BGP and convergence time
ssrigha at gmail.com
Fri May 14 07:46:17 CDT 2010
Believe have narrowed down problem to layer 2.
A ping to address 126.96.36.199 shows no reply.
Believe problme to do with blocking of multicast
On Fri, May 14, 2010 at 5:28 AM, Frank Bulk <frnkblk at iname.com> wrote:
> What about IP SLA with some EEM? This link may give you some ideas:
> -----Original Message-----
> From: Jay Nakamura [mailto:zeusdadog at gmail.com]
> Sent: Tuesday, May 11, 2010 1:35 PM
> To: NANOG
> Subject: BGP and convergence time
> So, we have two upstreams, both coming in on Ethernet. One of our
> switch crashed and rebooted itself. Although we have other paths to
> egress out the network, because the router's Ethernet interface didn't
> go down, our router's BGP didn't realize the neighbor was down until
> default BGP timeout was reached. Our upstream connectivity was out
> for couple minutes.
> I am looking for ways to detect neighbor being down faster so traffic
> can be re-routed faster. I can do BFD internally but the issue is how
> the upstream is going to detect the outage and stop routing our
> traffic to that downed link. I have asked both of my upstreams and
> one said they don't do anything like that, second upstream I am still
> waiting on the answer.
> My question is, do other carriers do BFD or any other means to detect
> the neighbor being down faster than normal BGP will allow? (Both
> upstreams are major telcos [AT&T and Qwest], so I think they are less
> flexible than some others.)
> Or, has anyone succeeded in getting something done with those two carriers?
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