Performance impact of enabling "Logging buffered 5" on a Cisco 26xx router
Posted on 2009-02-08
I have a Cisco 26xx router (2 WAN ports & one LAN port).
Currently logging is not enabled, so when doing "show log" nothing was shown.
There's been cases of the router flipping (think HSRP flipping) but we don't know
if it's the Telco's leased line that caused it or the router itself, thus my idea of
I intend to do the following :
> show memory exec (to get free memory)
> logging buffered Half_Free_Available Memory 5
(level 5 messages & below, leaving out informational ones).
We have 2 x 2Mbps links connected between local site & remote site.
Pls give your thoughts whether the performance of the 2 pairs (1 pair at our end
& 2 more pairs at the other end) of Cisco routers would be affected as I'm setting
logs to use half of the available memory.
Not in time to set the logging to log to a syslog server but would doing so (to a
remote syslog) help?
Kindly give ideas what's the optimal value to set for the logging (amt of memory)
as well as the message levels (0-7 : just want to log cases of interfaces timed
out or flipping or router itself causing a HSRP switch). What to check for CPU
(sh proc cpu?)
Basically we don't want performance to users to be affected due to logging
being enabled on routers