From: Russell Lusignan (rlusignan@xxxxxxxxxxxxxxx)
Date: Sun May 06 2001 - 15:19:25 GMT-3
Sure, when you get a lab and they ask:
advertise a summary route to R6 but exclude the subnet x.x.x.x from the
summary.
In practical use, you may want to advertise a summary to your upstream
providers so they announce that summary to their peers, but you may want
your upstream to see all of your subnets, not just the summary. Stick the
no-export community on the subnets (not the summary) and they will not
re-advertise those subnets to their peers, only the summary. Halabi's book
covers this I think.
> -----Original Message-----
> From: Ccieyet2b@aol.com [mailto:Ccieyet2b@aol.com]
> Sent: Sunday, May 06, 2001 11:08 AM
> To: ccielab@groupstudy.com
> Subject: BGP - aggregate-address options
>
>
> Hi,
>
> The aggregate-address x.x.x.x <mask> [options] command
> includes several
> possible options including: summary-only; suppress-map,
> advertise-map.
>
> While it's legal to have multiple options, is there any
> reason to include the
> summary-only option in combination with either the suppress
> or advertise
> option? Wouldn't including the suppress or advertise option
> over ride the
> summary-only option? And, if so, would there be any reason
> to include it?
>
> Jim
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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