Show Udld - Cisco Catalyst 2950 Command Reference Manual

show udld

show udld
Use the show udld user EXEC command to display UniDirectional Link Detection (UDLD) status for
all ports or the specified port.
Syntax Description
interface-id
| begin
| exclude
| include
expression
Command Modes User EXEC
Command History Release
12.0(5.2)WC(1)
Usage Guidelines If you do not enter an interface-id, the administrative and the operational UDLD status for all interfaces
appear.
Expressions are case sensitive. For example, if you enter | exclude output, the lines that contain output
do not appear, but the lines that contain Output appear.
Examples
This is an example of output from the show udld gigabitethernet0/1 command. In this example, UDLD
is enabled on both ends of the link, and UDLD detects that the link is bidirectional.
the fields in this example.
Switch> show udld gigabitethernet0/1
Interface gi0/1
---
Port enable administrative configuration setting: Follows device default
Port enable operational state: Enabled
Current bidirectional state: Bidirectional
Current operational state: Advertisement - Single Neighbor detected
Message interval: 60
Time out interval: 5
Catalyst 2950 Desktop Switch Command Reference
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show udld [interface-id] [ | {begin | exclude | include} expression]
(Optional) ID of the interface and port number. Valid interfaces include
physical ports and VLANs. The VLAN range is 1 to 4094 when the
enhanced software image (EI) is installed and 1 to 1001 when the standard
software image (SI) is installed. Do not enter leading zeros.
(Optional) Display begins with the line that matches the specified
expression.
(Optional) Display excludes lines that match the specified expression.
(Optional) Display includes lines that match the specified expression.
Expression in the output to use as a reference point.
Modification
This command was first introduced.
Entry 1
Expiration time: 146
Device ID: 1
Current neighbor state: Bidirectional
Device name: 0050e2826000
Port ID: Gi0/2
Chapter 2 Cisco IOS Commands
Table 2-15 describes
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