[c-nsp] unsuppress-map : is this correct?

[Paolo Lucente]

Hi Tassos,

i believe it's a little bit more subtle: when selectively supppressing BGP prefixes, you need
to be careful un-suppressing only a subset (or the very same set as in the example you picked
up, both suppress and un-suppress refer to route-map "map1") of what you have previously
suppressed. Don't know whether this is what you are doing currently.

aggregate-address itself doesn't suppress anything and usual applications of the unsuppress-map
are typically in conjunction with an aggregate-address summary-only - which in turn suppresses
"everything" and this is why in this specific case you can go loose with the un-suppress map.

Also because route-maps allow negations aswell, maybe you can find useful playing around other
maps related to BGP summarization like advertise-map and suppress-map instead.

Cheers,
Paolo

On Sat, Nov 10, 2007 at 06:44:02PM +0200, Tassos Chatzithomaoglou wrote:
> According to:
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hirp_r/rte_bgh2.htm#wp1115114
> 
> "To selectively advertise routes previously suppressed by the aggregate-address command, use the 
> neighbor unsuppress-map command in address family or router configuration mode".
> 
> Which, if i understand correctly, means that whatever route-map you use in unsuppress-map, it only 
> influences the prefixes that were suppressed by using the "aggregate-address" command.
> 
> I have a case where i use this command and although the specific network i define in the route-map 
> is correctly unsuppressed, all the other networks (which were not being summarized, but were being 
> advertised) are now suppressed. Am i doing something wrong?
> 
> -- 
> Tassos