Explore Cisco
How to Buy

Have an account?

  •   Personalized content
  •   Your products and support

Need an account?

Create an account

Cisco Nexus 9000 Series NX-OS VXLAN Configuration Guide, Release 9.3(x)

Bias-Free Language

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.

Book Contents
Find Matches in This Book
Available Languages
Download Options

Book Title

Cisco Nexus 9000 Series NX-OS VXLAN Configuration Guide, Release 9.3(x)

Chapter Title

Configuring Seamless Integration of EVPN with L3VPN (MPLS LDP)

Results

Updated:
May 31, 2022

Chapter: Configuring Seamless Integration of EVPN with L3VPN (MPLS LDP)

Configuring Seamless Integration of EVPN with L3VPN (MPLS LDP)

This chapter contains the following sections:

Information About Configuring Seamless Integration of EVPN with L3VPN (MPLS LDP)

Data center deployments have adopted VXLAN EVPN for its benefits like EVPN control-plane learning, multitenancy, seamless mobility, redundancy, and easier POD additions. Similarly, the Core is either an LDP-based MPLS L3VPN network or transitioning from traditional an MPLS L3VPN LDP-based underlay to a more sophisticated solution like segment routing (SR). Segment routing is adopted for its benefits like unified IGP and MPLS control planes, simpler traffic engineering methods, easier configuration, and SDN adoption.

With two different technologies, one within the data center and one in the Core, it is natural to handoff from VXLAN to an MPLS-based core at the Border Leaf. These nodes which sit on the edge of the DC domain, interfacing with the Core edge router.

Guidelines and Limitations for Configuring Seamless Integration of EVPN with L3VPN (MPLS LDP)

The following are the guidelines and limitations for Configuring Seamless Integration of EVPN with L3VPN (MPLS LDP):

The following features are supported:

  • Cisco Nexus 9504 and 9508 switches with -R and -RX line cards.

  • Layer 3 orphans

  • 256 peers/nodes within a VXLAN DC domain

  • By default, MPLS extended ECMP is enabled.

  • 24,000 ECMP routes by default on -RX line cards.


    Note

    If you enter the no hardware profile mpls extended-ecmp command, the mode is switched to 4 K ECMP routes. This is applicable only when the line card is -RX and the ECMP group has exactly 2 paths.

The following features are not supported:

  • Subnet stretches across the DC domain

  • vPC

  • SVI/Subinterfaces

Configuring Seamless Integration of EVPN with L3VPN (MPLS LDP)

These configuration steps are required on a DCI switch to import and re-originate the routes from a VXLAN domain to an MPLS domain and back to a VXLAN domain.

Procedure

  Command or Action Purpose
Step 1

configure terminal

Example:

switch# configure terminal

Enters global configuration mode.

Step 2

feature mpls l3vpn

Example:

switch# feature mpls l3vpn

Enables the MPLS Layer 3 VPN feature.

Step 3

feature mpls ldp

Example:

switch# feature mpls ldp

Enables the MPLS Label Distribution Protocol (LDP).

Step 4

nv overlay evpn

Example:

switch(config)# nv overlay evpn

Enables the EVPN control plane for VXLAN.

Step 5

router bgp number

Example:

switch(config)# router bgp 100

Configures BGP. The value of the number argument is from 1 to 4294967295.

Step 6

address-family ipv4 unicast

Example:

switch(config-router)# address-family ipv4 unicast

Configures the address family for IPv4.

Step 7

redistribute direct route-map route-map-name

Example:

switch(config-router-af)# redistribute direct route-map passall

Configures the directly connected route map.
Step 8

exit

Example:

switch(config-router-af)# exit

Exits command mode.

Step 9

address-family l2vpn evpn

Example:

switch(config-router)# address-family l2vpn evpn

Configures the L2VPN address family.

Step 10

exit

Example:

switch(config-router-af)# exit

Exits command mode.

Step 11

neighbor address remote-as number

Example:

switch(config-router)# neighbor 108.108.108.108 remote-as 22

Configures a BGP neighbor. The range of the number argument is from 1 to 65535.

Step 12

update-source type/id

Example:

switch(config-router-neighbor)# update-source loopback100

Specifies the source of the BGP session and updates.

Step 13

ebgp-multihop ttl-value

Example:

switch(config-router-neighbor)# ebgp-multihop 10

Specifies the multihop TTL for the remote peer. The range of ttl-value is from 2 to 255.

Step 14

address-family ipv4 unicast

Example:

switch(config-router-neighbor)# address-family ipv4 unicast

Configures the unicast sub-address family.
Step 15

send-community extended

Example:

switch(config-router-neighbor-af)# send-community extended

Configures the community attribute for this neighbor.

Step 16

exit

Example:

switch(config-router-neighbor-af)# exit

Exits command mode.

Step 17

address-family vpnv4 unicast

Example:

switch(config-router-neighbor)# address-family vpnv4 unicast

Configures the address family for IPv4.

Step 18

send-community extended

Example:

switch(config-router)# send-community extended

Sends the extended community attribute.
Step 19

import l2vpn evpn reoriginate

Example:

switch(config-router)# import l2vpn evpn reoriginate

Reoriginates the route with a new RT.
Step 20

neighbor address remote-as number

Example:

switch(config-router)# neighbor 175.175.175.2 remote-as 1

Defines the neighbor.

Step 21

address-family ipv4 unicast

Example:

switch(config-router)# address-family ipv4 unicast

Configures the address family for IPv4.

Step 22

send-community extended

Example:

switch(config-router)# send-community extended

Configures the community for BGP neighbors.

Step 23

address-family ipv6 unicast

Example:

switch(config-router)# address-family ipv6 unicast

Configures the IPv6 unicast address family. This is required for IPv6 over VXLAN with an IPv4 underlay.

Step 24

send-community extended

Example:

switch(config-router)# send-community extended

Configures the community for BGP neighbors.

Step 25

address-family l2vpn evpn

Example:

switch(config-router)# address-family l2vpn evpn

Configures the L2VPN address family.

Step 26

send-community extended

Example:

switch(config-router)# send-community extended

Configures the community for BGP neighbors.

Step 27

import vpn unicast reoriginate

Example:

switch(config-router)# import vpn unicast reoriginate

Reoriginates the route with a new RT.

Was this Document Helpful?

FeedbackFeedback

Contact Cisco