[c-nsp] 7604/sup32 (minor correction) - TCAM route aggregation

[Nicolas DEFFAYET]

On Wed, 2008-01-09 at 11:28 +0100, Gert Doering wrote:
Hi,

> On Wed, Jan 09, 2008 at 09:59:21AM +0100, Mohacsi Janos wrote:
> > We are using Sup32 with  12.2(18)SXF11 for more than 2.5 months without a 
> > problem (Earlier we used 12.2(18)SXF10) - of course without full routing 
> > table....
> 
> Have you been hit by "more prefixes in the RIB than would fit into TCAM"?

Hum, why Cisco don't create a software feature for be able to store
aggragated routes in the TCAM ?

<dream>
In the BGP routing table:
Prefix 192.168.0.0/24 AS65526
Prefix 192.168.1.0/24 AS65526
(but not 192.168.0.0/23)

so in the TCAM, we have:
Route 192.168.0.0/24 to x
Route 192.168.1.0/24 to x

# conf t
# tcam route-aggregation <- the magic command

after this command, in the TCAM, we have:
Route 192.168.0.0/23 to x

but in the BGP routing table we have still:
Prefix 192.168.0.0/24 AS65526
Prefix 192.168.1.0/24 AS65526
(but not 192.168.0.0/23)
</dream>

Many /24 are not aggregated but have the same routing policy.

-- 
Nicolas DEFFAYET