BRKARC-3438 from CiscoLive has a great architectural session detailing
the 3650/3850s. Pages 80-82 mention that there's a 6MB buffer compared
to a 2MB buffer on the 3750X.
In my previous job, I did start rolling out 3650s to several locations.
Other than the IOS XE image being significantly larger and taking longer
to download to switches at a remote site with a small circuit, we had 0
issues with them operationally. Configurations from older 3560 series
switches are 99% copy/paste (a few minor things that were mostly
cosmetic changes or differences in syntax like multicast routing
configuration, which is the same on 3650/3850 as it is on 4500E/X now).
One point to be aware of if you're coming from 3560X/3750X is that the
3850 continues to have the uplink modules, the 3650s went back to a
fixed configuration for the uplink ports, so you need to decide if you
want 1G or 10G uplinks when you purchase them. Pricing on the 3650s
were the same for a like-for-like 3560X. 3650s can also have a 4x10G
uplink, which makes them a lot more suitable for a small IDF aggregation
switch than the 3560X's which only had 2 10G ports available.
Jeremy Bresley
b...@brezworks.com
(I work for Cisco, but this is information I got from a public
presentation, and I'm in no way speaking for my employer.)
On 2/5/16 14:01, John Gaffney wrote:
We do have a few of those out the in field and they are solid switches. Not a
bad thought. Looking at the buffer size table looks like its much fatter than
the 2960..
The 3850 and 3650 seem like OK middle ground. Anybody deploy those? They decent?
Thanks,
John
-----Original Message-----
From: Mack McBride [mailto:mack.mcbr...@viawest.com]
Sent: Friday, February 5, 2016 1:37 PM
To: John Gaffney <jgaff...@nan.com>; Nick Cutting <ncutt...@edgetg.co.uk>; Tom Hill
<t...@ninjabadger.net>
Cc: cisco-nsp@puck.nether.net
Subject: RE: [c-nsp] Output drops on 2960
4948Es are pretty good if you need 10/100/1000.
They are also relatively cheap and can be bought used at a good discount.
If you don't need 10/100 then the Nexus 9300 series has a shared 50Mbyte buffer.
But they are relatively pricey and new so used is not really available.
Mack McBride | Senior Network Architect | ViaWest, Inc.
O: 720.891.2502 | C: 303.720.2711 | mack.mcbr...@viawest.com | www.viawest.com
-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of John
Gaffney
Sent: Friday, February 05, 2016 10:46 AM
To: Nick Cutting; Tom Hill
Cc: cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] Output drops on 2960
This looks like a great guide.
Looks like I'll be working to replace the switch with something with more
power. Any body have a recommendation for a switch with some bigger buffers and
2x 10G uplinks? Need at least 12 Gig ports.
Thanks,
John
-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Nick
Cutting
Sent: Friday, February 5, 2016 11:00 AM
To: Tom Hill <t...@ninjabadger.net>
Cc: cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] Output drops on 2960
I use this list for switch buffers - seems pretty accurate to me:
http://people.ucsc.edu/~warner/buffer.html
-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Tom Hill
Sent: 05 February 2016 15:54
Cc: cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] Output drops on 2960
On 05/02/16 15:45, Nikolay Shopik wrote:
Though, I've not seen anything mentioned in regards to the newer 3650/3850.
These have double amount of shared memory compare to what 2960S/3560X
have
Good to know!
--
Tom
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