How to configure syslog on Cisco routers

These instructions assume:

• The router is running a minimum of IOS version 12.0(22)S, 12.2(14)S, or 12.2(15)T.
• The date, time and time zone are correctly set on the router.
• You have Telnet or SSH credentials and access to your Cisco router.
• The IP address of your Auvik collector is known. You can find this in the Syslog > Summary tab in the Export Information column.

Configure syslog

1. Telnet or SSH into your router.
2. Enter privileged mode by typing enable and entering your enable password.
3. Run the following commands: 

configure terminal
logging host Auvik collector IP
logging trap warnings
end
write memory

We recommend the adding following to make IOS messages interoperate better with the syslog protocol. Disable an extra timestamp and sequence numbers:

no service sequence-numbers
no service timestamps debug uptime
no service timestamps log uptime

For more information:
https://www.ciscopress.com/articles/article.asp?p=426638&seqNum=3