From: Sundar Palaniappan (sundar_palaniappan@hotmail.com)
Date: Mon Dec 23 2002 - 22:26:24 GMT-3
Jermey,
1. aggregate address 192.168.32.0 255.255.240.0 summary-only --> You are
advertising ony the summary 192.168.32.0/20. When you define summary only,
it does not advertise any other network falling in the aggregate range even
if you have explicit network statements configured.
For eg.
router bgp 1
network 192.168.35.0 mask 255.255.240.0
aggregate-address 192.168.32.0 255.255.255.0 summary-only
In the above case, you advertise just advertise the summary 192.168.32.0 and
not network 192.168.35.0 because of the summary-only string.
2. aggregate address 192.168.32.0 255.255.240.0 suppress-map not36 --> You
are summarizing the aggreate 192.168.32.0/20 except network 192.168.36.0.
Your purpose is served either way for this scenario. However, in the first
instance, you can't advertise any other network that falls in the aggregate
range. In the second instance, you can advertise other networks falling in
the aggregate range excepting 192.168.32.0/20.
Hope that helps!
--Sundar
>From: "Wright, Jeremy" <JA_WRIGHT@admworld.com>
>Reply-To: "Wright, Jeremy" <JA_WRIGHT@admworld.com>
>To: "'ccielab@groupstudy.com'" <ccielab@groupstudy.com>
>Subject: bgp aggregate suppress question
>Date: Mon, 23 Dec 2002 13:07:36 -0600
>
>are these basically accomplishing the same thing (except one is going to a
>particular neighbor)?
>
>aggregate address 192.168.32.0 255.255.248.0 summary-only
>
>access-list 1 permit 192.168.36.0
>
>route-map not36 permit 10
> match ip address 1
>
>neighbor x.x.x.x unsuppress-map not36
>
>
>
>OR:::
>
>
>aggregate address 192.168.32.0 255.255.248.0 suppress-map not36
>
>access-list 1 permit 192.168.36.0
>
>route-map not36 deny 10
> match ip address 1
>route-map not36 permit 20
>.
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