From: Jeff Mullan (jmullan78@gmail.com)
Date: Thu Mar 22 2007 - 01:39:23 ART
Hey, Can you cut paste the exact question from the Work book pls ? ( Hope
not a breach of a Vendor NDA )
On 3/21/07, ian <iyux2000@gmail.com> wrote:
>
> M.Kerem Gursu,How are you！
>
> Yes. Local-as does solve the problem. But it is required that
> certain configurations must be done on both side to accommodate this
> situation. Therefore, consider the following situation: If the question
> don't allow you to configure it on peer side, can we prepend any as-number
> on the most-right side of any BGP route manully and locally.
>
> ======= 2007-03-20 21:24:27 What you've mentioned in your letter：=======
>
> >Hi ,
> >
> >I think "local-as" would give the same result as route-map .
> >
> >
> >R1#sh run | beg router bgp
> >router bgp 254
> > no synchronization
> > bgp router-id 50.7.7.7
> > bgp log-neighbor-changes
> > network 100.100.100.0 mask 255.255.255.0
> > neighbor 12.12.30.6 remote-as 2
> > neighbor 12.12.30.6 local-as 253
> > no auto-summary
> >!
> >ip route 100.100.100.0 255.255.255.0 Null0
> >
> >R1#sh ip bgp
> >BGP table version is 2, local router ID is 50.7.7.7
> >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
> >*> 100.100.100.0/24 0.0.0.0 0 32768 i
> >
>
> >----------------------------------------------------------------------------------
> >
> >R2#sh run | beg router bgp
> >router bgp 2
> > no synchronization
> > bgp router-id 50.6.6.6
> > bgp log-neighbor-changes
> > neighbor 12.12.30.7 remote-as 253
> > no auto-summary
> >
> >R2#sh ip bgp
> >BGP table version is 6, local router ID is 50.6.6.6
> >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
> >*> 100.100.100.0/24 12.12.30.7 0 0 253 254 i
> >
> >
> >
> >> ----- Original Message -----
> >> From: "Pierre-Alex" <paguanel@hotmail.com>
> >> To: "Jeff Mullan" <jmullan78@gmail.com>, achievewoo@gmail.com
> >> Subject: Re: AS-Path manipulation
> >> Date: Mon, 19 Mar 2007 20:28:44 +0100
> >>
> >>
> >> It seems to me that if you do this you will get 253 254i rather
> than 254
> >> 253i because prepend will add before your AS not after.
> >>
> >> Try "local-as" to solve this problem ...
> >>
> >> Pierre-Alex
> >>
> >> ----- Original Message -----
> >> From: "Jeff Mullan" <jmullan78@gmail.com>
> >> To: <achievewoo@gmail.com>
> >> Cc: <ccielab@groupstudy.com>
> >> Sent: Monday, March 19, 2007 12:10 AM
> >> Subject: Re: AS-Path manipulation
> >>
> >>
> >> > Can you try a route-map inbound on R2 like this and see if it works :
> >> >
> >> > route-map AS_PATH_PREPEND permit 10
> >> > set as-path prepend 253
> >> >
> >> >
> >> >
> >> > On 3/18/07, achievewoo@gmail.com <achievewoo@gmail.com> wrote:
> >> > >
> >> > > Hi group,
> >> > > I met difficoulty about AS-path.
> >> > > Here is the situation.
> >> > > R1----R2
> >> > > R1 in AS 254
> >> > > R2 in AS 2
> >> > > R1 advertised one route to R2 by BGP
> >> > > On R2, show ip bgp
> >> > >
> >> > > Network Next Hop Metric LocPrf Weight Path
> >> > > *> 100.100.100.0 192.168.1.254 0 0
> 254 i
> >> > >
> >> > > I was required to configure R2 and prepand AS 253 after 254.
> >> > > The output should like this:
> >> > > Network Next Hop Metric LocPrf Weight Path
> >> > > *> 100.100.100.0 192.168.1.254 0 0
> 254
> >> 253i
> >> > >
> >> > > Could anyone can help me solve it?
> >> > >
> >> > >
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> >> >
> >> >
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>
>
> Have a nice day.
>
>
> ian
> iyux2000@gmail.com
> 2007-03-22
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