From: Joseph D. Phillips (josephdphillips@fastmail.us)
Date: Fri Aug 13 2004 - 16:17:31 GMT-3
I am fairly sure this is alluding to dialer watch.
Dialer watch does not require a dialer list or definition of interesting
traffic to bring up the circuit.
In this instance the existence of the dialer list you mention is extraneous.
If you don't define a dialer list, traffic won't bring up the link by
default.
Unless you use dialer watch.
----- Original Message -----
From: "James" <james@towardex.com>
To: <ccielab@groupstudy.com>
Sent: Friday, August 13, 2004 12:08
Subject: what kind of question is this!?
> Hi group,
>
> Okay so I am reading this CCIE R&S Practice Labs book. On the very first
lab,
> look at the ISDN, the question clearly asks of me:
>
> "Ensure that VLAN3 and R4 Lo0 are accessible from R1 and beyond should
> the frame network fail either physically or logically. If VLAN3 and R4 Lo0
> networks are restored while the ISDN line is active, ensure that traffic
is
> routed over frame relay network to these destinations immediately."
>
> The question does not specifically mention that ISDN line should come up
if and
> only if R4/VL3 routes via frame network are down. Now looking at the
solutions
> debriefing, they talk about placing "dialer-list 10 proto ip deny" so that
> ISDN never comes online during normal operations. Why? Why does this need
to
> happen when question never asked for making sure ISDN circuit remains down
> during normal frame-relay operation? All I have to do is make sure ISDN is
used
> to transit VLAN3 + R4 Lo0 when routes via frame is down, no? I'm confused
with
> this whole Cisco-landmine trickery language :)
>
> Thanks!
> -J
>
> --
> James Jun TowardEX
Technologies, Inc.
> Technical Lead Network Design, Consulting, IT
Outsourcing
> james@towardex.com Boston-based Colocation & Bandwidth
Services
> cell: 1(978)-394-2867 web: http://www.towardex.com , noc:
www.twdx.net
>
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