From: Kenneth Wygand (KWygand@customonline.com)
Date: Thu Jul 15 2004 - 15:44:11 GMT-3
Thanks Scott,
I'm probably just subconsciously pulling straws to try to determine some logic for points I've lost in the past. More importantly, I just don't want to lose points next time!
I appreciate your opinion! Thanks!
Ken
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-----Original Message-----
From: Scott Morris <swm@emanon.com>
To: Kenneth Wygand <KWygand@customonline.com>; ccielab@groupstudy.com <ccielab@groupstudy.com>
Sent: Thu Jul 15 14:33:01 2004
Subject: RE: Suboptimal Routing?
If there is nothing on your lab discussing the concept of sub-optimal
routing, then I wouldn't worry about it at all... No harm, no foul...
If it mentions that, or gives other requirements for a preference or
direction certainly pay attention to it. But if it is not asked for, it
becomes your personal decision on what to do. But I wouldn't spend a lot of
time making your network look "pretty". There are no points for "pretty"
routing tables.
My opinion,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, CISSP,
JNCIP, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net
PS. Clearly avoid this habit in real-life. :)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Kenneth Wygand
Sent: Thursday, July 15, 2004 12:41 PM
To: Kenneth Wygand; ccielab@groupstudy.com
Subject: Re: Suboptimal Routing?
Surely someone has an opinion on this or can explain why this is (or should
be) done.
Thanks in advance,
Ken
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-----Original Message-----
From: nobody@groupstudy.com <nobody@groupstudy.com>
To: ccielab@groupstudy.com <ccielab@groupstudy.com>
Sent: Wed Jul 14 20:57:34 2004
Subject: Suboptimal Routing?
I have a generic question regarding suboptimal routing on the CCIE lab.
Suppose I have both RIP and OSPF running in my network. I have two routers
that are running both RIP and OSPF (on the RIP/OSPF border). One of these
routers is mutually redistributing RIP and OSPF (let's call this "Router
1"). Without changing distances or filtering, routes that originate in RIP
and are redistributed by "Router 1" into OSPF will be received by "Router 2"
in OSPF. So now Router 2 will know of routes from the RIP domain through
both it's own RIP routes and also through the OSPF routes. Of course, the
distance of OSPF is less than RIP, so it will default to choose the routes
that "go all the way around the world" to get back into the RIP domain.
This is a clear case of "suboptimal routing" but still provides full IP
connectivity. Every single practice lab I've ever come across has always
"treated" this situation by using some mechanism (filtering, distance, etc)
to cause the native RIP routes to be preferred through RIP as opposed to the
"all the way around the world" OSPF routes.
However, none of these labs ever say "ensure you avoid suboptimal routing".
I've also heard many times that the lab is "not testing real-world best
practices, only that you meet the requirements of the question". Well, if
the question states I must have IP reachability, then why should I bother
fixing suboptimal routing. Sure, it will display to the proctor that I
understand it and I know what I'm doing, but why -specifically- do I have to
do it to get points on my exam? If it doesn't say to avoid this, why should
I waste my time?
Thanks in advance, as I really look forward to your responses.
Ken
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