[j-nsp] Maximum AS PATH length

[Kevin Epperson]

I believe juniper was working on a specific knob similiar to cisco...not
sure what code that is/was introduced in or details.

In leiu of that you could build an as-path filter that wild card matchs a
path of X or more and filter it out as you would martians and other bad
things.

It would likely look something like this to filter 25+ AS path length:

 as-path long-path ". . . . . . . . . . . . . . . . . . . . . . . . .*"

	-Kevin

On Thu, 17 Feb 2005, Edwin Lok wrote:

> Hi,
>
> Recently that was a case of an exceptionally long ASPATH being
> advertised in the internet.
>
> Jan 30 18:34:51 EST: %BGP-6-ASPATH: Long AS path 6461 3356 6770 8282 8282
> 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282
> 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282
> 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282
> 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282
> 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282
> 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282 8282
>
> Cisco has a way to limit the maximum as-path received. Is there a similar
> command in Junos to do this? And will the router have any issue with this
> abnormally long AS PATH advertisements?
>
> Rgds
> Edwin
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