From: Packet Man (ccie2b@hotmail.com)
Date: Wed Feb 18 2004 - 12:08:01 GMT-3
Yes. Personally, I think anyone who intends and hopes to pass the ccie lab
should read this book 2 or 3 times. (You can skip a couple of chapters that
aren't very relevant to the exam material) In terms of quality,
readability, comprehensiveness, this book is about as good as it gets. It
should be right up there with both Doyle books, Halabi's book and one or two
others.
>From: Nathasha Aleyevka <naleyevka@yahoo.com>
>Reply-To: Nathasha Aleyevka <naleyevka@yahoo.com>
>To: Packet Man <ccie2b@hotmail.com>, blackyeyes00@hotmail.com,
>ccielab@groupstudy.com
>Subject: RE: Limiting ICMP using CAR
>Date: Wed, 18 Feb 2004 06:35:20 -0800 (PST)
>
>Cisco DQOS Exam Certification Guide
> ISBN:1587200589
>
>By Wendell Odom, Michael Cavanaugh
>
>Packet Man-Is this the book you mentioned?
>Thank you
>Packet Man <ccie2b@hotmail.com> wrote:
>yasser,
>
>You are correct. I also found some other things which I had forgotten. (My
>brain is a leaking bucket).
>
>Keep tihs in mind.
>
>Tc doesn't always = 1/8 second. Tc= Bc/cir and remember (unlike I did)
>that Bc is in Bytes and cir is in bits.
>
>Also, and this is again counter intuitive. The 3rd parameter isn't really
>Be, it's Be + Bc. So, if Bc and Be look like they're the same (for example,
>the parameters are 128000 4000 4000), what that really means is that Be =
>0.
>So, using those same parameters, Tc = 4000 / 16000 = 1/4 second
>
>Get the book DQOS. He has the best explanations and examples of this stuff.
>
>HTH
>
>
> >From: "Yasser Aly"
> >To: ccie2b@hotmail.com, ccielab@groupstudy.com
> >Subject: RE: Limiting ICMP using CAR
> >Date: Tue, 17 Feb 2004 19:15:13 -0500
> >
> >
> >Hi Packet Man,
> >
> > Bc and Be are configured in Bytes not bits. I am not sure about whether
> >it is per Tc or not.
> >
> >Needs clarification.
> >
> >Regards,
> >Yasser
> >
> >>From: "Packet Man"
> >>To: blackyeyes00@hotmail.com, ccielab@groupstudy.com
> >>Subject: RE: Limiting ICMP using CAR
> >>Date: Tue, 17 Feb 2004 18:27:11 -0500
> >>
> >>Yasser,
> >>
> >>I think the issue you might be having is due to the different units used
> >>for the different parameters. Remember that the 1st parameter, cir, is
>in
> >>bits per SECONDS while the Bc and Be are in bits per Tc which is 1/8 of
>a
> >>second.
> >>
> >>So, 128,000 kbps dvided by 8 = 16,000 = bits per interval, Tc. To allow
> >>for a burst of 1/4 of this rate, divide by 4. 16,000 / 4 = 4000.
> >>
> >>Now, given the requirements you stated, I think the answer that was
> >>provided is wrong. I think it should be
> >> CIR Bc Be
> >>rate-limit output access-group 100 128000 16000 4000 conform-action
> >>transmit exceed-action drop
> >>
> >>Hopefully, if I'm mistaken, someone will immediately say so and point
>out
> >>my mistake. (It wouldn't be the 1st time)
> >>
> >>HTH
> >>
> >>
> >>>From: "Yasser Aly"
> >>>Reply-To: "Yasser Aly"
> >>>To: ccielab@groupstudy.com
> >>>Subject: Limiting ICMP using CAR
> >>>Date: Tue, 17 Feb 2004 18:07:34 -0500
> >>>
> >>>Hi group,
> >>>
> >>> The task is as follows: Configure E0/0 such that ICMP traffic is
> >>>limited to 128Kbps.
> >>>Allow for a burst of 1/4th of this rate.
> >>>
> >>>
> >>>The answer for this question was as follows:
> >>>
> >>>acess-group 101 permit icmp any any
> >>>!
> >>>interface Ethernet0/0
> >>>rate-limit output access-group 100 128000 4000 4000 conform-action
> >>>transmit exceed-action drop
> >>>
> >>>I am confused why Bc and Be were set this way. Would you kindly explain
> >>>and give more detail on general concepts used when configuring Bc and
>Be
> >>>while using CAR.
> >>>
> >>>Regards,
> >>>Yasser
> >>>
> >>>_________________________________________________________________
> >>>The new MSN 8: smart spam protection and 2 months FREE*
> >>>http://join.msn.com/?page=features/junkmail
> >>>http://join.msn.com/?page=dept/bcomm&pgmarket=en-ca&RU=http%3a%2f%2fjoin.msn.com%2f%3fpage%3dmisc%2fspecialoffers%26pgmarket%3den-ca
> >>>
> >>>_______________________________________________________________________
> >>>Please help support GroupStudy by purchasing your study materials from:
> >>>http://shop.groupstudy.com
> >>>
> >>>Subscription information may be found at:
> >>>http://www.groupstudy.com/list/CCIELab.html
> >>
> >
>
>_________________________________________________________________
>Say good-bye to spam, viruses and pop-ups with MSN Premium -- free trial
>offer! http://click.atdmt.com/AVE/go/onm00200359ave/direct/01/
>
>_______________________________________________________________________
>Please help support GroupStudy by purchasing your study materials from:
>http://shop.groupstudy.com
>
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
>
>---------------------------------
>Do you Yahoo!?
>Yahoo! Mail SpamGuard - Read only the mail you want.
>
>_______________________________________________________________________
>Please help support GroupStudy by purchasing your study materials from:
>http://shop.groupstudy.com
>
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Fri Mar 05 2004 - 07:13:51 GMT-3