[c-nsp] How many maximum routes does Cisco 2900 router support?

Robert Hass robhass at gmail.com
Fri Jan 8 11:38:25 EST 2016

On Fri, Jan 8, 2016 at 3:23 PM, Adam Greene <maillist at webjogger.net> wrote:

> Our 2921 with a full routing table, 2GB RAM, and around 60M aggregate
> throughput hovers around 40-50% CPU utilization, with occasional higher
> spikes. When we were pushing >100M aggregate through it, the CPU was
> regularly spiking to near 100%.

Can you put 'show proc cpu history' and what IOS you're running ? How many
full-routing tables you're receiving from neighbors ?

> We have another one with multiple BGP sessions, 512MB RAM, but only a few
> actual routes. However, we are also running QoS policies on it, including
> NBAR. When aggregate throughput gets up near 100M, CPU tends to spike above
> 90%.

NBAR is very CPU consuming operation.


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