ldpd: fix wrong gtsm count (backport #16226) #16338
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In linux networking stack, the received mpls packets will be processed by the host *twice*, one as mpls packet, the other as ip packet, so its ttl decreased 1. So, we need release the `IP_MINTTL` value if gtsm is enabled, it is for the mpls packets of neighbor session caused by the command: `label local advertise explicit-null`. This change makes the gtsm mechanism a bit deviation. Fix PR #8313 Signed-off-by: anlan_cs <[email protected]> (cherry picked from commit 1919df3)
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In linux networking stack, the received mpls packets will be processed by the host twice, one as mpls packet, the other as ip packet, so its ttl decreased 1.
So, we need release the
IP_MINTTLvalue if gtsm is enabled, it is for the mpls packets of neighbor session caused by the command:label local advertise explicit-null.This change makes the gtsm mechanism a bit deviation.
Fix #8313
This is an automatic backport of pull request #16226 done by Mergify.