Dell PowerSwitch S4820T 9.50.1 Configuration Guide for the S4820T System - Page 164

INTERFACE mode ip ospf bfd all-neighbors Example of Verifying Sessions with OSPF Neighbors To view the established sessions, use the show bfd neighbors command. The bold line shows the OSPF BFD sessions. R2(conf-router_ospf)#bfd all-neighbors R2(conf-router_ospf)#do show bfd neighbors * - Active session role Ad Dn - Admin Down C - CLI I - ISIS O - OSPF R - Static Route (RTM) LocalAddr RemoteAddr Interface State Rx-int Tx-int Mult Clients * 2.2.2.2 2.2.2.1 Gi 2/1 Up 100 100 3 O * 2.2.3.1 2.2.3.2 Gi 2/2 Up 100 100 3 O Changing OSPF Session Parameters Configure BFD sessions with default intervals and a default role. The parameters that you can configure are: desired tx interval, required min rx interval, detection multiplier, and system role. Configure these parameters for all OSPF sessions or all OSPF sessions on a particular interface. If you change a parameter globally, the change affects all OSPF neighbors sessions. If you change a parameter at the interface level, the change affects all OSPF sessions on that interface. To change parameters for all OSPF sessions or for OSPF sessions on a single interface, use the following commands. • Change parameters for OSPF sessions. ROUTER-OSPF mode bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value role [active | passive] • Change parameters for all OSPF sessions on an interface. INTERFACE mode ip ospf bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value role [active | passive] To view session parameters, use the show bfd neighbors detail command. Disabling BFD for OSPF If you disable BFD globally, all sessions are torn down and sessions on the remote system are placed in a Down state. If you disable BFD on an interface, sessions on the interface are torn down and sessions on the remote system are placed in a Down state. Disabling BFD does not trigger a change in BFD clients; a final Admin Down packet is sent before the session is terminated. To disable BFD sessions, use the following commands. 164 Bidirectional Forwarding Detection (BFD)