Isdn Bri D Channel Monitoring


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© 2004 Cisco Systems, Inc. All rights reserved. BCRAN v2.1—6-5

Use the show interfaces bri privileged EXEC command without arguments to display information about the BRI interface D channel only.

Command syntax:

show interfaces bri number[:bchannel] | [first] [last] The arguments for the show interfaces bri command are shown in the following table.

show interfaces bri Command




Interface number.


(Optional) Colon (:) followed by a specific B channel number.


(Optional) Specifies the first of the B channels; the value can be either 1 or 2 for BRI.


(Optional) Specifies the last of the B channels; the value can only be 2 for a BRI.

The show interfaces bri command displays the first B channel on the BRI. The alternate value for this field is 2, which displays information about the second B channel. To display both B channels (first and last), enter show interfaces bri number 1 2.

If the router is an older platform and is a TE2 (non-native BRI with an external terminal adapter), use the show interfaces serial command.

Note that in the figure, line protocol is up (spoofing). This does not mean that the B channel is active, but that it is pretending, or spoofing, to be up. This is required because routes known through this interface would otherwise be removed from the routing table. This permits packets to be forwarded to the interface. Whether or not the packets trigger the link depends on the dialer list that is configured for the interface.

The number of resets is not important for ISDN connections.

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