On Wed, Nov 10, 2021 at 11:46:55AM +0100, Paolo Valerio wrote:
> In case of native tunnel with bfd enabled, if the MAC address of the
> remote end's interface changes (e.g. because it got rebooted, and the
> MAC address is allocated dynamically), the BFD session will never be
> re-established.
>
> This happens because the local tunnel neigh entry doesn't get updated,
> and the local end keeps sending BFD packets with the old destination
> MAC address. This was not an issue until
> b23ddcc57d41 ("tnl-neigh-cache: tighten arp and nd snooping.")
> because ARP requests were snooped as well avoiding the problem.
>
> Fix this by snooping the incoming packets in the slow path, and
> updating the neigh cache accordingly.
>
> Signed-off-by: Paolo Valerio <[email protected]>
> Fixes: b23ddcc57d41 ("tnl-neigh-cache: tighten arp and nd snooping.")
> Acked-by: Gaetan Rivet <[email protected]>
> ---
If you happen to respin the series, maybe you could add
the tag Reported-at: <bz url>.
Acked-by: Flavio Leitner <[email protected]>
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