question on how to enable logging on a Cisco 2851 Router

[danny.lee]

Hi,

Network newbie here asking an embarrassing question on logging  We have a Cisco router with the following IOS version.  I want to enable logging; so do I need to configure event-log enable before adding the following logging configuration?

Cisco 2851 (revision 53.51) with 770048K/16384K bytes of memory.						xxxxxxxx#event-log ?
Processor board ID FTX1008C073						calibrate       Calibrate the platform clock
2 Gigabit Ethernet interfaces						circular       Enable/disable circular event log
32 Serial interfaces						disable         Disable event logging
1 terminal line						enable         Enable event logging
4 Channelized E1/PRI ports						init           (Re)Initialize event logging data structures
1 Virtual Private Network (VPN) Module						mark           Add a mark to the event log
1 cisco service engine(s)						platform-ticks Enable/disable platform ticks for clock
DRAM configuration is 64 bits wide with parity enabled.						save           Save event log to tftp host as elog.out
239K bytes of non-volatile configuration memory.						timelog         Time logging of 1000 events
62720K bytes of ATA CompactFlash (Read/Write)
Configuration register is 0x2102

logging buffered 5000000

no logging console

no logging monitor

logging trap warnings

logging source-interface Loopback0

logging xxxxxxxx logging buffered 5000000
no logging console
no logging monitor
logging trap warnings
logging source-interface Loopback0
logging xxxxxxxx

[Alessio Andreoli · Accepted solution]

hi there,

conf t

logg buff 50000 warnings ! This is the most info you can get

end

wr

!

show logg ! this command is for buffered logs.

I would change the dimension of the buffered logs because 5 MB are never useful on the router. better 50kb if you really want to have a lot of info

.

http://www.cisco.com/en/US/docs/ios/12_3/switch/command/reference/swi_e1.html#wp1098441

here something about an event-log option command

and here something more aout the logging command:

http://www.cisco.com/en/US/docs/ios/netmgmt/command/reference/nm_09.html

hope to answer

Alessio

[danny.lee]

Hi Alessio,

Thanks for the quick reply.  One more newby question; just what exactly does event-log do?  I tried to google it and can't find a good answer

[danny.lee]

Hi Alessio,

Please disregard my pevious question, as  i didn't see the links to event-log and logging commands.  Once again thanks for your help.

Regards,

Dan Lee