On Tue, 12 Jan 2021 at 18:02, James Bensley <[email protected]> wrote: > > Can I omit the "rewrite ..." on both sides? > > Why would you want to? I think that if you do that, a VLAN tagged > frame coming into one end with VLAN 95, will be send over the > pseudoiwre with the VLAN tag still present, at the other end it will > have VLAN 95 push on egress, so it will leave the other end double > tagged with an inner and outer VLAN tag of 95.
I don't believe this is what happens. "rewrite ingress pop 1 symmetric" <-- the symmetric keyword means that it pushes on egress and pops on ingress. Without "rewrite *" it does neither afaik; therefore, if you have the same configuration end-to-end, it works, because the tag is preserved as-is and no vlan tags are pushed or popped anyware (just labels, of course). That's said I don't like the configuration without the rewrite keyword at all, because it is confusing and redundant to have to include the vlan tag, when all you need to transport is a single vlan. And it is easier to get configuration mismatches when you do it this way. Lukas _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
