Re: Change the AS number ? *answer*

From: Cristian Henry H (chenry@reuna.cl)
Date: Tue Apr 01 2003 - 10:32:26 GMT-3

Yes, but in this case the peers are EBGP Confed and local-as doesn't
work!

ying c wrote:
>
> Hi,
>
> If you are peering EBGP peers, you can use local-as
> command. See
>
> http://www.cisco.com/en/US/customer/tech/tk826/tk365/technologies_configuration_example09186a00800949cd.shtml
>
> Chang
> --- Paul Lalonde <plalonde2@cogeco.ca> wrote:
> > Hi Christian,
> >
> > In your previous e-mail, you said R2 belonged to
> > AS100.
> >
> > In any event, you should only have to strip the
> > private AS with the
> > 'neighbor remove-private-as' command to strip the
> > private AS so that routes
> > appear to have originated from AS200. This would be
> > done on R3 to its
> > neighbor of R5.
> >
> > Paul
> >
> > ----- Original Message -----
> > From: "Cristian Henry H" <chenry@reuna.cl>
> > To: "Paul Lalonde" <plalonde2@cogeco.ca>
> > Cc: <ccielab@groupstudy.com>
> > Sent: Monday, March 31, 2003 8:23 PM
> > Subject: Re: Change the AS number ? *answer*
> >
> >
> > > The problem is R2 is already configured with
> > confederation, look the
> > > configuartions:
> > >
> > > (R2<---->R3)<----->(R5<----->R6)
> > > ( AS65000 AS65001 )
> > > ( AS200 )
> > >
> > > R2: (200.0.0.2)
> > >
> > > router bgp 65000
> > > no synchronization
> > > bgp confederation identifier 200
> > > network 192.128.2.2 mask 255.255.255.255
> > <---this have to be inserted
> > > in bgp process with AS 220!!!
> > > neighbor 200.0.0.3 remote-as 65000
> > > neighbor 200.0.0.3 ebgp-multihop 4
> > > neighbor 200.0.0.3 update-source Loopback0
> > >
> > > R3: (200.0.0.3)
> > >
> > > router bgp 65000
> > > no synchronization
> > > bgp confederation identifier 200
> > > bgp confederation peers 65001
> > > neighbor 200.0.0.2 remote-as 65000
> > > neighbor 200.0.0.2 ebgp-multihop 4
> > > neighbor 200.0.0.2 update-source Loopback0
> > > neighbor 200.0.0.5 remote-as 65001
> > > neighbor 200.0.0.5 ebgp-multihop 4
> > > neighbor 200.0.0.5 update-source Loopback0
> > > no auto-summary
> > >
> > > R5: (200.0.0.5)
> > >
> > > router bgp 65001
> > > no synchronization
> > > bgp confederation identifier 200
> > > bgp confederation peers 65000
> > > neighbor 200.0.0.3 remote-as 65000
> > > neighbor 200.0.0.3 ebgp-multihop 4
> > > neighbor 200.0.0.3 update-source Loopback0
> > > neighbor 200.0.0.6 remote-as 65001
> > > neighbor 200.0.0.6 ebgp-multihop 4
> > > neighbor 200.0.0.6 update-source Loopback0
> > >
> > > R6: (200.0.0.6)
> > >
> > > router bgp 65001
> > > no synchronization
> > > bgp confederation identifier 200
> > > neighbor 200.0.0.5 remote-as 65001
> > > neighbor 200.0.0.5 ebgp-multihop 4
> > > neighbor 200.0.0.5 update-source Loopback0
> > > no auto-summary
> > >
> > >
> > > Paul Lalonde wrote:
> > > >
> > > > Hi there,
> > > >
> > > > Easy. Configure R2 as a single confederation
> > member, with AS 100 being
> > the
> > > > private AS and AS 220 being the confederation
> > identifier AS.
> > > >
> > > > R2 will only be AS 100 to itself and will appear
> > to everyone else as AS
> > 220!
> > > >
> > > > eg.
> > > >
> > > > router bgp 100
> > > > bgp confederation-identifier 220
> > > > network 192.128.2.2 mask 255.255.255.255
> > > > neighbor xxxx...
> > > >
> > > > Hope this helps!
> > > > Paul
> > > > ----- Original Message -----
> > > > From: "Cristian Henry H" <chenry@reuna.cl>
> > > > Cc: <ccielab@groupstudy.com>
> > > > Sent: Monday, March 31, 2003 11:01 AM
> > > > Subject: Change the AS number ?
> > > >
> > > > > Hi everybody!
> > > > >
> > > > > R2 belong to AS 100, but now the question say:
> > > > >
> > > > > "on R2 create a loopback using the
> > 192.128.2.2/32 address and using
> > the
> > > > > AS 220 injects it into th BGP process"
> > > > >
> > > > > How Can I get that? Are there any way to
> > change the AS number before
> > > > > inject the route into de BGP process??
> > > > >
> > > > >
> > > > > --
> > > > > Cristian E. Henry
> > > > > REUNA
> > > > >
> > > > > E-mail: chenry@reuna.cl
> > > > > Fono: 56-2-3370336
> > > > >
> > >
> > > --
> > > Cristian E. Henry
> > > REUNA
> > >
> > > E-mail: chenry@reuna.cl
> > > Fono: 56-2-3370336
>
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-- 
Cristian E. Henry
REUNA

E-mail: chenry@reuna.cl
Fono: 56-2-3370336

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