[c-nsp] 2960 -> 4948 - no more drops :)

CiscoNSP_list CiscoNSP_list cisconsp_list at hotmail.com
Sat Feb 16 19:08:20 EST 2013

Thanks Dan - Our 2960 was doing a mix of Inet+VRF+backup traffic...so quite bursty.

Really impressed with the difference between the 2960 + 4948...as you have said...night and day.

Im really interested to find out if it's purely buffer size (And the way it's allocated), or if there is a significant architectural difference between the 2960/3560/3750 and 4948's....to go from 40,000+ drops to zero (5min) is a significant improvement :) 

Date: Sat, 16 Feb 2013 17:45:53 -0600
Subject: Re: [c-nsp] 2960 -> 4948 - no more drops :)
From: danletkeman at gmail.com
To: cisconsp_list at hotmail.com
CC: cisco-nsp at puck.nether.net

Same here.  We went from 3560G's to 4948's and it was night and day.  Zero output drops now and a noticeable performance improvement, as we were using these switches for ISCSI traffic.  No qos tuning or disabling helped our situation on the 3560G's.

What type of traffic were you sending through the 2960G?

On Sat, Feb 16, 2013 at 5:15 PM, CiscoNSP_list CiscoNSP_list <cisconsp_list at hotmail.com> wrote:

Hi Guys,

We recently upgraded a 2960G(Only doing L2) that was hitting ~500Mb/sec on one port, and we were seeing 40,000+ output drops (5Min) - Since the swap to the 4948, we see zero output drops. Is the difference in performance purely buffer size?  I *think* the 2960 has 1.9Mb (Per ASIC) and the 4948 has 16Mb (total?)?



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