On Fri, 26 Jun 2020 16:11:49 +0300 Jonathan Morton <chromati...@gmail.com> wrote:
> Toke has already replied, but: > > > Sure, my proposal does not cover the problem of mangling the CE bit inside > > VLAN-tagged packets, i.e. if we should understand if qdiscs should allow > > it or not. > > This is clearly wrong-headed by itself. > > Everything I've heard about VLAN tags thus far indicates that they should be > *transparent* to nodes which don't care about them; they determine where the > packet goes within the LAN, but not how it behaves. In particular this means > that AQM should be able to apply congestion control signals to them in the > normal way, by modifying the ECN field of the IP header encapsulated within. > > The most I would entertain is to incorporate a VLAN tag into the hashes that > Cake uses to distinguish hosts and/or flows. This would account for the case > where two hosts on different VLANs of the same physical network have the same > IP address. > > - Jonathan Morton > > _______________________________________________ > Cake mailing list > c...@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake The implementation of VLAN's is awkward/flawed. The outer VLAN tag is transparent but the inner VLAN is visible. Similarly the outer VLAN tag doesn't count towards the MTU but inner one does.
