Re: Bgp update source loopback

Technically speaking sure, but that would introduce inconsistency and
certain level of unpredictability of this peering behavior. As many
folks have pointed out, peering from IP address of physical interface vs
loopback involves peer IP address reachbility and in case of MPLS
environments also proper labes assignments.

The easiest way to understand is to play around with it on Dynamips,
real quick setup of 2 to 4 routers would do.

HTH
A

On 5/16/2010 2:28 PM, Raghav Bhargava wrote:
> Since we all are talking about BGP update source loopback.
>
> Experts,
>
> Can we have below command on one Router and not on the other one and form
> ibgp peering..:)
>
> neighbor x.x.x.x update-source-loopback x
>
>
> Raghav
>
> On Sat, May 15, 2010 at 9:13 PM, Mustafa Yadav<mustafa.yadav_at_gmail.com>wrote:
>
>
>> Good be a good troobleshooting question if it is not configured.
>>
>> On Sun, May 16, 2010 at 6:55 AM, Scott Morris<swm_at_emanon.com> wrote:
>>
>>
>>> If you decide not to, there will be lots of extra work in order to get
>>>
>> your
>>
>>> next-hop information correlating with your label path information....
>>>
>>>
>>>
>>>
>>> Mustafa Yadav wrote:
>>>
>>> Hi All,
>>>
>>> I see i-bgp configuration in all mpls labs done by using update-source
>>> loopback.Why do we have to use loopback as a source?If we do not use I
>>>
>> think
>>
>>> ibgp also come up.Is not that right?
>>>
>>>
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Received on Sun May 16 2010 - 15:03:30 ART