Re: BGP Multihomming issue...

This sounds like your ISP1 is receiving your ISP2 advertisement and
sticking to it because of his policy.
There are some scenarios where this can happen, talk to them...
-Carlos

muhammad adnan @ 13/10/2011 04:10 -0300 dixit:
> Dear Zack dont assume any thing i am monitoring on the web site
> http://lg.bt.net this shows me hows my as prepending..
>
> Thanks
>
>
>
>
>
> On Thu, Oct 13, 2011 at 8:37 AM, Zack Tennant <ccie_at_tnan.net> wrote:
>
>> Andre already did... check a route server on the internet for your route
>> when going through ISP2... I'd strongly suspect your not actually prepending
>> the route like you think you are, or the carrier is stipping the prepending
>> off.
>>
>> I'm also lost on how this affects your study to pass the lab; but perhaps
>> this real-world problem is occupying all your study time.
>>
>> On Wed, Oct 12, 2011 at 09:10, muhammad adnan <taurusadnan19_at_gmail.com>wrote:
>>
>>> Can any body tell me the solution, my x.x.y.0 pool at ISP2 revert back
>>> automatically ....
>>>
>>>
>>>
>>> Thanks a lot
>>>
>>> On Wed, Oct 12, 2011 at 4:49 PM, Christian Hunter <stasis416_at_gmail.com
>>>> wrote:
>>>> *BGP will* look at the ages of the *routes* and use the *oldest route*
>>> to
>>>
>>>> particular destination for stability
>>>>
>>>> -Christian
>>>>
>>>> On Wed, Oct 12, 2011 at 7:20 AM, muhammad adnan <
>>> taurusadnan19_at_gmail.com>wrote:
>>>>> Dear Group members:-
>>>>> I am facing a issue regarding BGP
>>>>> Multi-homming.my scenario is, i am advertizing ip pool x.x.y.0 with ISP
>>> 2
>>>>> and the same pool advertize to ISP1 with as path prepending.so ISP 2 is
>>>>> preferred for this pool. the issue is when i shut it my preferred path
>>>>> (i,e
>>>>> ISP2) the pool x.x.y.0 routed to the ISP1 immediately and when i no sh
>>> my
>>>>> ISP2 link the ip pool not revert back to ISP2...:)
>>>>>
>>>>>
>>>>> Any one plz guide me is it a limitation in BGP
>>>>>
>>>>> Thanks a lot
>>>>> Adnan
>>>>>
>>>>>
>>>>> Blogs and organic groups at http://www.ccie.net
>>>>>
>>>>> _______________________________________________________________________
>>>>> Subscription information may be found at:
>>>>> http://www.groupstudy.com/list/CCIELab.html
>>>
>>> Blogs and organic groups at http://www.ccie.net
>>>
>>> _______________________________________________________________________
>>> Subscription information may be found at:
>>> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net