Refer to the exhibit. An engineer is troubleshooting an issue with an ISDN Primary Rate Interface. Which command produces this output?

The correct answer is C. show isdn service. The 'show isdn service' command displays the in-service/out-of-service maintenance state of individual ISDN B-channels on a PRI interface. Its output includes channel status columns (such as 'In Service,' 'Maint,' or 'Disabled') that correspond to what is shown in the exhibit. By

Troubleshooting

Question

Exhibit

Options

Ashow isdn history
Bshow isdn status
Cshow isdn service
Dshow isdn active

How the community answered

(37 responses)

A
5% (2)
B
3% (1)
C
92% (34)

Explanation

The 'show isdn service' command displays the in-service/out-of-service maintenance state of individual ISDN B-channels on a PRI interface. Its output includes channel status columns (such as 'In Service,' 'Maint,' or 'Disabled') that correspond to what is shown in the exhibit. By contrast, 'show isdn status' reports Layer 1/2/3 protocol states, 'show isdn active' lists currently active calls, and 'show isdn history' shows a log of past call detail records. None of those produce per-channel service-state output.

Topics

#ISDN PRI#show isdn service#IOS debug commands#PRI troubleshooting

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