From: john matijevic (matijevi@bellsouth.net)
Date: Fri Aug 13 2004 - 18:00:23 GMT-3
Hi James,
"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."
This is basically saying that if the frame network fail than to use the
isdn line. Part of CCIE language 101, just kidding. Again this is solved
with dialer watch as Joseph suggested.
As far as the following:
"dialer-list 10 proto ip deny"
This is basically an implicit deny of any ip traffic. The book
recommends that it is better practice and show better understanding of
dialer watch process to put it in.
Just make sure you test this and see the dialer watch working, and
understand what is going on.
Sincerely,
John Matijevic, CCIE #13254, MCSE, CNE, CCEA
Network Consultant
Hablo Espanol
305-321-6232
http://home.bellsouth.net/p/PWP-CCIE
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
James
Sent: Friday, August 13, 2004 3:08 PM
To: ccielab@groupstudy.com
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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