snmp traps meaning

[wajid dabir]

can any one explain me the below snmp traps meaning

snmp-server enable traps tty

snmp-server enable traps cpu threshold

snmp-server enable traps config

snmp-server enable traps bridge newroot topologychange

snmp-server enable traps syslog

and which are the snmp traps cisco recommend to configure on network devices?

[paulstone80 · Accepted solution]

Hi,

snmp-server community Windows2009 RO - This is the SNMP community string, probably not a good idea to post this in a public forum!!

snmp-server enable traps tty                    

snmp-server enable traps cpu threshold

snmp-server enable traps config

snmp-server enable traps bridge newroot topologychange

snmp-server enable traps syslog

You can see what the different traps notify on here;

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094a05.shtml

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_configuration_example09186a0080094aa1.shtml?referring_site=smartnavRD

I'm not sure if there's a recommended set of traps you can configure, it really depends on your network and what level of visibility you need on your devices.

Personally, at a minimum I would want to know if the switch reboots (cold or warm reload) and if the cpu or memory are over utilised. I also want to know if the configuration has changed so I can audit this against our change management process.

HTH

Paul

[Anand G · Accepted solution]

Hi Wajid,

As you know, we have 2 community strings, public and private (by default) which is used for setting Read-Only (RO) and Read-write(RW).

Here in our case, we have configured the 1st line as RO type having the string value as 'Windows2009'.

tty - Sends Cisco enterprise-specific notifications when a TCP connection closes

cpu threshold - Enables CPU thresholding violation notification as traps and inform requests

config - This will be triggered when there is a router configuration changes.

bridge newroot topologychange - Generate STP bridge MIB traps.

It has the below keywords and its meaning:

newroot—(Optional) Enable SNMP STP Bridge MIB new root traps.

topologychange—(Optional) Enable SNMP STP Bridge MIB topology change traps.

syslog - enables the router to send system logging messages

The below are few of the references which may help you in taking a decision before you apply on a network.

http://www.cisco.com/en/US/docs/ios/12_1/configfun/command/reference/frd3001.html#wp1113568

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094a05.shtml#trps

Regards

Anand G (ag2)

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