From: huan@huanlan.com
Date: Tue Dec 09 2008 - 21:52:51 ARST
Hi Darby,
I guess we are discussing lab strategies, rather than the understanding of
technology. My point is that having extra broadcast keyword is different from
having extra redundant broadcast packets. The later are more often the
requirements in many workbook labs I practiced, and not the former!
BTW, for my very recent attempt, I did not know how many points I lost, but I
did not lose for more than 20 points in total for sure.
Huan
--- On Wed, 12/10/08, Darby Weaver <ccie.weaver@gmail.com> wrote:
From: Darby Weaver <ccie.weaver@gmail.com>
Subject: Re: Broadcast keyword in FR Hub & Spok
To: huan@huanlan.com
Cc: "Narbik Kocharians" <narbikk@gmail.com>, "CCIE Lab"
<ccielab@groupstudy.com>
Date: Wednesday, December 10, 2008, 10:22 AM
Yep... That's what I kept saying... to myself.
Doesn't work like that.
Consider this if you use the <br> keyword because you didn't take the time to
be the expert with Frame, and that's the only truth there is to the matter.
Convenience will not buy you points. Um... Trust me. I promise.
Then...
What happens later? Are other requirements using broadcast or unicast? Why?
Why not? Are you sure?
How many point did you really lose? 2, 3, 10, 20?
Hey it's your $1400.00 lunch, enjoy it any way you want.
Better not to go in the lab and expect that it is going to be with or without
the <br> keyword.
Some will call this an asumption on your part.
Proctors may take this as an assumption this type of candidate needs more time
to clear up these assumptions before winning the digits.
On Tue, Dec 9, 2008 at 5:50 PM, <huan@huanlan.com> wrote:
Hi Narbik,
My reasons for adding "broadcast", unless the requirement states
otherwise are:
- convenient,
- error prone,
- time-saving.
This are particularly important as far as CCIE lab is concerned.
When configuring WAN FR PVC, I would NOT have to pay much attention to the
requirements of the routing, and multicast, or even some miscenlinous topic
such as NTP which use broadcast or multicast.
I always configure "bp", as alias for "ping 255.255.255.255 timeout 1 repeat
1". When configuring L2 (Switching, FR, or P2P Serial), I only need to issue
"bp" and count responses, to see if I have full reachibility, instead of
having to type actual IP addresses.
This approach worked perfect for me!
Regards,
Huan
--- On Wed, 12/10/08, Narbik Kocharians <narbikk@gmail.com> wrote:
If your OSPF network is non-broadcast type, then your routing protocol will
send hello and update via unicast, and will simply not send updates via
broadcast. It will operate the same way as if you configure the map without
the keyword broadcast. Having that broadcast keyword does not force the
router to generate rudundant broadcast! Nothing different!
Then why use it????????????????????
Blogs and organic groups at http://www.ccie.net
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