Re: Private ASN's

From: Jesper Skriver (jesper@skriver.dk)
Date: Fri Jan 11 2002 - 12:34:03 EST


jesper@testnxj4> show route martians

inet.0:
             0.0.0.0/0 exact -- allowed
             0.0.0.0/8 orlonger -- disallowed
             127.0.0.0/8 orlonger -- disallowed
             128.0.0.0/16 orlonger -- disallowed
             191.255.0.0/16 orlonger -- disallowed
             192.0.0.0/24 orlonger -- disallowed
             223.255.255.0/24 orlonger -- disallowed
             240.0.0.0/4 orlonger -- disallowed
             192.168.0.0/16 orlonger -- disallowed
             10.0.0.0/8 orlonger -- disallowed
             172.16.0.0/12 orlonger -- disallowed

Those are the default martians, and any routing information for
these prefix'es will be dropped.

On Fri, Jan 11, 2002 at 11:31:51AM -0600, Borchers, Mark wrote:
> Done that and more. I can verify the advertisement on
> the Cisco sending the route (sh ip bgp nei <M160> adv).
> But I don't see it on the M160, even after removing all
> policy from my IBGP group and clearing the session.
>
> Can you tell me: does sh route received-prot bgp output
> all of the neighbor's advertisements, or only those which
> were put in the table after policy was applied?
>
> TIA,
> Mark
>
> > -----Original Message-----
> > From: Dave Qi [mailto:dqi@bloomberg.com]
> > Sent: Friday, January 11, 2002 11:26 AM
> > To: Guy Davies; Borchers, Mark; juniper-nsp@puck.nether.net
> > Subject: RE: Private ASN's
> >
> >
> > also , do show route receive-protocol bgp <bgp peer ip
> > address> <prefix in
> > question> to see if you are indeed received the prefix on the juniper
> > router.
> >
> > -dave
> >
> > -----Original Message-----
> > From: Guy Davies [mailto:Guy.Davies@telindus.co.uk]
> > Sent: Friday, January 11, 2002 12:16 PM
> > To: 'Borchers, Mark'; 'juniper-nsp@puck.nether.net'
> > Subject: RE: Private ASN's
> >
> >
> >
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > What's the prefix? By default, the Junipers won't discard prefixes
> > just because they're using private ASNs. However, there is a list of
> > martian prefixes which automatically get discarded. Try "show route
> > martians" to get a list.
> >
> > Regards,
> >
> > Guy
> >
> > > -----Original Message-----
> > > From: Borchers, Mark [mailto:mborchers@splitrock.net]
> > > Sent: Friday, January 11, 2002 5:12 PM
> > > To: 'juniper-nsp@puck.nether.net'
> > > Subject: Private ASN's
> > >
> > >
> > > We have an IBGP mesh consisting of a mixture of Ciscos and
> > > Junipers. A prefix from a downstream to whom we assigned a
> > > private ASN is being accepted by the Cisco routers but appears
> > > to be getting discarded by the Junipers. Can anybody confirm
> > > if this is the default *IBGP* behavior for prefixes containing
> > > private ASNs in the path? I'm not finding anything helpful
> > > on www.juniper.net.
> > >
> > > --
> > > Mark Borchers McLeodUSA Data Services
> > > IP Engineering 9012 New Trails Dr.
> > > mborchers@splitrock.net The Woodlands, TX 77381
> > > (281) 465-1931 http://www.mcleod.net/
> > >
> >
> > -----BEGIN PGP SIGNATURE-----
> > Version: PGP 7.0.1
> >
> > iQA/AwUBPD8dzY3dwu/Ss2PCEQKJbACgz3awCwg57Tu56nah/ue5Ut0XcWcAoLRj
> > UhLZr5E8dmyGIGHRYk/sa6D/
> > =51TS
> > -----END PGP SIGNATURE-----
> >
> >
> > .
> >
> >
> >
>

/Jesper

-- 
Jesper Skriver, jesper(at)skriver(dot)dk  -  CCIE #5456
Work:    Network manager   @ AS3292 (Tele Danmark DataNetworks)
Private: FreeBSD committer @ AS2109 (A much smaller network ;-)

One Unix to rule them all, One Resolver to find them, One IP to bring them all and in the zone to bind them.



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