From: Mike Haddad (mike.haddad@hotmail.com)
Date: Sun Mar 09 2008 - 17:29:37 ARST
Thanks Pandi greatly appreciated. As per the below the no-prepend is being
filtered out to the neighbor. I am also going to lab it with a remote peer who
is within the same AS (AS 100) to see the difference. > Date: Sat, 8 Mar 2008
21:50:20 -0500> From: moorthypandi@gmail.com> To: mike.haddad@hotmail.com>
Subject: Re: local-as no-prepend Question> CC: ccielab@groupstudy.com> > HI> >
Here is my understanding> > > > 100 200 300 (Net: 192.168.1.0/24)> > (R1)
-------------- (R3) ------------------- (R2)> > > > Lets say R3 is configured
to use "local-as 100" for its R2 peering (neighbor> 10.2.2.2 local-as 100
no-prepend).> > > > Now R3 is receiving the route from R2 for net
192.168.1.0/24, see the test> result for with and without no-prepend.> > > > >
> Without no-pre-pend config:> > ------------------------------------> > > >
Rack1R3#show ip bgp> > BGP table version is 4, local router ID is 10.2.2.3> >
Status codes: s suppressed, d damped, h history, * valid, > best, i ->
internal,> > r RIB-failure, S Stale> > Origin codes: i - IGP, e - EGP, ? -
incomplete> > > > Network Next Hop Metric LocPrf Weight *Path*> > *>
192.168.1.0 10.2.2.2 0 0 *100> 300 i*> > Rack1R3#> > > > > > > > > > With
no-pre-pend config:> > ----------------------------------> > Rack1R3#show ip
bgp> > BGP table version is 2, local router ID is 10.2.2.3> > Status codes: s
suppressed, d damped, h history, * valid, > best, i -> internal,> > r
RIB-failure, S Stale> > Origin codes: i - IGP, e - EGP, ? - incomplete> > > >
Network Next Hop Metric LocPrf Weight *Path*> > *> 192.168.1.0 10.2.2.2 0 0
*300 i> *> > Rack1R3#> > > Looks like R3 not append the AS100 into as-path for
this prefix learned from> R2> > Regards> Pandi> > On Sat, Mar 8, 2008 at 5:54
PM, Mike Haddad <mike.haddad@hotmail.com> wrote:> > > Hello,> >> > When we
issue the command "neighbor 150.1.2.2 local-as 200 no-prepend",> > does> >
this mean do not prepend the AS200 inbound or outbound?> >> > Thanks,> >> >
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