what kind of question is this!?

From: James (james@towardex.com)
Date: Fri Aug 13 2004 - 16:08:06 GMT-3

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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