RE: 3750s vs 3550s

From: amilabs (amilabs@optonline.net)
Date: Mon Feb 21 2005 - 19:55:12 GMT-3


David according to some research I am doing for a QoS project. The 3550 and
3750 are "just about" the same with QoS options except some idiosyncrasies.
Like the priority queue is number 4 on the 3550 and 1 on the 3750 or the
other way around(I forgot) the one thing I found on the 3550 is that you can
specify in the policy map the bandwidth command for bits or percentage.
Which is very important. However, the 3750 does not have that. I checked on
a unit with the latest version loaded. I email tac about this for my current
project entail enabling QoS on a major enterprise and the access layer
switches are all 3750(the client's new standard). The older 3550s have the
feature I would love to use and the newer ones don't have it. Most of the
other MQC are the same and operate the same but be weary.

Regards..

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
David Duncon
Sent: Monday, February 21, 2005 5:30 PM
To: ccielab@groupstudy.com
Subject: 3750s vs 3550s

Hi Group ,

I got few Qs regarding new L3 switching kid in the block ," 3750".

1) What are the limitations or advantages of this switch when compared to
3550 ?
2) Can these guys do all MQC such as shaping , queuing and policing ?
3) Do they support cRTP ?
4) When I was pushing 3550s couple of months ago , I have realized that we
3550s do have some TCAM issues if push the number of vlans more than 30 odd
in the campus network. And also I realized 3550s can not do advanced PBR as
well. I am wondering do 3750s do have same limitations.

Your feed back is much appreciated.

Cheers

- David.



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