I believe it's the incoming traffic that's the problem... the standby interface will happily accept traffic on its real IP.
Bruce Robertson, President/CEO +1-775-348-7299 Great Basin Internet Services, Inc. company-wide fax: +1-775-348-9412 http://www.greatbasin.net my efax: +1-775-201-1553 Ian Cox wrote: > At 08:33 PM 10/26/2007 +0100, Phil Mayers wrote: > >> On Fri, 2007-10-26 at 13:08 -0500, Justin Shore wrote: >> >>> Phil Mayers wrote: >>> >>>>> Is there a HSRP option to tell the standby router to only route traffic >>>>> when it's active? VRRP and GLBP would have the same problem I imagine. >>>>> > > What exactly do you mean by not route traffic? HSRP on the standby > does not route traffic for the HSRP vmac, it drops the traffic on the > floor. If it did not do this when you have a unicast flood packet > both switches would forward the packet and have duplicate packets. > Then you have the case of the end station using the real interface of > the standby router instead of the vmac and that still a valid > requirement to need to forward frames. > > > Ian > > >>>> No. This is a frequently requested feature. >>>> >>> I think I'll ping my account team to add my voice to the list. This >>> seems like an awfully easy feature addition to me. I can't think of any >>> >> At first hearing it does indeed seem easy. Having put some thought into >> why Cisco don't offer this (fairly obvious) feature, I've concluded >> there are some non-trivial difficulties doing it in the fully general >> cases that HSRP can support, and on some forwarding architectures. >> >> >> >>> downside to doing it either. >>> >>> Justin >>> >> _______________________________________________ >> cisco-nsp mailing list cisco-nsp@puck.nether.net >> https://puck.nether.net/mailman/listinfo/cisco-nsp >> archive at http://puck.nether.net/pipermail/cisco-nsp/ >> > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > > > > _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/