8000 [BGP/BFD] BFD peers are incorrectly specified as multihop when update-source is specified · Issue #19077 · FRRouting/frr · GitHub
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[BGP/BFD] BFD peers are incorrectly specified as multihop when update-source is specified #19077
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@bmhughes

Description

@bmhughes

Description

When a BGP neighbor in the same subnet has BFD enabled, if an update-source is specified then the BFD peer will always be setup as multihop. This breaks the BFD peering and thus the BGP neighbor. Happens for both v4 and v6 neighbors.

This is working correctly with 10.1.0 but fails with 10.3.0.

Version

10.3.0

How to reproduce

Configure a BGP neighbor with BFD enabled (dynamic or static) and configure an update-source for a neighbor in the same subnet.

Expected behavior

BFD peer should not be multihop for a subnet adjacent neighbor.

Actual behavior

BFD peer is always configured a multihop. With a statically configured peer a conflicting multihop peer is created and with dynamic an incorrect multihop peer is created.

Additional context

No response

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  • I have searched the open issues for this bug.
  • I have not included sensitive information in this report.

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