Thanks, Oliver. I'll do some test setups on this and let you know the results!
Regards, Traiano Sent via my BlackBerry from Vodacom - let your email find you! -----Original Message----- From: "Oliver Boehmer (oboehmer)" <[email protected]> Date: Fri, 27 Nov 2009 10:13:51 To: <[email protected]>; <[email protected]> Subject: RE: [c-nsp] Using BFD as a link monitoring protocol > Correct, I intend using one of bgp, isis or other appropriate IGP with BFD > as cisco recommends in their documentation. Ok. fine. > Are you sure there is no mib for BFD?, I see, on ciscos ftp mib repository, > a bfd-ietf-mib.txt that reads " ... Mib for bidirectional forwarding > protocol... "? There is this MIB, but as far as I know, it has just been implemented, and it is currently ony in 12.2(33)SRE images. No idea when this will show up in other trains.. > Alternatively, if I used this with isis, for example, would I be able to > have isis generate traps, based on detection performed by the BFD mechanism? I think so, you can use ciiAdjacencyChange (in CISCO-IETF-ISIS-MIB) to detect ISIS adjacency changes (MIB support is also quite new, please check availability in your image(s) using MIB locator at http://tools.cisco.com/ITDIT/MIBS/MainServlet) oli > > ------Original Message------ > From: Oliver Boehmer (oboehmer) > To: [email protected] > To: [email protected] > Sent: Nov 27, 2009 9:03 AM > Subject: RE: [c-nsp] Using BFD as a link monitoring protocol > > Hi, > > > I need to monitor the state of links between router interfaces, and I > have > > a case where the link may go down (due to fibre break at L2) but the > > interfaces still appear up when polled (we're on a ring). When a link > goes > > down I need to get sent a trap specifically identifying which link > went > > down, so I've looked at BFD (Bidirectional Forwarding Detection), and > the > > idea is to set up bfd sessions to run between each pair of interfaces > that > > define a link, and a session failure will result in snmp traps being > sent > > identifying which link failed. > > > > My question is: Has anyone deployed BFD for this purpose, i.e link > failure > > monitoring, and is this an appropriate application of BFD? > > Well, you can't just run BFD by itself, you need to have an > application/client (routing protocols, HSRP, etc.) which is configured > to use BFD before BFD establishes a session (not sure if the hidden > command "bfd neighbor x.x.x.x" can work around this). > In addition, BFD MIB is not yet there except in 12.2SRE. > > Not sure how many pairs you need to monitor, but you could investigate > using IP-SLA probes for this purpose.. > > oli > > > Sent via my BlackBerry from Vodacom - let your email find you! _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
