IP Expert ISDN Question

From: William Wong Kun Sing (wong_kunsing@xxxxxxxxxxxxxxxxx)
Date: Tue Aug 13 2002 - 05:00:10 GMT-3

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Dear all CCIE and 2b

I have come across this question in my test lab which say that:

"Make sure only IP is allowed when the ISDN line is up".

What does it mean?

The Bri0 interface only have ip address and there are no any routing
protocol running on it. Should I use any access list to allow only IP or
what should I do?
Or use an access list 200 to permit 0707 (07 ---> IP) only?

Please help me to clear my "congested" mind.

Thanks.

Best regards,

William

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