[nsp] L3 and Full BGP?

[Stephen J. Wilcox]

On Sun, 19 Jan 2003, Pavel Narozhniy wrote:

> Stephen J. Wilcox wrote:
> 
> >In my limited experience with 3550 you -may- get it to hold the table in memory
> >but the sdm is limited in size and you will not be able to hold all the routes
> >in the sdm meaning you fallback to process switching and regularly generated
> >warning messages.
> >  
> >
> 
> Quoting from 
> http://www.cisco.com/en/US/products/hw/switches/ps646/products_data_sheet09186a00800913d7.html
> 
>     * 64 MB DRAM and 16 MB Flash memory
> 
>     * Configurable up to 12,000 MAC addresses (Catalyst 3550-12G and
>       3550-12T), Configurable up to 8,000 MAC addresses (Catalyst
>       3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and3550-24-FX)
> 
>     * Configurable up to 24,000 unicast routes (Catalyst 3550-12G and
>       3550-12T), Configurable up to 16,000 unicast routes (Catalyst
>       3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)
> 
> 
> Current number of BGP prefixes is 117799, according to my router. If 
> number of routes, specifed above (24 000), is not hardware limitation, I 
> don't think that full view will fit in 64MB RAM :(

Indeed now I recall! 24000 then is the maximum cache size on the sdm - when
reconfigured. By default I think its about 12000 but if you sacrifice some of
the other areas you can increase it to the max (other areas being MACs, IPX,
etc)

THe memory will hold more but it will fail on sdm and process switch.

Steve

 > 
> 
> 
> 
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