On Feb 2, 2010, at 2:25 PM, James Carlson wrote: >>> If I have "vlan-announce" set to >>> "gvrp" and I have only (say) "e1000g0" plumbed, do I get empty GVRP >>> messages? >> >> No. Empty messages aren't sent. > > In that case, is there much harm in enabling the feature by default and > asking users to disable if they don't like it? It seems like (despite > the inherent problems) it could be a generally helpful thing, along the > lines of IGMP.
When there are no VIDs that need to be registered, it just parks the worker thread. If GVRP is disabled the thread doesn't even exist. When there are VIDs, there can performance impact if you aren't actually using GVRP -- especially on fast links. GVRP JOIN_IN requests must be resent periodically. A common default from switch manufacturers is 250ms. That means that GVRP has to grab the perimeter every 250ms. Nicolas, what do you think? donour
