[j-nsp] BGP extended community attribute

[Richmond, Jeff (ELI)]

I went through this a while back when I was designing our rollout. My own personal preference was for ip address, using the lo0.0 address. Why? It just makes it nice and easy to identify the originating router when looking at a route and its communities. There are valid reasons for using AS number though too, not the least of which is getting more space for the Administrator variable (2 vs 4 octets, since it requires only 2 octets for AS value versus 4 for IP address).

Regards,
-Jeff


-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net]On Behalf Of jjsyed at aol.com
Sent: Friday, June 17, 2005 9:30 AM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] BGP extended community attribute


Hi,
 
There are two format to define extended community value, AS:VAL and ip-address-VAL
 
Which one is better then other entirely depend upon the design and specific requirements. I am wondering if any of you have any thoughts which one is  widely used in the industry and also shed some lights on pros and cons for each other. 
 
thanks in advance 
 
JS
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