Connectivity Guide

i Return to ROUTER-BGP mode.
exit
For each BGP peer session in the overlay network:
a Congure the BGP peer using its Loopback IP address on the VTEP in ROUTER-BGP mode.
neighbor loopback-ip-address
b Assign the BGP neighbor Loopback address to the autonomous system in ROUTER-BGP-NEIGHBOR mode. The neighbor
Loopback IP address is the source interface on the remote VTEP.
remote-as as-number
c Use the local Loopback address as the source address in BGP packets sent to the neighbor in ROUTER-BGP-NEIGHBOR mode.
update-source loopback0
d Send an extended community attribute to the BGP neighbor in ROUTER-BGP-NEIGHBOR mode.
send-community extended
e Enable the peer session with the BGP neighbor in ROUTER-BGP-NEIGHBOR mode.
no shutdown
f Congure the L2 VPN EVPN address family for VXLAN host-based routing to the BGP peer in ROUTER-BGP-NEIGHBOR
mode.
address-family l2vpn evpn
g Enable the exchange of L2VPN EVPN addresses with the BGP peer in ROUTER-BGP-NEIGHBOR mode.
activate
h Return to ROUTER-BGP mode.
exit
i Enter IPv4 address-family conguration mode from ROUTER-BGP mode.
address-family ipv4 unicast
j Disable the exchange of IPv4 addresses with BGP peers in ROUTER-BGP mode.
no activate
k Return to ROUTER-BGP-NEIGHBOR mode.
exit
l (Optional) If all the leaf switches are congured in the same ASN:
• On each leaf switch, enter L2VPN EVPN address-family conguration mode from ROUTER-BGP-NEIGHBOR mode. Activate
the exchange of L2VPN EVPN addresses with BGP peers. Congure the switch to accept a route with the local AS number
in updates received from a peer in ROUTER-BGP-NEIGHBOR-AF mode.
OS10(config-router-bgp-neighbor)# address-family l2vpn evpn
OS10(config-router-neighbor-af)# activate
OS10(config-router-neighbor-af)# allowas-in 1
OS10(config-router-neighbor-af)# exit
OS10(config-router-bgp-neighbor)# exit
• On each spine switch, disable sender-side loop detection to leaf switch neighbors in ROUTER-BGP-NEIGHBOR-AF mode.
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-neighbor-af)# no sender-side-loop-detection
OS10(conf-router-neighbor-af)# exit
m (Optional) In a VLT deployment, on each leaf switch, congure the number of multi-hop peer routes in ROUTER-BGP-
NEIGHBOR mode to ensure that the BGP EVPN peer session establishes over the VLT VTEP peer if all local links to spine
switches are down.
OS10(conf-router-neighbor)# ebgp-multihop 1
2 Congure EVPN.
An EVPN instance (EVI) spans across the VTEPs that participate in the EVPN. In OS10, congure an EVI in auto-EVI or manual
conguration mode.
• Auto-EVI mode
1 Enable the EVPN control plane in CONFIGURATION mode.
evpn
VXLAN
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