by enabling this feature during a scheduled MPLS maintenance window. Also, if possible, avoid enabling this feature on a live router.

•Per-prefix MPLS counters for VPN prefixes are lost when you enable the Per VRF Label feature.

•You cannot use this feature with CSC and EIBGP multipath features.

•When you configure the Per VRF Label feature, the system displays the following message: 

% This command is an unreleased and unsupported feature

This is normal and does not affect the operation of the feature. This feature is supported through the Technical Assistance Center (TAC) for authorized customers.

Information About the Per VRF Label Feature

Prior to this Cisco IOS Release 12.4(6)T, Cisco IOS routers advertised a Per Prefix label for all local routes (the default setting).

The PE stores both local and remote routes and includes a label entry for each route. For distributed platforms, the per-prefix labels consume memory. When there are many VRFs and routes, the amount of memory that the per-prefix labels consume can become an issue.

This new Per VRF Label feature allows the advertisement of a single VPN label for local routes throughout the entire VRF. The router uses a new VPN label for the VRF decoding and IP-based lookup to learn where to forward packets for the PE or CE interfaces.

The following conditions apply when you configure the Per VRF Label feature:

•The VRF uses one label for all local routes.

•When you enable the Per VRF Label feature, a new Per VRF label is created and all local routes will experience some data loss.

•When you disable the Per VRF Label feature, the configuration reverts to the default configuration (Per prefix label).

How to Configure the Per VRF Label Feature

This section describes the following required task:

•Configuring the Per VRF Label Feature

Configuring the Per VRF Label Feature

To configure the Per VRF Label feature, perform the following task.

SUMMARY STEPS

1. enable

2. configure terminal

3. mpls label mode {vrf vrf-name | all-vrfs} protocol bgp-vpnv4 {per-prefix | per-vrf}

4. end

5. show ip vrf detail

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

mpls label mode {vrf vrf-name | all-vrfs} protocol bgp-vpnv4 {per-prefix | per-vrf}

Example:

Router(config)# mpls label mode all-vrfs protocol bgp-vpnv4 per-vrf

Configures the Per VRF Label feature.

Step 4 

end

Example:

Router(config)# end

Returns to privileged EXEC mode.

Step 5 

show ip vrf detail

Example:

Router# show ip vrf detail

Displays the VRF label mode.

Examples

The following command example shows how to verify the Per VRF Label configuration:

In this example output, the bold text indicates the label modes: 

Router# show ip vrf detail


VRF vpn1; default RD 1:1; default VPNID <not set>

VRF Table ID = 1

  Interfaces:

    Ethernet0/0              Serial5/0                Loopback1

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:1:1                  

  Import VPN route-target communities

    RT:1:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-vrf (Label 33)

VRF vpn2; default RD 2:1; default VPNID <not set>

VRF Table ID = 2

  Interfaces:

    Ethernet2/0              Loopback2               

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:2:1                  

  Import VPN route-target communities

    RT:2:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-vrf (Label 20)

VRF vpn3; default RD 3:1; default VPNID <not set>

VRF Table ID = 3

  Interfaces:

    Ethernet3/0              Loopback3               

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:3:1                  

  Import VPN route-target communities

    RT:3:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-vrf (Label 19)


Router# show ip bgp vpnv4 all labels

   Network          Next Hop      In label/Out label

Route Distinguisher: 1:1 (vpn1)

   127.0.0.1/32     192.168.1.1     per-VRF:33/nolabel

   127.0.0.5/32     127.0.0.4       nolabel/19

   192.168.1.0/24   0.0.0.0         per-VRF:33/aggregate(vpn1)

                    192.168.1.1     per-VRF:33/nolabel

   192.168.4.0/24   127.0.0.4       nolabel/20

   172.16.0.0/16    0.0.0.0         per-VRF:33/aggregate(vpn1)

   172.16.128.0/32  192.168.1.1     per-VRF:33/nolabel

Route Distinguisher: 2:1 (vpn2)

   127.0.2.2/32     0.0.0.0         per-VRF:20/aggregate(vpn2)

   127.0.0.6/32     192.168.5.1     per-VRF:20/nolabel

   192.168.5.0/24   0.0.0.0         per-VRF:20/aggregate(vpn2)

   172.17.128.0/32  192.168.5.1     per-VRF:20/nolabel

Route Distinguisher: 3:1 (vpn3)

   127.0.3.2/32     0.0.0.0         per-VRF:19/aggregate(vpn3)

   127.0.0.8/32     192.168.7.1     per-VRF:19/nolabel

   192.168.7.0/24   0.0.0.0         per-VRF:19/aggregate(vpn3)

   172.16.128.0/32  192.168.7.1     per-VRF:19/nolabel



Router# show mpls forwarding-table 


Local  Outgoing    Prefix              Bytes tag  Outgoing   Next Hop    

tag    tag or VC   or Tunnel Id        switched   interface              

16     Pop tag     192.168.3.0/24    0          Et1/0      192.168.2.3     

17     Pop tag     127.0.0.3/32      0          Et1/0      192.168.2.3     

18     17          127.0.0.4/32      0          Et1/0      192.168.2.3     

19     Aggregate   vrf:vpn3          0                                  

20     Aggregate   vrf:vpn2          0                                  

33     Aggregate   vrf:vpn1          0                                  

Router#

Configuration Examples for the Per VRF Label feature

This section shows examples for three different configurations:

•No Label Mode: Example

•Mixed Mode (with Global Per-Prefix): Example

•Mixed Mode (with Global Per-VRF): Example

No Label Mode: Example

The following example shows the default label mode configuration (no label mode).

In this example output, the bold text indicates the label modes: 

Router# show ip vrf detail


VRF vpn1; default RD 1:1; default VPNID <not set>

VRF Table ID = 1

  Interfaces:

    Ethernet0/0              Serial5/0                Loopback1

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:1:1                  

  Import VPN route-target communities

    RT:1:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-prefix

VRF vpn2; default RD 2:1; default VPNID <not set>

VRF Table ID = 2

  Interfaces:

    Ethernet2/0              Loopback2               

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:2:1                  

  Import VPN route-target communities

    RT:2:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-prefix

VRF vpn3; default RD 3:1; default VPNID <not set>

VRF Table ID = 3

  Interfaces:

    Ethernet3/0              Loopback3               

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:3:1                  

  Import VPN route-target communities

    RT:3:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-prefix



Router# show ip bgp vpnv4 all labels


   Network          Next Hop      In label/Out label

Route Distinguisher: 1:1 (vpn1)

   127.0.0.1/32     192.168.1.1     19/nolabel

   127.0.0.5/32     127.0.0.4       nolabel/19

   192.168.1.0/24   192.168.1.1     20/nolabel

                    0.0.0.0         20/aggregate(vpn1)

   192.168.4.0/24   127.0.0.4       nolabel/20

   172.16.0.0/16    0.0.0.0         32/aggregate(vpn1)

   172.16.128.0/32  192.168.1.1     22/nolabel

Route Distinguisher: 2:1 (vpn2)

   127.0.2.2/32     0.0.0.0         23/aggregate(vpn2)

   127.0.0.6/32     192.168.5.1     24/nolabel

   192.168.5.0/24   0.0.0.0         25/aggregate(vpn2)

   172.17.128.0/32  192.168.5.1     26/nolabel

Route Distinguisher: 3:1 (vpn3)

   127.0.3.2/32     0.0.0.0         27/aggregate(vpn3)

   127.0.0.8/32     192.168.7.1     28/nolabel

   192.168.7.0/24   0.0.0.0         29/aggregate(vpn3)

   172.16.128.0/32  192.168.7.1     30/nolabel


Router# show mpls forwarding-table


Local  Outgoing    Prefix              Bytes tag  Outgoing   Next Hop    

tag    tag or VC   or Tunnel Id        switched   interface              

16     Pop tag     192.168.3.0/24    0          Et1/0      192.168.2.3     

17     Pop tag     127.0.0.3/32      0          Et1/0      192.168.2.3     

18     17          127.0.0.4/32      0          Et1/0      192.168.2.3     

19     Untagged    127.0.0.1/32[V]   0          Et0/0      192.168.1.1     

20     Aggregate   192.168.1.0/24[V] 0                                  

22     Untagged    172.16.128.0/32[V]0          Et0/0      192.168.1.1  

23     Aggregate   127.0.2.2/32[V]   0                                  

24     Untagged    127.0.0.6/32[V]   0          Et2/0      192.168.5.1     

25     Aggregate   192.168.5.0/24[V] 0                                  

26     Untagged    172.17.128.0/32[V]0          Et2/0      192.168.5.1     

27     Aggregate   127.0.3.2/32[V]   0                                  

28     Untagged    127.0.0.8/32[V]   0          Et3/0      192.168.7.1     

29     Aggregate   192.168.7.0/24[V] 0                                  

30     Untagged    172.16.128.0/32[V]0          Et3/0      192.168.7.1     

32     Aggregate   172.16.0.0/16[V]  0                                  

Router#

Mixed Mode (with Global Per-Prefix): Example

For this example, the following commands set VPN 1 for per-vrf label mode, VPN 2 for per-prefix label mode, and all remaining VPNs for per-prefix (globally).

In this example output, the bold text indicates the label modes: 

Router# mpls label mode vrf vpn1 protocol bgp-vpnv4 per-vrf

Router# mpls label mode vrf vpn2 protocol bgp-vpnv4 per-prefix

Use the following show commands to display the label mode settings: 

Router# show ip vrf detail 


VRF vpn1; default RD 1:1; default VPNID <not set>

VRF Table ID = 1

  Interfaces:

    Ethernet0/0              Serial5/0                Loopback1

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:1:1                  

  Import VPN route-target communities

    RT:1:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-vrf (Label 33)

VRF vpn2; default RD 2:1; default VPNID <not set>

VRF Table ID = 2

  Interfaces:

    Ethernet2/0              Loopback2               

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:2:1                  

  Import VPN route-target communities

    RT:2:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-prefix

VRF vpn3; default RD 3:1; default VPNID <not set>

VRF Table ID = 3

  Interfaces:

    Ethernet3/0              Loopback3               

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:3:1                  

  Import VPN route-target communities

    RT:3:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-prefix



Router# show ip bgp vpnv4 all label


   Network          Next Hop      In label/Out label

Route Distinguisher: 1:1 (vpn1)

   127.0.0.1/32     192.168.1.1     per-VRF:33/nolabel

   127.0.0.5/32     127.0.0.4       nolabel/19

   192.168.1.0/24   0.0.0.0         per-VRF:33/aggregate(vpn1)

                    192.168.1.1     per-VRF:33/nolabel

   192.168.4.0/24   127.0.0.4       nolabel/20

   172.16.0.0/16    0.0.0.0         per-VRF:33/aggregate(vpn1)

   172.16.128.0/32  192.168.1.1     per-VRF:33/nolabel

Route Distinguisher: 2:1 (vpn2)

   127.0.2.2/32     0.0.0.0         23/aggregate(vpn2)

   127.0.0.6/32     192.168.5.1     24/nolabel

   192.168.5.0/24   0.0.0.0         25/aggregate(vpn2)

   172.17.128.0/32  192.168.5.1     26/nolabel

Route Distinguisher: 3:1 (vpn3)

   127.0.3.2/32     0.0.0.0         27/aggregate(vpn3)

   127.0.0.8/32     192.168.7.1     28/nolabel

   192.168.7.0/24   0.0.0.0         29/aggregate(vpn3)

   172.16.128.0/32  192.168.7.1     30/nolabel


Router# show mpls forwarding-table 


Local  Outgoing    Prefix              Bytes tag  Outgoing   Next Hop    

tag    tag or VC   or Tunnel Id        switched   interface              

16     Pop tag     192.168.3.0/24    0          Et1/0      192.168.2.3     

17     Pop tag     127.0.0.3/32      0          Et1/0      192.168.2.3     

18     17          127.0.0.4/32      0          Et1/0      192.168.2.3     

23     Aggregate   127.0.2.2/32[V]   0                                  

24     Untagged    127.0.0.6/32[V]   0          Et2/0      192.168.5.1     

25     Aggregate   192.168.5.0/24[V] 0                                  

26     Untagged    172.17.128.0/32[V]0          Et2/0      192.168.5.1     

27     Aggregate   127.0.3.2/32[V]   0                                  

28     Untagged    127.0.0.8/32[V]   0          Et3/0      192.168.7.1     

29     Aggregate   192.168.7.0/24[V] 0                                  

30     Untagged    172.16.128.0/32[V]0          Et3/0      192.168.7.1     

33     Aggregate   vrf:vpn1          0                                  

Router#

Mixed Mode (with Global Per-VRF): Example

For this example, the following commands set VPN 1 for per-vrf label mode, VPN 2 for per-prefix label mode, and all remaining VPNs for per-vrf (globally).

In this example output, the bold text indicates the label modes: 

Router# mpls label mode vrf vpn1 protocol bgp-vpnv4 per-vrf

Router# mpls label mode vrf vpn2 protocol bgp-vpnv4 per-prefix

Router# mpls label mode all-vrfs protocol bgp-vpnv4 per-vrf


Router# show ip vrf detail


VRF vpn1; default RD 1:1; default VPNID <not set>

VRF Table ID = 1

  Interfaces:

    Ethernet0/0              Serial5/0                Loopback1

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:1:1                  

  Import VPN route-target communities

    RT:1:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-vrf (Label 33)

VRF vpn2; default RD 2:1; default VPNID <not set>

VRF Table ID = 2

  Interfaces:

    Ethernet2/0              Loopback2               

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:2:1                  

  Import VPN route-target communities

    RT:2:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-prefix

VRF vpn3; default RD 3:1; default VPNID <not set>

VRF Table ID = 3

  Interfaces:

    Ethernet3/0              Loopback3               

  Connected addresses are not in global routing table

  Export VPN route-target communities

    RT:3:1                  

  Import VPN route-target communities

    RT:3:1                  

  No import route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-vrf (Label 19)



Router# show ip bgp vpnv4 all label   


Network          Next Hop      In label/Out label

Route Distinguisher: 1:1 (vpn1)

   127.0.0.1/32     192.168.1.1     per-VRF:33/nolabel

   127.0.0.5/32     127.0.0.4       nolabel/19

   192.168.1.0/24   0.0.0.0         per-VRF:33/aggregate(vpn1)

                    192.168.1.1     per-VRF:33/nolabel

   192.168.4.0/24   127.0.0.4       nolabel/20

   172.16.0.0/16    0.0.0.0         per-VRF:33/aggregate(vpn1)

   172.16.128.0/32  192.168.1.1     per-VRF:33/nolabel

Route Distinguisher: 2:1 (vpn2)

   127.0.2.2/32     0.0.0.0         23/aggregate(vpn2)

   127.0.0.6/32     192.168.5.1     24/nolabel

   192.168.5.0/24   0.0.0.0         25/aggregate(vpn2)

   172.17.128.0/32  192.168.5.1     26/nolabel

Route Distinguisher: 3:1 (vpn3)

   127.0.3.2/32     0.0.0.0         per-VRF:19/aggregate(vpn3)

   127.0.0.8/32     192.168.7.1     per-VRF:19/nolabel

   192.168.7.0/24   0.0.0.0         per-VRF:19/aggregate(vpn3)

   172.16.128.0/32  192.168.7.1     per-VRF:19/nolabel



Router# show mpls forwarding-table    


Local  Outgoing    Prefix              Bytes tag  Outgoing   Next Hop    

tag    tag or VC   or Tunnel Id        switched   interface              

16     Pop tag     192.168.3.0/24       0       Et1/0      192.168.2.3     

17     Pop tag     127.0.0.3/32      0          Et1/0      192.168.2.3     

18     17          127.0.0.4/32      0          Et1/0      192.168.2.3     

19     Aggregate   vrf:vpn3          0                                  

23     Aggregate   127.0.2.2/32[V]   0                                  

24     Untagged    127.0.0.6/32[V]   0          Et2/0      192.168.5.1     

25     Aggregate   192.168.5.0/24[V] 0                                  

26     Untagged    172.17.128.0/32[V]0          Et2/0      192.168.5.1     

33     Aggregate   vrf:vpn1          0                                  

Router#

Additional References

The following sections provide references related to the Per VRF Label feature.

Related Documents

Related Topic
Document Title

MPLS VPNs

Cisco IOS Multiprotocol Label Switching Configuration Guide, Release 12.4
Part 4: MPLS Virtual Private Networks


Standards

Standard
Title

No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

—


MIBs

MIB
MIBs Link

No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs


RFCs

RFC
Title

RFC 2547

BGP/MPLS


Technical Assistance

Description
Link

The Cisco Technical Support website contains thousands of pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

http://www.cisco.com/techsupport


Command Reference

This section documents new and modified commands only.

•debug ip bgp vpnv4 unicast

•mpls label mode

debug ip bgp vpnv4 unicast

To display debugging messages for Virtual Private Network version 4 (VPNv4) unicast routes, use the debug ip bgp vpnv4 unicast command in privileged EXEC mode. To disable debugging output, use the no form of this command.

debug ip bgp vpnv4 unicast {checkpoint | csc | import | keepalives | labelmode | nsf}

no debug ip bgp vpnv4 unicast {checkpoint | csc | import | keepalives | labelmode | nsf}

Syntax Description

csc

Displays VRF processing messages for a Carrier Supporting Carrier (CSC) VPN.

import

Displays VRF import processing messages.

keepalives

Displays Border Gateway Protocol (BGP) keepalives.

labelmode

Displays VRF label mode processing.

updates

Displays BGP updates processing for Unicast VPNv4 address family.


Command Default

Debugging of VPNv4 unicast routes is not enabled.

Command Modes

Privileged EXEC

Command History

Release
Modification

12.0(5)T

This command was introduced.

12.4(6)T

The labelmode keyword was added


Examples

The following example enables debugging of MPLS VPN label mode processing: 

Router# debug ip bgp vpnv4 unicast labelmode

MPLS VPN Label mode processing debugging is on

Router# config terminal

Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)# mpls label mode all-vrfs protocol bgp-vpnv4 per-vrf

% This command is an unreleased and unsupported feature

Router(config)#

*Feb 17 13:45:27.727: vpn: changing the label mode (Enable: per-vrf) for all-vrfs

*Feb 17 13:45:28.355: vpn: pervrf, free local label 19, remove mpls forw entry for 
vpn1:127.0.0.1/255.255.255.255

*Feb 17 13:45:28.355: vpn: create per-vrf mpls forw entry for vrf vpn1, label 33

*Feb 17 13:45:28.355: TFIB AGGR Label: add aggregate label 33 for vrf vpn1

*Feb 17 13:45:28.355: vpn: set pervrf label 33 for vpn1:127.0.0.1/255.255.255.255

*Feb 17 13:45:28.355: vpn: pervrf, free local label 20, remove mpls forw entry for 
vpn1:192.168.1.0/255.255.255.0

*Feb 17 13:45:28.355: vpn: set pervrf label 33 for vpn1:192.168.1.0/255.255.255.0

*Feb 17 13:45:28.355: vpn: pervrf, free local label 32, remove mpls forw entry for 
vpn1:172.16.0.0/255.255.0.0

*Feb 17 13:45:28.355: vpn: set pervrf label 33 for vpn1:172.16.0.0/255.255.0.0

.

.

.

.

.

.

.

*Feb 17 13:45:28.355: vpn: set pervrf label 20 for vpn3:172.16.128.0/255.255.255.255

*Feb 17 13:45:28.355: vpn: label mode change, bnet walk complete.

*Feb 17 13:45:28.355: BGP: VPNv4 Unicast label mode changed^Z

Router#

*Feb 17 13:45:38.455: %SYS-5-CONFIG_I: Configured from console by console

Router# show debug 

Tag VPN:

  MPLS VPN Label mode processing debugging is on

Router#

Related Commands

Command
Description

show ip vrf detail

Displays assigned label mode for the VRF.


mpls label mode

To configure the Per VRF Labels, use the mpls label mode command in global configuration mode. To disable the Per VRF Label feature, use the no form of this command.

mpls label mode {vrf vrf-name | all-vrfs} protocol bgp-vpnv4 {per-prefix | per-vrf}

no mpls label mode {vrf vrf-name | all-vrfs} protocol bgp-vpnv4 {per-prefix | per-vrf}

Syntax Description

vrf

Specifies a single VPN routing and forwarding (VRF) domain you want to configure.

vrf-name

Specifies the name of the single VRF you want to configure.

all-vrfs

Specifies all VRFs you want to configure.

protocol bgp-vpnv4

Assigns the label to the specified protocol.

per-prefix

Assigns the label as per-prefix mode.

per-vrf

Displays the assigned label mode for the VRF.


Command Default

Per-prefix label mode is the default for all local routes.

Command Modes

Global configuration

Command History

Release
Modification

12.4(6)T

This command was introduced.


Usage Guidelines

When you configure the Per VRF Label feature, you will receive the following system message: 

% This command is an unreleased and unsupported feature

This is normal and does not affect the operation of the feature. This feature is supported through the Technical Assistance Center (TAC) for authorized customers.

Examples

The following command example configures all VRFs to per-vrf mode:

Router(config)# mpls label mode all-vrfs protocol bgp-vpnv4 per-vrf

Related Commands

Command
Description

debug ip bgp vpnv4 unicast

Displays debugging messages for VPNv4 unicast routes.

show ip vrf detail

Displays the assigned label mode for the VRF.


Feature Information for MPLS VPN—Per VRF Label

Table 1 lists the release history for this feature.

Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.

Cisco IOS software images are specific to a Cisco IOS software release, a feature set, and a platform. Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.

Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.

Table 1 Feature Information for <Phrase Based on Module Title> 

Feature Name
Releases
Feature Information

MPLS VPN—Per VRF Label

12.4(6)T

The MPLS VPN—Per VRF Label feature allows you to configure a single virtual private network (VPN) label for all local routes in the entire VPN routing and forwarding (VRF) domain on supported routers.

In 12.4(6)T, this feature was introduced.

The following sections provide information about this feature:

•Prerequisites for the Per VRF Label Feature

•Restrictions for the Per VRF Label Feature

•Information About the Per VRF Label Feature

•How to Configure the Per VRF Label Feature

•Configuration Examples for the Per VRF Label feature

•Additional References

•Command Reference


Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.

© 2006 Cisco Systems, Inc. All rights reserved.

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