Attempt neighbor entry reprogramming on L3 miss #1842
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neighbor entries. On an l3 miss try to reprogram the neighbor entry if the peer is valid. Its a best effort attempt because if the arp table is still at gc_thresh3 value, addition will fail. Signed-off-by: Santhosh Manohar <santhosh@docker.com>
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@mavenugo PTAL |
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LGTM |
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When the gc_thresh3 value is reached kenel might remove existing neighbor entries. On an l3 miss try to reprogram the neighbor entry if the peer is valid.
Ideally the gc_thresh* values should be bumped up to avoid this issue. Since most customer are not aware of this setting #1789 increases it as part of the overlay driver init.
This patch is a best effort attempt to help if the user has for some reason reduced this value. neighbor entry programming will succeed if the arp table is currently not at gc_thresh3 value.
Signed-off-by: Santhosh Manohar santhosh@docker.com