Re: RES: [nsp] A BGP Question

From: Dave Bergum (bergum@mr.net)
Date: Mon Jul 10 2000 - 16:45:31 EDT


>>>>> On Mon, 10 Jul 2000 16:57:20 -0300, "Loureiro, Rodrigo" <rodrigo.loureiro@netstream.com.br> said:

  Rodrigo> OK. So if i set up the BGP process to use a private number, it wonīt be
  Rodrigo> included in the advertisementīs AS-Path field, am i correct? Could you
  Rodrigo> confirm the private ASes range.

I'd test it first. Might work. You'd probably not get it stripped until
the receiver announces routes to his peers with the remove private AS...I
think that the stripping probably happens prior to the sender adding his
local AS. There might not be any way to do this with cisco routers.

bergum@quark:~/ >arin 65000
Internet Assigned Numbers Authority
 (ASN-IANA-RSVD2-ASNBLOCK)
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   University of Southern California
   4676 Admiralty Way, Suite 330
   Marina del Rey, CA 90292-6695

   Autonomous System Name: IANA-RSVD2
   Autonomous System Block: 64512 - 65535
                            ^^^^^^^^^^^^^
   Coordinator:
      Internet Assigned Numbers Authority (IANA-ARIN) iana@IANA.ORG
      (310) 823-9358
Fax- (310) 823-8649

 

  Rodrigo> -----Mensagem original-----
  Rodrigo> De: Dave Bergum [mailto:bergum@mr.net]
  Rodrigo> Enviada em: segunda-feira, 10 de julho de 2000 16:52
  Rodrigo> Para: Loureiro, Rodrigo
  Rodrigo> Cc: cisco-nsp@puck.nether.net
  Rodrigo> Assunto: Re: [nsp] A BGP Question

>>>>> On Mon, 10 Jul 2000 09:45:40 -0300, "Loureiro, Rodrigo"
  Rodrigo> <rodrigo.loureiro@netstream.com.br> said:

  Rodrigo> Hi all,
  Rodrigo> Does anyone know if i can edit the as-path field regardless
  Rodrigo> prepending? I
  Rodrigo> mean, is it possible to delete an ASN from the as-path?

  Rodrigo> No, unless it is a private as, which you can strip with the
  Rodrigo> remove-private-AS neighbor config command.

  Rodrigo> Dave.



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