logging event link-status

[mattcisconet]

Is this enabled by default on Cisco IOS switch ports? What logging level will ensure I see link status in the router buffer log?

[thomuff]

I have two things One is Configuring UDLD which is enabled globally by default.

I usually set my logging level to debugging=Level 7. You will definitely see it.

If you have the opportunity, start at the highest level and go down until you don't see the log messages anymore.

http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_guide_chapter09186a008031ff90.html

http://www.cisco.com/en/US/products/hw/switches/ps5023/products_configuration_guide_chapter09186a00801cdea7.html

Hope this helps

[thomuff]

Right after I sent my last post, I found this

Interface up or down transitions and system restart messages, displayed at the notifications level. This message is only for information; switch functionality is not affected.

[mattcisconet]

Thanks for your reply.

I'm wondering if link up/down status is enabled by default with log level notification and above, what is the purpose of configuring the IOS command "logging event link-status"...is this only to be used when the log level is lower than notification and you still want to see link-status messages? I'm a little confused about it.

[thomuff]

logging event link-status global (global configuration)

To change the default switch-wide global link-status event messaging settings, use the

logging event link-status global command. Use the no form of this command to disable the link-status event messaging.

logging event link-status global

no logging event link-status global

Syntax Description

This command has no arguments or keywords.

Defaults

The global link-status messaging is disabled.

Command Modes

Global configuration

Command History

Release Modification

12.2(25)SG

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

If link-status logging event is not configured at the interface level, this global link-status setting takes effect for each interface.

Examples

This example shows how to globally enable link status message on each interface:

Switch# config terminal

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)# logging event link-status global

Switch(config)# end

Switch#

Related Commands

logging event link-status global (global configuration)

logging event link-status (interface configuration)

To enable the link-status event messaging on an interface, use the logging event link-status command. Use the no form of this command to disable link-status event messaging. Use the

logging event link-status use-global command to apply the global link-status setting.

logging event link-status

no logging event link-status

logging event link-status use-global

Defaults

Global link-status messaging is enabled.

Command Modes

Interface configuration

Command History

Release Modification

12.2(25)SG

Support for this command was introduced on the Catalyst 4500 series switch.

[thomuff]

so it looks like it is turned on by default on the interface configuration.