Cisco Catalyst 2960 Series User Manual

Default SettingFeature
DisabledUDLD aggressive mode
Related Topics
Enabling UDLD Globally , on page 399
Enabling UDLD on an Interface , on page 400
How to Configure UDLD
Enabling UDLD Globally
Follow these steps to enable UDLD in the aggressive or normal mode and to set the configurable message
timer on all fiber-optic ports on the switch.
SUMMARY STEPS
1.
configure terminal
2.
udld {aggressive | enable | message time message-timer-interval}
3.
end
DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode.configure terminal
Example:
Switch# configure terminal
Step 1
Specifies the UDLD mode of operation:udld {aggressive | enable | message
time message-timer-interval}
Step 2
• aggressive—Enables UDLD in aggressive mode on all fiber-optic ports.
Example:
Switch(config)# udld enable
• enable—Enables UDLD in normal mode on all fiber-optic ports on the
switch. UDLD is disabled by default.
An individual interface configuration overrides the setting of the udld
enable global configuration command.
message time 10
• message time message-timer-interval—Configures the period of time
between UDLD probe messages on ports that are in the advertisement
phase and are detected to be bidirectional. The range is from 1 to 90
seconds; the default value is 15.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
399
How to Configure UDLD

Cisco Catalyst 2960 Series Specifications

General

Layer	Layer 2
Power over Ethernet (PoE)	Available on some models
RAM	128 MB
Flash Memory	32 MB
MAC Address Table Size	8000
Operating Temperature	0°C to 45°C (32 to 113°F)
Ports	24 or 48 x 10/100/1000