[ovs-dev] [PATCH] tnl-neigh: Use outgoing ofproto version.
fbl at sysclose.org
Tue Aug 13 16:45:11 UTC 2019
On Tue, Aug 13, 2019 at 01:34:04PM -0300, Flavio Leitner via dev wrote:
> When a packet needs to be encapsulated in userspace, the endpoint
> address needs to be resolved to fill in the headers. If it is not,
> then currently OvS sends either a Neighbor Solicitation (IPv6)
> or an ARP Query (IPv4) to resolve it.
> The problem is that the NS/ARP packet will go through the flow
> rules in the new bridge, but inheriting the ofproto table version
> from the original packet to be encapsulated. When those versions
> don't match, the result is unexpected because no flow rules might
> be visible, which would cause the default table rule to be used
> to drop the packet. Or only part of the flow rules would be visible
> and so on.
> Since the NS/ARP packet is created by OvS and will be injected in
> the outgoing bridge, use the corresponding ofproto version instead.
Please backport this up to 2.9 at least.
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