Dell MX9116n EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 567

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 Configure neighbor fall-over OS10(config)# router bgp 100 OS10(config-router-bgp-100)# neighbor 3.1.1.1 OS10(config-router-neighbor)# remote-as 100 OS10(config-router-neighbor)# fall-over OS10(config-router-neighbor)# no shutdown Verify neighbor fall-over on neighbor OS10(config-router-neighbor)# do show ip bgp neighbors 3.1.1.1 BGP neighbor is 3.1.1.1, remote AS 100, local AS 100 internal link BGP version 4, remote router ID 3.3.3.33 BGP state ESTABLISHED, in this state for 00:17:17 Last read 00:27:54 seconds Hold time is 180, keepalive interval is 60 seconds Configured hold time is 180, keepalive interval is 60 seconds Fall-over enabled Received 23 messages 1 opens, 0 notifications, 1 updates 21 keepalives, 0 route refresh requests Sent 21 messages 1 opens, 0 notifications, 0 updates 20 keepalives, 0 route refresh requests Minimum time between advertisement runs is 30 seconds Minimum time before advertisements start is 0 seconds Capabilities received from neighbor for IPv4 Unicast: MULTIPROTO_EXT(1) ROUTE_REFRESH(2) CISCO_ROUTE_REFRESH(128) 4_OCTET_AS(65) Capabilities advertised to neighbor for IPv4 Unicast: MULTIPROTO_EXT(1) Layer 3 567