Router Load

Piping process output using the following command comes in handy when troubleshooting router load:

(config)# show process cpu | excl 0.00%_0.00%_0.00%

However, this will list only CPU active/consuming processes. You can save precious time by also mapping an alias using the following:

(config)# alias exec ps show proc cpu | excl 0.00%_0.00%_0.00%

SSH Problems

If you experience problems connecting to your router through Secure Shell (SSH), it might be due to the hostname and router’s Domain Name System (DNS). If you generate RSA keys before you configure the hostname and domain, SSH won’t work. Remove and regenerate keys.

From config mode, remove keys with this command:

crypto key zeroize rsa

Generate new keys:

crypto key generate rsa

Verify keys:

sh crypto key your-public-key rsa

Between other lines, the output should now contain: Key name: router_hostname.yourdomain. This will enable your SSH connection.

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