From: Scott Morris (smorris@ipexpert.com)
Date: Mon Mar 26 2007 - 08:36:37 ART
Heheheh... With any requirement, we can always find ways to go "too far" in
our configuration. I think that's part of the paranoia of the CCIE lab.
Keep it simple. Meet a minimal requirement, as long as all things are
covered, then it's good. They are a bit more generalized, then EVERY
worst-case scenario. You do not need to make routing in your pod resilient
in the event that a meteor strikes part of your network. :)
But clarifying things is always good. When I have taken labs, I asked lots
and lots of questions. There's a chance I have to ask lots of questions
because I'm not as bright as some people... But I think I have a decent
success ratio at passing, so I'd prefer to think there's a different angle
in that! :)
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: Li Guoyi [mailto:Guoyi.Li@scs.com.sg]
Sent: Monday, March 26, 2007 12:56 AM
To: smorris@ipexpert.com; Narbik Kocharians; achievewoo@gmail.com
Cc: ccielab@groupstudy.com
Subject: RE: BGP issue
Thanks Scott,
You give me a better idea to approach this vague issue. One more question,
let us say "resiliency" is not mentioned in the redistribution question, but
it is mentioned in the beginning of IGP section. Do I need to consider all
the worse case scenarios, like what if this link fails, and what if that
link fails, etc? If I do so, I will make it very difficult. How resilient is
resilent enough? Or still I need to clarify with proctor?
Thanks,
-----Original Message-----
From: Scott Morris [mailto:smorris@ipexpert.com]
Sent: Monday, March 26, 2007 12:45 PM
To: Li Guoyi; smorris@ipexpert.com; 'Narbik Kocharians';
achievewoo@gmail.com
Cc: ccielab@groupstudy.com
Subject: RE: BGP issue
When it comes to redistribution, things are not always clear.
So the question becomes, how much redistribution to you need to do in order
to assure full reachability (if that is the goal)?
Different labs do it differently. Often due to the lab author's whim, or
what the lab is asking for. I know that doesn't always give much help
there, but if doing mutual redistribution on a single router works just fine
and doesn't cause problems (and the lab isn't asking for
resiliency) then you should be ok.
If the lab is asking for more, perhaps not.
The proctor should be there for clarification purposes, but it boils down to
asking the question properly! If you ask a vague question about "should
this be in two places", I would expect a vague answer. If you phrase things
more like you know what you can do, and are capable of doing whatever the
answer is, that may give the proctor a better chance to answer you without
feeling like they are giving away an answer.
"I have seen this done with mutual redistribution on multiple routers, but
the way I am reading this leads me to believe I can do it on just one
router. Is there any preference that you have on this, or am I missing
something in trying to understand the requirements here?"
Try to keep things as simple as possible, yet highlighting the idea that you
can perform whatever task it is.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Li
Guoyi
Sent: Monday, March 26, 2007 12:35 AM
To: smorris@ipexpert.com; Narbik Kocharians; achievewoo@gmail.com
Cc: ccielab@groupstudy.com
Subject: RE: BGP issue
Hi Scott,
Sometimes the requirement is not so explicit. For example, there are two
border routers between ospf and eigrp. The lab requires the reachability of
eigrp from ospf. In this case, if I do mutual redistribtion at one border
routers, it fulfills the requirement. Normally all the workbooks do mutual
redistribution at both border routers and play with tag/distance. It makes
redistribution a bit complicated. Since I lost points in IGP, I am not sure
I did it correctly by doing mutual redistribution at one border router only.
Can you please enlighten me?
If I clarify this with proctor, will I get answer or just be asked to read
the question? I am confused by the lab requirement sometimes.
Thanks,
-----Original Message-----
From: Scott Morris [mailto:smorris@ipexpert.com]
Sent: Monday, March 26, 2007 11:40 AM
To: Li Guoyi; 'Narbik Kocharians'; achievewoo@gmail.com
Cc: ccielab@groupstudy.com
Subject: RE: BGP issue
I think that the lab exam would be fairly explicit about what things you
were required to or not to be able to ping.
Just remember that routing works both directions! So not only do you need
to see a route to get there, but you need to advertise a route so that the
BB device can get back as well!
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Li
Guoyi
Sent: Sunday, March 25, 2007 11:26 PM
To: Narbik Kocharians; achievewoo@gmail.com
Cc: ccielab@groupstudy.com
Subject: RE: BGP issue
Hi Narbik,
How about those IGP routes from backbone devices? Is it required to ping
them?
Another one confused me is the links to backbone devices. Sometimes, they
are not in any IGP. In such case, do I need to do "redistribute connected"?
Thanks!
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Narbik Kocharians
Sent: Sunday, March 25, 2007 10:28 AM
To: achievewoo@gmail.com
Cc: ccielab@groupstudy.com
Subject: Re: BGP issue
NOT unless you were asked to do so, think that you are in the court, you
want to answer the question/s without providing more info, or less info.
On 3/24/07, achievewoo@gmail.com <achievewoo@gmail.com> wrote:
>
> Hi,group
> In real lab exam, do I have to make every bgp route reachable or
> pingable?
> Assume backbone routers did not join IGP, should I redistibute BGP
> route to IGP to make sure the full connection in POD network?
> What will proctor say ?
> Any suggestion will be apreciated!
> Thanks!
>
> ______________________________________________________________________
> _ Subscription information may be found at:
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>
-- Narbik Kocharians CCIE# 12410 (R&S, SP, Security) CCSI# 30832 Network Learning, Inc. (CCIE class Instructor) www.ccbootcamp.com (CCIE Training)
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