[geeks] C2600 and routing

[Atomist]

James Fogg wrote:

>>What's the max amount of MBit a Cisco 2600 should be able to
>>route? The router's at 100% cpu load right now and only
>>getting 10mbit...
>>It's a 2621. That sound about right?
>>    
>>
>
>
>The published (sales department) values for packet routing is based on a
>router with no ACL's. As soon as you have an extended ACL (ACL # over
>99, meaning it does packet inspection and not just IP address
>descisions), you will clog the CPU. This happens because traffic is
>offloaded from ASIC (hardware) and dropped into software, which is
>terribly slow.
>
>I've seen a 3640 that struggled with 14mbs due to ACL's. That said,
>10mbs from a 2621 with a simple config is probably it's outer limit. I'd
>expect something more like 6-8mbs.
>
>Routers make terrible packet filters.
>
Yeah we have no ACL's on that. The 2621 was just for routing. Customers 
handle their own ACL's on their servers.
We replaced it with a 2821. That router kicks some serious ass. Dual 
GBit interfaces. Right now we have about 20mbit/s+ traffic and only 3-4% 
router load.

-- Atm