EFA supports configuration of global router bgp listen-limit through EFA depending on the router bgp dynamic peer scale requirements.
Listen-limit configuration defined under the “global router bgp” context denotes the maximum number of dynamic BGP peers that can be operational (and not configured) across the VRFs in the SLX. Default value of the global router bgp listen-limit is 100, and can be modified with any value in the range of 1-255.
Listen-limit configuration defined at the “dynamic peer listen-range” level must be less than or equal to the “listen-limit” configuration defined under the “global router bgp”.
Pre-2.5.0 versions of EFA do not support configuration of global router bgp listen-limit.
The maximum number of dynamic bgp peers is limited to the SLX default (100), when provisioned through EFA.
You can configure the new fabric setting
bgp-dynamic-peer-listen-limit
per fabric.
The fabric setting is applicable for CLOS and Small Data Center fabrics, and for all types of devices (leaf, border-leaf, spine, super-spine).
The configured value of bgp-dynamic-peer-listen-limit
is configured
on all the devices of the fabric during “fabric configure”.
You can configure the bgp-dynamic-peer-listen-limit
on an already
provisioned fabric. But you must run fabric configure followed by
efa fabric setting update for the new value to be
effective.
This enables you to configure bgp-dynamic-peer-listen-limit on the existing pre-2.5.0 deployments.
Note
You can only increase (but not decrease) the value ofbgp-dynamic-peer-listen-limit
on an already provisioned
fabric.efa fabric setting update –name <fabric-name> --bgp-dynamic-peer-listen-limit <1-255>
Rack1-Device1# show running-config router bgp router bgp local-as 4200000000 capability as4-enable fast-external-fallover listen-limit 200 neighbor 10.20.20.5 remote-as 4200000000 neighbor 10.20.20.5 next-hop-self address-family ipv4 unicast network 172.31.254.139/32 network 172.31.254.226/32 maximum-paths 8 graceful-restart ! address-family ipv6 unicast ! address-family l2vpn evpn graceful-restart ! ! |
Rack1-Device2# show running-config router bgp router bgp local-as 4200000000 capability as4-enable fast-external-fallover listen-limit 200 neighbor 10.20.20.4 remote-as 4200000000 neighbor 10.20.20.4 next-hop-self address-family ipv4 unicast network 172.31.254.115/32 network 172.31.254.226/32 maximum-paths 8 graceful-restart ! address-family ipv6 unicast ! address-family l2vpn evpn graceful-restart ! ! |