Bob,
You'll see here how an update message looks like (Lab Tests).
Basically, all the NLRI (prefixes) that have the same
attributes are gouped in the same update message. In this
example, the update message total length is 4 KB.
Hope this helps.
- Kisito
Dec 1 10:33:21 BGP RECV 194.168.6.2+56461 -> 194.168.6.1+179
Dec 1 10:33:21 BGP RECV message type 2 (Update) length 4094
Dec 1 10:33:21 BGP RECV flags 0x40 code Origin(1): IGP
Dec 1 10:33:21 BGP RECV flags 0x40 code ASPath(2): 60000 500 400 300 200
100
Dec 1 10:33:21 BGP RECV flags 0x40 code NextHop(3): 194.168.6.2
Dec 1 10:33:21 BGP RECV flags 0x80 code MultiExitDisc(4): 5
Dec 1 10:33:21 BGP RECV 195.204.244/24, 195.204.245/24,
195.204.246/24,
195.204.247/24
Dec 1 10:33:21 BGP RECV 195.204.248/24, 195.204.249/24,
195.204.250/24,
195.204.251/24
Dec 1 10:33:21 BGP RECV 195.204.252/24, 195.204.253/24,
195.204.254/24,
195.204.255/24
...etc ...
>From: Bob Hunter <bobjhunter@^yahoo^.com>
>Reply-To: Bob Hunter <bobjhunter@^yahoo^.com>
>To: [EMAIL PROTECTED]
>Subject: BGP Update Message Contents?
>Date: Tue, 28 Nov 2000 08:06:11 -0600
>
>Hi,
>
>I haven't had a chance to run this through a sniffer yet to examine the
>packets, but am wondering if someone could help me understand the
>rfc1771 reference to BGP update messages. When a BGP update messages is
>sent describing a route, are several update messages sent, each with a
>singular path attribute flag, and attribute type code, or does one
>update message contain all of the path attributes, and codes within one
>segment?
>The rfc1771 seams to read plural by stating variable length sequence of
>path attributes.
>
>Thank you for your assistance.
>
>
>_________________________________
>FAQ, list archives, and subscription info:
>http://www.groupstudy.com/list/cisco.html
>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_____________________________________________________________________________________
Get more from the Web. FREE MSN Explorer download : http://explorer.msn.com
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
