Re: Slightly OT: MPLS-FRR with Dynamips - not quite working as

Elias,

Perhaps it is a limitation of dynamips, you may see better results with a
steady flow of traffic going through a real lab. To be honest, I had the
same impression as you when testing FRR (dynamips). I was not impressed,
however I have seen it faster than 7 seconds. If link failure detection is
not working fast enough you can try using RSVP hellos as well.

On Tue, Sep 1, 2009 at 9:23 AM, Elias Chari <elias.chari_at_gmail.com> wrote:

> Bryan,
>
> In a real network I would expect to loose traffic in the order of
> milliseconds but not 7-10 seconds as I have observed with Dynampis. My only
> explanation so far is because I am running it on Dynampis and whilst it
> simulates steady state behaviour fairly ok, probably can't cope with fast
> changes that well.
>
> Thanks
> Elias
>
> 2009/9/1 Bryan Bartik <bbartik_at_ipexpert.com>
>
> Elias,
>>
>> You will still lose some traffic during failover, it's not an
>> instantaneous switch even though it is faster than waiting for igp protocol
>> convergence and new tunnel to be built.
>>
>> On Tue, Sep 1, 2009 at 8:23 AM, Elias Chari <elias.chari_at_gmail.com>wrote:
>>
>>> All,
>>>
>>> I tried MPLS-FRR using dynamips on a 7200 platform with various IOSs and
>>> still getting the same result.
>>>
>>> For link protection when the protected link fails, whilst FRR kicks in
>>> and
>>> the TE tunnel is routed over the backup tunnel, I am still losing traffic
>>> for a few seconds. I am just wondering whether this is because I running
>>> this on dynampis.
>>>
>>> I have configured tunnels in both directions etc...fairly confident that
>>> my
>>> configuration is correct.
>>>
>>> Has anyone else noticed the same thing?
>>>
>>> --
>>> Regards,
>>> Elias
>>> CCIE#17354
>>>
>>>
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>>>
>>>
>>
>>
>> --
>> Bryan Bartik
>> CCIE #23707 (R&S), CCNP
>> Sr. Support Engineer - IPexpert, Inc.
>> URL: http://www.IPexpert.com <http://www.ipexpert.com/>
>>
>
>
>
>

-- 
Bryan Bartik
CCIE #23707 (R&S), CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com
Blogs and organic groups at http://www.ccie.net