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receives a Down status notification from the remote system, the session state on the local system
changes to Init.
Figure 10. Session State Changes
Important Points to Remember
• On the Z9500, the system supports 128 sessions at 200 minimum transmit and receive intervals with a
multiplier of 3, and 64 sessions at 100 minimum transmit and receive intervals with a multiplier of 4.
• Enable BFD on both ends of a link.
• Demand mode, authentication, and the Echo function are not supported.
• BFD is not supported on multi-hop and virtual links.
• Protocol Liveness is supported for routing protocols only.
• The Z9500 supports only OSPF, IS-IS, and VRRP protocols as BFD clients; BGP is not supported.
Configure BFD
This section contains the following procedures.
• Configure BFD for Static Routes
• Configure BFD for OSPF
• Configure BFD for OSPFv3
Bidirectional Forwarding Detection (BFD)
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