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zebra: Fix pseudowires with backup nexthops (backport #8731) #9174

Merged
merged 4 commits into from
Jul 24, 2021
Merged

zebra: Fix pseudowires with backup nexthops (backport #8731) #9174

merged 4 commits into from
Jul 24, 2021

Commits on Jul 24, 2021

  1. zebra: use const in rib_match 

    Use const in common rib_match api.

Signed-off-by: Mark Stapp <mjs@voltanet.io>
(cherry picked from commit bc77c3b)
    Mark Stapp authored and mergify-bot committed Jul 24, 2021
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  2. zebra: add boolean to control pw reachability checking 

    Add a boolean to control whether pseudowire reachability
checking needs to be strict.

Signed-off-by: Mark Stapp <mjs@voltanet.io>
(cherry picked from commit 6fb3580)
    Mark Stapp authored and mergify-bot committed Jul 24, 2021
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  3. zebra: revise pw reachability logic 

    Modify the pseudowire reachability logic so that it returns
success if there is at least one installed labelled nexthop for
the route resolving the pw destination. We also check for
valid backup nexthops if necessary, in case there's been a
switchover event.
Only OpenBSD requires that _all_ nexthops be labelled, so we
have a more strict version of the logic also.

Signed-off-by: Mark Stapp <mjs@voltanet.io>
(cherry picked from commit 0d145d4)
    Mark Stapp authored and mergify-bot committed Jul 24, 2021
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  4. zebra: update pw dataplane info 

    Include the complete set of primary and backup nexthops from
the resolving route for a pseudowire. Add accessors for that
info. Modify the logic that creates the fib set of pw nexthops
so that only installed, labelled nexthops are included.

Signed-off-by: Mark Stapp <mjs@voltanet.io>
(cherry picked from commit 072b487)
    Mark Stapp authored and mergify-bot committed Jul 24, 2021
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