Chapter 15
| UniDirectional Link Detection Commands
– 414 –
show udld This command shows UDLD configuration settings and operational status for the
switch or for a specified interface.
Syntax
show udld [interface interface]
interface
ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-12/28)
Command Mode
Privileged Exec
Example
Console#show udld
Message Interval : 15
Interface UDLD Mode Oper State Msg Invl
Port State Timeout
--------- -------- ---------- ------------------------------------- --------
Eth 1/ 1 Enabled Aggressive Advertisement 15 s
Bidirectional 5 s
Eth 1/ 2 Disabled Normal Disabled 7 s
Unknown 5 s
Eth 1/ 3 Disabled Normal Disabled 7 s
Unknown 5 s
Eth 1/ 4 Disabled Normal Disabled 7 s
Unknown 5 s
Eth 1/ 5 Disabled Normal Disabled 7 s
Unknown 5 s
.
.
.
Console#show udld interface ethernet 1/1
Interface UDLD Mode Oper State Msg Invl
Port State Timeout
--------- -------- ---------- ------------------------------------- --------
Eth 1/ 1 Enabled Aggressive Advertisement 15 s
Bidirectional 5 s
Console#
Table 86: show udld - display description
Field Description
Message Interval The interval between UDLD probe messages for ports in advertisement phase
UDLD Shows if UDLD is enabled or disabled on a port
Mode Shows if UDLD is functioning in Normal or Aggressive mode
Oper State Shows the UDLD operational state (Disabled, Link down, Link up,
Advertisement, Detection, Disabled port, Advertisement - Single neighbor,
Advertisement - Multiple neighbors)
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