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

[Scott Morris]

And if that's true, then one has to ask what the point of "fixing" it is.
:)

Scott 

-----Original Message-----
From: Chris Morrow [mailto:morrowc at ops-netman.net] 
Sent: Monday, January 07, 2008 9:31 AM
To: Leigh Porter
Cc: swm at emanon.com; 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
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