Cisco 3020 - Cisco Catalyst Blade Switch Specifications download pdf (Page 432)

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Cisco Catalyst Blade Switch 3020 for HP Command Reference

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Chapter 2 Cisco Catalyst Blade Switch 3020 for HP Cisco IOS Commands

show udld

Table 2-27 show udld Field Descriptions

Field Description

Interface The interface on the local device configured for UDLD.

Port enable administrative

configuration setting

How UDLD is configured on the port. If UDLD is enabled or

disabled, the port enable configuration setting is the same as the

operational enable state. Otherwise, the enable operational setting

depends on the global enable setting.

Port enable operational state Operational state that shows whether UDLD is actually running on

this port.

Current bidirectional state The bidirectional state of the link. An unknown state appears if the

link is down or if it is connected to an UDLD-incapable device. A

bidirectional state appears if the link is a normal two-way connection

to a UDLD-capable device. All other values mean miswiring.

Current operational state The current phase of the UDLD state machine. For a normal

bidirectional link, the state machine is most often in the

Advertisement phase.

Message interval How often advertisement messages are sent from the local device.

Measured in seconds.

Time out interval The time period, in seconds, that UDLD waits for echoes from a

neighbor device during the detection window.

Entry 1 Information from the first cache entry, which contains a copy of echo

information received from the neighbor.

Expiration time The amount of time in seconds remaining before this cache entry is

aged out.

Device ID The neighbor device identification.

Current neighbor state The neighbor’s current state. If both the local and neighbor devices

are running UDLD normally, the neighbor state and local state

should be bidirectional. If the link is down or the neighbor is not

UDLD-capable, no cache entries appear.

Device name The device name or the system serial number of the neighbor. The

system serial number appears if the device name is not set or is set to

the default (Switch).

Port ID The neighbor port ID enabled for UDLD.

Neighbor echo 1 device The device name of the neighbors’ neighbor from which the echo

originated.

Neighbor echo 1 port The port number ID of the neighbor from which the echo originated.

Message interval The rate, in seconds, at which the neighbor is sending advertisement

messages.

CDP device name The CDP device name or the system serial number. The system serial

number appears if the device name is not set or is set to the default

(Switch).

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