Re: Removing public ASN from path

Well, you can't delete or swap "any". You can modify your AS behavior, being
it your "process AS" (router bgp ASN) or your "alternative" (neighbor
local-as).

Other than those you really can't do much (besides hidding then with
aggregates...)

On Wed, Jul 20, 2011 at 12:17 PM, Vladimir Osipenko <tiffolk_at_gmail.com>wrote:

> Well, I meant "how to do" this kind of staff. How to delete or swap
> any public AS with another one?
>
> On 20 July 2011 18:01, Persio Pucci <persio_at_gmail.com> wrote:
> > Vladimir,
> > not like that. You have to have an eBGP session established under "router
> > bgp Z" using "neighbor B local-as X", which means the other side has your
> > peer configure as "neighbor A remote-as X". By doing that, your routes
> > originated on your Z AS will be sent with a AS PATH of "X Z". If you want
> > them only to have "X" on the AS PATH, then you can use "local-as X
> > no-prepend replace-as".
> > Makes sense?
> >
> > On Wed, Jul 20, 2011 at 10:42 AM, Vladimir Osipenko <tiffolk_at_gmail.com>
> > wrote:
> >>
> >> And can you replace AS number with any other AS number?
> >>
> >> On 20 July 2011 16:49, Persio Pucci <persio_at_gmail.com> wrote:
> >> > right on the money!
> >> >
> >> > worst part is now that you have mentioned I remember I have even used
> >> > that
> >> > command before... :/
> >> >
> >> > tks again :)
> >> >
> >> > On Wed, Jul 20, 2011 at 9:34 AM, Daniel Dib <daniel.dib_at_reaper.nu>
> >> > wrote:
> >> >
> >> >> On on, jul 20, 2011 at 14:19:43, Persio Pucci wrote:
> >> >> > Subject: Removing public ASN from path
> >> >> >
> >> >> > Hi folks,
> >> >> >
> >> >> > I have a connection to a financial service where they will only
> allow
> >> >> > to receive routes from the private ASN (e.g. 65000) they have
> >> >> > assigned
> >> >> > me. My problem is that I am generating these routes from one router
> >> >> > that is already running my public ASN (e.g. 100). I am using
> >> >> > "neighbor
> >> >> > local-as 65000" to establish connection to the financial service,
> but
> >> >> > they are dropping my routes because they have the AS_PATH as "100
> >> >> > 65000". I need them to go as "65000" only.
> >> >> >
> >> >> > Is there anyway to force IOS send this particular route as if it
> was
> >> >> > generated by the ASN I am *pretending* to be on the "local-as"
> >> >> > command?
> >> >> > I have tried aggregate-address but it does not seems to help here.
> >> >> >
> >> >> > Persio
> >> >>
> >> >> Hi Persio,
> >> >>
> >> >> Try using the replace-as command. Neighbor x.x.x.x local-as 65000
> >> >> replace-as. You can find the documentation for this @
> >> >>
> >> >>
> >> >>
> http://www.cisco.com/en/US/partner/docs/ios/iproute_bgp/command/reference/ir
> >> >> g_bgp3.html#wp1107625
> >> >>
> >> >> HTH
> >> >>
> >> >> Daniel
> >> >
> >> >
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> >> >
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Received on Wed Jul 20 2011 - 16:11:46 ART