[j-nsp] AS path access list (regexp)

[Jeff Tantsura]

Hi Kana,

Would be applicable if only the first AS prepends, you can read it as:
1AS - 1 or more, then 0 or 1 or 2 AS's follow.
If 2nd and 3rd AS numbers are known you could match these like this:
AS1+
AS1+ AS2+
AS1+ AS2+ AS3+ 

Cheers,
Jeff
> -----Original Message-----
> From: Kanagaraj Krishna [mailto:kanagaraj at aims.com.my]
> Sent: zaterdag 21 april 2007 18:22
> To: jeff.tantsura at sscplus.nl
> Cc: juniper-nsp at puck.nether.net
> Subject: RE: [j-nsp] AS path access list (regexp)
> 
> Jeff,
>      Would it still be applicable if either of the AS hops prepend?
> 
> /Kana
> 
> > Hi,
> >
> > It would look like:
> > ABCD+ .{0,2}
> >
> > Regards,
> > Jeff
> >
> > > -----Original Message-----
> > > From: juniper-nsp-bounces at puck.nether.net [mailto:juniper-nsp-
> > > bounces at puck.nether.net] On Behalf Of Kanagaraj Krishna
> > > Sent: vrijdag 20 april 2007 12:54
> > > To: juniper-nsp at puck.nether.net
> > > Subject: Re: [j-nsp] AS path access list (regexp)
> > >
> > > Hi,
> > >      I have this AS path access list to one of my BGP peerings
> (inbound
> > > route map) which is based on Cisco to set different local pref to:
> > >
> > > - direct peering AS
> > > - direct peering AS + 1st AS hop
> > > - direct peering AS + 1st AS hop + 2nd AS hop
> > >
> > > Based on Cisco
> > > -----------------------
> > >   ip as-path access-list 77 permit ^(ABCD_)+$
> > >   ip as-path access-list 77 permit ^(ABCD_)+[0-9]+$
> > >   ip as-path access-list 77 permit ^(ABCD_)+[0-9]+_[0-9]+$
> > >
> > >
> > > How do i mirror the same requirement on a Juniper? Thanks.
> > >
> > > Regards,
> > > Kana
> > > _______________________________________________
> > > juniper-nsp mailing list juniper-nsp at puck.nether.net
> > > https://puck.nether.net/mailman/listinfo/juniper-nsp
> >
> 
> 
> --
> Kanagaraj Krishna
> Senior Network Engineer
> Network Engineering
> Applied Information Management Services Sdn. Bhd.
> (AIMS Sdn. Bhd.)
> Ground Floor, Menara Aik Hua,
> Changkat Raja Chulan,
> 50200 Kuala Lumpur,Malaysia.
> 
> Tel     : +603-20314988 Ext : 395
> Mobile  :  012-3266151
> Fax     : +603-20318948
> Email   : kanagaraj at aims.com.my