From: Paul Cosgrove (paul.cosgrove@heanet.ie)
Date: Sat May 24 2008 - 17:09:46 ART
I'm not very knowledgeable about the architectures, but it sounds to me
like 3750/3750Es with 32/65 Gbps stackwise connections actually compare
favourably with the 24Gbps available to individual 4500E modules.
My understanding is that the 4500 line cards do not perform buffering or
local switching, which makes high speed connectivity to the SUP
particularly important for them.
Since the 3750/3750Es do perform local switching, and have faster
inter-connections (albeit shared) than the max of 24Gbps available to
4500 linecards, I would have expected them to give better switching
performance where the majority of traffic flows are in and out of the
same individual switches/linecards. Would have thought they also win
out even when most traffic flows between switches/linecards provided the
number of switches/linecards is small.
As already mentioned, the 3750/3750Es also provide a certain level of
resilience, since the failure of one switch does not prevent the others
functioning. Smaller 4500s cannot use multiple SUPs, so this could be a
significant benefit of 3750/3750Es in some setups.
A large chassis 4500 may be able to switch faster between linecards,
each being able to send 24Gbps, so for some installations there are
benefits, but for smaller installations I don't see it.
Paul.
Jonathan Greenwood II wrote:
> Not only that the X46 line cards are now processing at 24Gbps vs 6Gbps with
> the X45 line cards. Thats with the 4500-E and Sup6.
>
> On Sat, May 24, 2008 at 9:48 AM, Jonathan Greenwood II <gwood83@gmail.com>
> wrote:
>
>
>> Not only that the X46 line cards are now processing at 24Gbps vs 6Gbps with
>> the X45 line cards. Thats with the 4500-E and Sup6.
>>
>>
>> On Sat, May 24, 2008 at 7:39 AM, Bill Eyer <beyer@optonline.net> wrote:
>>
>>
>>> Taj,
>>>
>>> The backplane of a 4500 is far faster than a stack of 3750 switches, so if
>>> you have high performance video or other data requirements the 4500 is a
>>> better solution. The drawback is cost.
>>>
>>> Bill
>>>
>>>
>>> Tajamal Shah wrote:
>>>
>>>
>>>> Chaps, need your help, I can't decide.....
>>>>
>>>> Is there any advantage in using 4500 switch over stack of 3750 switches
>>>> at
>>>> the core of a network?
>>>>
>>>> appreciate your input.
>>>>
>>>> Thanks
>>>>
>>>> Tajamal
>>>> -----Original Message-----
>>>> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>>>> Salau, Yemi
>>>> Sent: 20 May 2008 11:38
>>>> To: Joseph Brunner; theKonqueror; Cisco certification
>>>> Subject: RE: CCIE# 20863
>>>>
>>>>
>>>> Unbelievable for me, from CCNA to CCIE in 9months! That's really
>>>> impressive/awesome. (I assume you're referring to Sept. 2007)
>>>>
>>>> Well done mate, and keep up the good works. Yea, I reckoned with Joseph,
>>>> ditch the CCNA, but RHCE still rocks in Linux world though....can't
>>>> think of any greater cert in that line, LPI or Linux+? No chance ...
>>>> keep RHCE, then ofcourse keep CCIE.
>>>>
>>>> Enjoy!
>>>>
>>>> Many Thanks
>>>> Yemi Salau
>>>>
>>>> -----Original Message-----
>>>> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>>>> Joseph Brunner
>>>> Sent: Tuesday, May 20, 2008 11:24 AM
>>>> To: 'theKonqueror'; 'Cisco certification'
>>>> Subject: RE: CCIE# 20863
>>>>
>>>> Nice...
>>>> Drop the two other lame certs from your title, Anakin!
>>>>
>>>> -----Original Message-----
>>>> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>>>> theKonqueror
>>>> Sent: Tuesday, May 20, 2008 5:17 AM
>>>> To: Cisco certification
>>>> Subject: CCIE# 20863
>>>>
>>>> Hi everyone,
>>>>
>>>> In my second attempt at Bangalore yesterday, I passed R&S lab. I'd like
>>>> to
>>>> thank my best gal Swapnita, Brians from IE, Scott Morris, and all the
>>>> great
>>>> people at groupstudy for their support.
>>>>
>>>> I started my journey back in September when some of my work involved
>>>> routing
>>>> for SaaS applications, and I enrolled myself in a CCNA class. As the
>>>> instructors answered most of my questions with "It's not part of the
>>>> CCNA
>>>> exam", I decided to go for CCIE. This was the first time I ever touched
>>>> a
>>>> Cisco router. I passed the written exam in November and after that, used
>>>> dynamips for most of the lab preparation.
>>>>
>>>> I came so close to passing in my first attempt, but got a lousy 78%
>>>> instead
>>>> of a CCIE number. After coming back home, I scheduled another lab after
>>>> 30
>>>> days and worked on my weaknesses. I finished my lab yesterday 30 minutes
>>>> after the lunch and had 4 hours to verify everything. Got my result in 4
>>>> hours after leaving the lab.
>>>>
>>>> For all lab candicates, I'd like to add a note, IE mock labs and CCIE
>>>> Assesor are priceless. Go for them before going to real lab. Also, there
>>>> is
>>>> no substitute to real knowledge in the lab. You need to know your stuff
>>>> well
>>>> or else it's just $1400 lunch. And it isn't that great anyways ;)
>>>>
>>>> Time for me to get back to SaaS and Unix. Maybe in a few months I can
>>>> party
>>>> when I'm old enough to drink :P
>>>>
>>>>
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>
>
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