[126393] in North American Network Operators' Group
Re: BGP and convergence time
daemon@ATHENA.MIT.EDU (shake righa)
Fri May 14 08:54:12 2010
In-Reply-To: <AANLkTikmcDVcHMjRARZJyKANxaZnOVFWXP4IJntEnFTh@mail.gmail.com>
Date: Fri, 14 May 2010 15:54:01 +0300
From: shake righa <ssrigha@gmail.com>
To: frnkblk@iname.com
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Apologies,
kindly ignore my earlier responce.
Rgrds,
Shake
On Fri, May 14, 2010 at 3:46 PM, shake righa <ssrigha@gmail.com> wrote:
> Believe have narrowed down problem to layer 2.
>
> A ping to address 224.0.0.5 shows no reply.
>
> Believe problme to do with blocking of multicast
>
> Regards,
> Shake
>
> On Fri, May 14, 2010 at 5:28 AM, Frank Bulk <frnkblk@iname.com> wrote:
>
>> What about IP SLA with some EEM? This link may give you some ideas:
>> http://blog.ioshints.info/2008/01/ospf-default-route-based-on-ip-sla.html
>>
>> Frank
>>
>> -----Original Message-----
>> From: Jay Nakamura [mailto:zeusdadog@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?
>>
>> Thanks!
>>
>>
>>
>>
>
