Does anyone know if it's available in another IGP? Or does anyone have any sample scripts I might able to try out?
Anthony J Baade Network Engineer Business Only Broadband, LLC O (630) 590-6011 C (630) 340-0696 t...@bobbroadband.com www.bobbroadband.com -----Original Message----- From: Rodney Dunn [mailto:rod...@cisco.com] Sent: Thursday, July 23, 2009 9:33 PM To: Tony Baade Cc: cisco-nsp@puck.nether.net Subject: Re: [c-nsp] OSPF question Tony Baade wrote: > We experienced an issue on our network where we have a link between 2 cisco > ME6524s. There was packet loss across the link, but the interfaces on either > side never actually dropped. The packet loss however was severe enough to > cause problems w/ our OSPF (the neighbor session kept dropping up and down) > and as a result this caused our iBGP hellos to timeout, causing an outage > affecting several routers. > > My question is there some way to dampen a flapping neighbor in OSPF? Not natively. I tried to get that in a few years ago but couldn't make it happen. If you wanted it bad enough you could code it up with EEM and a TCL script to watch for a neighbor flap and passive that interface for some time. Interface event dampening covers the link flap but just for the OSPF transport we don't do it. The enhancement request to track it was: CSCsi29746 Routing protocol neighbor dampening request So if the interface doesn't actually go down, but there is X amount of packet loss in Y amount of time (or if the neighbor goes up and down a certain number of times) the switch will recognize this issue and stop using that link? We are already using IP Event Dampening, which didn't kick in because the interfaces never actually went down. > > If there's no way in OSPF to do this, is there support for this in another > IGP, or is there any other workaround for this kind of situation? > > Any advice is appreciated, thanks in advance, > > t. baade > > _______________________________________________ > 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/
