Example 937 show isdn history Command Output

r5#show isdn history

ISDN CALL HISTORY History table has a maximum of 100 entries.

History table data is retained for a maximum of 15 Minutes.

Call Calling Called

Type Number Number

Remote Seconds Seconds Seconds Charges

Name Used Left Idle Units/Currency

8358661

r5#ping 192.168.9.21

Sending 5, 100-byte ICMP Echos to 192.168.9.21, timeout is 2 seconds: .!!!!

r5#show isdn history

ISDN CALL HISTORY

History table has a maximum of 100 entries.

History table data is retained for a maximum of 15 Minutes.

Call Calling Called Remote Seconds Seconds Seconds Charges

Type Number Number Name Used Left Idle Units/Currency

Out 8358661 r6 56 0

Out 8358661 r6 10 46 8 0

This router has always been on the initiating side of setting up the ISDN call parameters. Feel free r6 to isitiate the call an d the n repeat the history command on r6 to see the difference. It should a additional inbound call. Another similar command is show isdn active to see just the active call.

NOTE

Remember that ISDN has its own Layer 2 and Layer 3. ISDN Layer 3 is for signaling and has noth ing to do wit h the bearer payload being IP Layer 3. Q931 deals; with end-to-end call setup but there is no LaTer 3 address. The E. 1 64 phone numper would be Iikee your MAh address on LAN, which technically! makes ISDN part of the Layer 2 Daea Link Layer kealm.

Just like debug isdn q921 shows the details of ISDN Layer 2, you can troubleshoot ISDN Layer 3

information with debug isdn q931. Use it to check call setup parameters such as SPIDs and phon numbers. In Example 9-38, issue it on r5 to watch the normal activity of ISDN Layer 3.

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