[j-nsp] AS-PAth Prepend and Loop Command

[Leigh Porter]

You should not tell us who they are to embarrass them :)

--
Leigh

NAIDOO Kesva ROSI/I-BNF wrote:
> If this is a way of securing BGP updates then it is not a good solution.
> If your neighbor, EBGP peer is prepending your AS in their updates then
> they do not want you to know about their advertised networks. Why not do
> this with a well know community, like no-export.
>
> I think that this EBGP peer is behaving abnormally and I agree with the
> other posts.
>
> Kesva
>
>
>
> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Chris Morrow
> Sent: Monday, January 07, 2008 9:31 AM
> To: Leigh Porter
> Cc: juniper-nsp at puck.nether.net
> Subject: Re: [j-nsp] AS-PAth Prepend and Loop Command
>
>
>
> On Mon, 7 Jan 2008, Leigh Porter wrote:
>
>   
>> Here here.. Who's idea was that?
>>
>>     
>
> perhaps someone doesn't want the other end talking to them? This I've
> seen 
> used as a security measure at times:  "AS1 is really bad, they have a 
> giant route list I can't filter that how about I just don't accept their
>
> routes? Oh, I could do that by prepending their AS on my announcements, 
> done!"
>
>   
>> Scott Morris wrote:
>>     
>>>> From a technical standpoint, yes.  BGP sees a loop whenever it sees
>>>>         
> its own
>   
>>> AS in the path.
>>>
>>>       
>>>> From a political/personal standpoint, you need to reach out and
>>>>         
> smack the
>   
>>> brainchild that is prepending YOUR AS into their BGP records.  It
>>>       
> would
>
> they might be doing it for a reason they feel is valid (see above)
>
>   
>>> serve them right to not be reached.
>>>       
>
> that might be their intent...
>
>   
>>> Just my thoughts.
>>>
>>> Scott
>>>
>>>
>>> -----Original Message-----
>>> From: juniper-nsp-bounces at puck.nether.net
>>> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Reza
>>>       
> Sharifi
>   
>>> Sent: Sunday, January 06, 2008 5:12 PM
>>> To: juniper-nsp at puck.nether.net
>>> Subject: [j-nsp] AS-PAth Prepend and Loop Command
>>>
>>> Hi All,
>>>
>>> If I have an external BGP connection to my neighbor, and if the
>>>       
> neighbor is
>   
>>> Prepending my own AS to the routes that is sending to me, do I need
>>>       
> to
>   
>>> implement the command " set routing-options autonomous-system loop to
>>>       
> all of
>   
>>> my internal routers inside my AS in order to get those routes?
>>> So far, the only way I have been able to get the routes to all my
>>>       
> internal
>   
>>> routers is by applying the loop command, and do a clear BGP neighbor
>>> soft-inbound I am running JUNOS 7.3R3.6, Is there any other way of
>>> implementing this?
>>>
>>> Thanks,
>>> Reza
>>> _________________________________________________________________
>>> Share life as it happens with the new Windows Live.
>>>
>>>       
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>   
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>>     
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