Dell MX9116n EMC SmartFabric OS10 User Guide - Page 526

7. Assign a peer-template with a peer-group name from which to inherit to the neighbor in ROUTER-NEIGHBOR mode. inherit template template-name 8. Enable the neighbor in ROUTER-BGP mode. neighbor ip-address 9. Enable the peer-group in ROUTER-NEIGHBOR mode. no shutdown When you add a peer to a peer group, it inherits all the peer group configured parameters. When you disable a peer group, all the peers within the peer template that are in the Established state move to the Idle state. A neighbor cannot become a part of a peer group if it has any of these commands configured: • advertisement-interval • next-hop-self • route-map out • route-reflector-client • send-community A neighbor may keep its configuration after it is added to a peer group if the neighbor configuration is more specific than the peer group and if the neighbor configuration does not affect outgoing updates. To display the peer-group configuration that is assigned to a BGP neighbor, use the show ip bgp peer-group peer-group-name command. The show ip bgp neighbor command output does not display peer-group configurations. Configure peer templates OS10(config)# router bgp 300 OS10(config-router-bgp-300) vrf blue OS10(config-router-vrf)# template ebgppg OS10(config-router-template)# remote-as 100 OS10(config-router-template)# description peer_template_1_abcd OS10(config-router-template)# exit OS10(config-router-vrf)# neighbor 3.1.1.1 OS10(config-router-neighbor)# inherit template ebgppg OS10(config-router-neighbor)# no shutdown Neighbor fall-over The BGP neighbor fall-over feature reduces the convergence time while maintaining stability. When you enable fall-over, BGP tracks IP reachability to the peer remote address and the peer local address. When remote or peer local addresses become unreachable, BGP brings the session down with the peer. For example, if no active route exists in the routing table for peer IPv6 destinations/local address, BGP brings the session down. By default, the hold time governs a BGP session. Configure BGP fast fall-over on a per-neighbor or peer-group basis. BGP routers typically carry large routing tables as frequent session resets are not desirable. If you enable fail-over, the connection to an internal BGP peer is immediately reset if the host route added to reach the internal peer fails. 1. Enter the neighbor IP address in ROUTER-BGP mode. neighbor ip-address 2. Disable fast fall-over in ROUTER-NEIGHBOR mode. no fall-over 3. Enter the neighbor IP address in ROUTER-BGP mode. neighbor ip-address 4. Enable BGP fast fall-Over in ROUTER-NEIGHBOR mode. fall-over 526 Layer 3