Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 179
Changing OSPF session parameters, Disabling BFD for OSPF
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Changing OSPF session parameters BFD sessions are configured with default intervals and a default role. The parameters that can be configured are: Desired TX Interval, Required Min RX Interval, Detection Multiplier, and system role. These parameters are configured 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 interface level, the change affects all OSPF sessions on that interface. To change parameters for all OSPF sessions: Step 1 Task Change parameters for OSPF sessions. Command Syntax bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value role [active | passive] Command Mode ROUTER-OSPF To change parameters for OSPF sessions on an interface: Step Task 1 Change parameters for all OSPF sessions on an interface. Command Syntax ip ospf bfd all-neighbors interval milliseconds min_rx milliseconds multiplier value role [active | passive] Command Mode INTERFACE View session parameters using the command show bfd neighbors detail, as shown in the example in Changing physical port session parameters. Disabling BFD for OSPF If BFD is disabled globally, all sessions are torn down, and sessions on the remote system are placed in a Down state. If BFD is disabled on an interface, sessions on the interface are torn down, and sessions on the remote system are placed in a Down state (Message 3). 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 with all OSPF neighbors: Step 1 Task Disable BFD sessions with all OSPF neighbors. Command Syntax no bfd all-neighbors Command Mode ROUTER-OSPF To disable BFD sessions with all OSPF neighbors out of an interface: Step 1 Task Command Syntax Disable BFD sessions with all OSPF ip ospf bfd all-neighbors disable neighbors out of an interface Command Mode INTERFACE Bidirectional Forwarding Detection | 179
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