General BFD Configuration Considerations

There are several general points to consider when configuring Bidirectional Forwarding Detection (BFD).

• BFD version 1 is supported. BFD version 0 is not supported. BFD version 1 and BFD version 0 are not compatible.
• BFD single-hop sessions always use the primary IP address as the source address. Secondary IP addresses cannot be used as source addresses on single-hop sessions.
• SLX devices support 250 BFD sessions. For a list of supported devices, see Supported Hardware

For more information, see Considerations for Configuring BFD for Layer 3 Protocols