From: Cameron, John (johcamer@cisco.com)
Date: Tue Feb 18 2003 - 16:47:51 GMT-3
Muyeen,
I agree with you that you may not want to do this in the real world - but
technically you can use
the aggregate-address command to announce networks that you learned from
other AS's. Please
see Halabi page 354-362. In his examples he takes 192.68.10.0/24 from AS2
and 192.68.11.0/24
from AS1 and summarizes them to 192.68.0.0/16 within AS3 and then announces
this summarization
to AS5.
JDC
C i s c o S y s t e m s John Cameron, AES EAST
Network Consulting Engineer
Research Triangle Park
|| || Cisco Systems, Inc.
|| || Phone: 919 392-3435
|||| |||| Pager: 800 365-4578
..:||||||:..:||||||:.. Email: cameron@cisco.com
-----Original Message-----
From: Muyeenp@aol.com [mailto:Muyeenp@aol.com]
Sent: Tuesday, February 18, 2003 2:22 PM
To: Cameron, John; love_cisco@hotmail.com; ccielab@groupstudy.com
Subject: Re: GBP Question
You cannot aggregate an address that does not belong to you. Here
150.50.31.0/24 belongs to AS100 not to AS200.
It is not recommended to remove or hide any AS number in its path. If you
do, you are disabling its loop avoidance feature.
M
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