FRR BFD peer configuration is handled incorrectly in some cases
FRR / Status / All):
- Interface: Default; Local Address: <non-default selection>
- Interface: <non-default selection>; Local Address: Default
Additionally, the BFD peer configuration page does not allow the selection of Virtual IPs. This can be problematic in cases where a BGP Neighbor uses BFD and is set to use a localhost VIP as the
Update Source - in which case the BFD session can only be established when no BFD peer entry exists. This also forces the session to use default settings. For example:
When no BFD peer configuration exists and a BGP Neighbor is set to use BFD, the
BFD Peer drop-down list within the neighbor configuration is empty, and saving the configuration results in a peer session being established correctly:
BFD Peers: peer 10.255.5.1 multihop local-address 10.255.5.2 vrf default ID: 1961905122 Remote ID: 2893233196 Active mode Minimum TTL: 254 Status: up Uptime: 31 minute(s), 12 second(s) Diagnostics: ok Remote diagnostics: ok Peer Type: dynamic Local timers: Detect-multiplier: 3 Receive interval: 300ms Transmission interval: 300ms Echo transmission interval: 50ms Remote timers: Detect-multiplier: 3 Receive interval: 300ms Transmission interval: 300ms Echo transmission interval: 50ms
Presumably this is the "default" behavior referenced in the drop-down list's field description.
If a BFD peer configuration entry does exist, this "default" behavior is lost and the drop-down list forces a selection. This can potentially lead to a BGP Neighbor configuration with an incorrect BFD peer, and it no longer allows for a BFD session to be established with a VIP
Local Source Address.
Lastly, editing a BFD peer entry always defaults the
Profile option to
None. Selecting a profile and clicking Save correctly writes the configuration, but the option must be re-selected on every edit.
Updated by Marcos Mendoza 3 months ago
- load the saved
Profilevalue on BFD peer edit
- allow the selection of VIPs for
Local Source Address
- allow the configuration of a "Default"
Interfacewith a non-default selection for
Local Source Address
- allow the selection of "Default" for
BFD Peerwithin the BGP Neighbor configuration page
Updated by Viktor Gurov 3 months ago
- Assignee set to Viktor Gurov