Vxlan Trunks; Vxlan Border Gateway Protocol Control Plane - Cisco Nexus 1000V Troubleshooting Manual

Chapter 25 VXLANs

VXLAN Trunks

A VXLAN trunk allows you to trunk multiple VXLANs on a single virtual Ethernet interface. To achieve
this configuration, you must encapsulate a VXLAN-VLAN mapping on the virtual Ethernet interface.
VXLAN-VLAN mappings are configured through the Virtual Suervisor Module (VSM) and must always
be a 1:1 mapping for each Layer 2 domain. VXLAN-VLAN mappings are applied on a virtual Ethernet
interface using a port profile. A single port profile can support multiple VLAN-VXLAN mappings.

VXLAN Border Gateway Protocol Control Plane

The Border Gateway Protocol (BGP) control plane enables the Cisco Nexus 1000V to exchange the
VXLAN information collected on the VSM-VTEP flood list across VSMs. The Cisco Nexus 1000V
supports BGP peering between 16 VSMs to allow VXLAN segments to reach across servers. BGP runs
on the VSM and can exchange VXLAN information with the BGP on any other Cisco Nexus 1000V. The
Cisco Nexus 1000V can also be used as a route reflector to exchange a VTEP list between VSMs.
This feature extends the unicast-only mode to a multi-VSM environment using a L2VPN EVPN address
family. The VTEP information is not exchanged with the VSMs that are running the old version. They
will continue to work in multicast mode (VXLAN 1.0) or unicast-only mode in a single Cisco Nexus
1000V (VXLAN 1.5).
BGP Commands
This example shows how to enable BGP:
switch# configure terminal
switch(config)# feature bgp
Cisco Nexus 1000V VXLAN Configuration Guide, Release 5.2(1)SV3(1.1)
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Configuring BGP Control Plane
Configuring BGP
switch(config)# interface control0
switch(config-if)# ip address 14.17.199.1/24
switch(config-if)# vrf context default
switch(config-if)# ip route 0.0.0.0/0 14.17.199.254
switch(config-if)# exit
switch(config)# show feature
Feature Name Instance State
----------------------------- -------- --------
bgp
This example shows how to enable BGP with the l2vpn evpn address family:
switch# configure terminal
switch(config)# router bgp 64496
switch(config-router)# router-id 192.169.67.11
switch(config-router)# address-family l2vpn evpn
switch(config-router-af)# copy running-config startup-config
This example shows how to configure a BGP peer:
switch# configure terminal
switch(config)# router bgp 64496
switch(config-router)# neighbor 192.0.2.1 remote-as 64497
switch(config-router)# password password1
switch(config-router-neighbor)# description Peer Router B
switch(config-router-neighbor)# address-family l2vpn evpn
OL-31593-01
Cisco Nexus 1000V Troubleshooting Guide, Release 5.2(1)SV3(1.1)
Information About VXLANs
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