On Mon, 7 May 2007 20:32:17 +0200 Fermín Galán Márquez <fermin.galan@xxxxxxx> wrote: > Hi, > > Is there a limit in the number of interfaces a virtual bridge (created with > brctl) can support without having a severe impact in performance? The problem with lots of interfaces is that if destination address is not known (or multicast/broadcast) the packet has to be copied and sent N times. > I guess that there is no absolute answer for that question :), but maybe > there is some kind of procedure/tool to know the "stress" or "load" that a > virtual bridge is supporting in a given moment (in a similar way that a > "top" can show you the CPU load). Worst case is the flooding problem. > My question is due to I'm using a virtual bridge with 14 interfaces (each > interface correspond to a Xen virtual machine in the same physical host) > and, given that I'm experiencing transmission delays in the network > supported by the bridge, I'm suspecting about a loss of performance of it. Probably when flooding it has to wake up all the guest machines and that is sucking your performance on hypervisor switches. > Thanks in advance! > > Best regards, > > -------------------- > Fermín Galán Márquez > CTTC - Centre Tecnològic de Telecomunicacions de Catalunya > Parc Mediterrani de la Tecnologia, Av. del Canal Olímpic s/n, 08860 > Castelldefels, Spain > Room 1.02 > Tel : +34 93 645 29 12 > Fax : +34 93 645 29 01 > Email address: fermin dot galan at cttc dot es > > > > _______________________________________________ > Bridge mailing list > Bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx > https://lists.linux-foundation.org/mailman/listinfo/bridge -- Stephen Hemminger <shemminger@xxxxxxxxxxxxxxxxxxxx> _______________________________________________ Bridge mailing list Bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/bridge
