Alcatel Carrier Internetworking Solutions omniswitch User Manual

Working with SNMP Traps

Using SNMP

page 10-30

OmniSwitch 6600 Family Switch Management Guide

The authentication trap is sent when an SNMP authentication failure is detected. This trap is a signal to the 
management station that the switch received a message from an unauthorized protocol entity. This 
normally means that a network entity attempted an operation on the switch for which it had insufficient 
authorization. When the SNMP authentication trap is enabled, the switch will forward a trap to the 
management station. The following command will enable the authentication trap:

-> snmp authentication trap enable

The trap will be suppressed if the SNMP authentication trap is disabled. 

Several CLI commands allow you to control trap forwarding from the agent in the switch to the SNMP 
management station. 

The switch normally stores all traps that have been sent out to the SNMP management stations. You can 
list the last stored traps by using the 

 command. This command lists the traps 

along with their sequence number. The sequence number is a record of the order in which the traps were 
previously sent out. 

You may want to replay traps that have been stored on the switch for testing or troubleshooting purposes. 
This is useful in the event that any traps are lost in the network. To replay stored traps, use the snmp trap 
replay command followed by the IP address for an SNMP management station. This command replays (or 
re-sends) all stored traps from the switch to the specified management station on demand. 

If you do not want to replay all of the stored traps, you can specify the sequence number from which the 
trap replay will start. The switch will start the replay with a trap sequence number greater than or equal to 
the sequence number given in the CLI command. The number of traps replayed depends on the number of 
traps stored for this station.

The switch may send the same traps to the management station many, many times. You can suppress the 
transmission of identical repetitive traps by issuing the 

 command. When trap 

absorption is enabled, traps that are identical to traps previously sent will be suppressed and therefore not 
forwarded to the SNMP management station. The following command will enable SNMP trap absorption.

-> snmp trap absorption enable

To view or verify the status of the Trap Absorption service, use the 

 command.

When WebView forwarding is enabled, all traps sent by switch applications are also forwarded to 
WebView. The following command allows a WebView session to retrieve the trap history log.

-> snmp trap to webview enable