From: ccie2be (ccie2be@nyc.rr.com)
Date: Sat Aug 16 2003 - 09:51:38 GMT-3
Hi,
According to Cisco's documentation:
Questions to ask the Telco
When configuring and troubleshooting multilink, ask the CALLED router's telco
the following questions:
1.. Question: Do we need to dial one number or two numbers to connect to
both remote B-channels?
Answer:
One number: Configure a single dialer string or dialer map on the local
router's physical or dialer interface as appropriate. Refer to Step 4 below
for more information. Proceed to Question 2
Two numbers: On the local router, configure a dialer map or dialer string
for each remote B-channel ISDN number. Refer to Step 4 below for more
information.
2.. Question: Are both B-channel numbers configured in a Hunt-Group?
Answer:
Yes: This is the expected setting for circuits that only need one number to
connect to both B-channels. The Hunt-group binds both B-channel numbers (thus
the CALLING side needs only one number to call). After the first B-channel is
connected, the CALLING router will again dial the same number. The switch at
the remote end, closest to the CALLED router recognizes that the first
B-channel is busy and transfers the call onto the second B-channel thus making
bundling possible.
No: Ask the Telco to configure both B-channels numbers in a Hunt-group and
automatically roll over a call to the second number when the first is busy. If
the telco does not configure the hunt-group, then configure the dialer redial
or isdn fast-rollver delay command as explained in Step 5 of the Step-by-step
Troubleshooting Procedure below.
My question: In the lab exam, to find out the answers to the above questions,
do we need to ask the proctor or are there show commands we can use to find
out these answers? And, if show commands which ones and what do we look for
in the output?
Thanks, dt
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