Hi,
On Mon, Sep 20, 2010 at 02:41:12PM +, Mishka, Jason wrote:
I've seen similar problems when backups run at night. The drops happened on
a 4xGE etherchannel on the individual ports in the bundle. What I found was
that the hashing was being done very poorly and one of the interfaces
Hi all,
I am pretty sure the C3750/C3560 ranges of switches have 2 MB of buffer
space / ASIC.
How many ports are connected on an ASIC depends and differs in each model:
some models have 4 ports / ASIC, other
24 ports / ASIC :-)
The buffer space of 2 MB is divided in 4 queues which you can
Hi,
On Sun, Sep 12, 2010 at 07:13:33PM -0400, Keegan Holley wrote:
You can always buy more switches and move ports. The 2960 and the hundreds
of other switches (and blades) just like it is a wiring closet switch for
the enterprise. It should be common knowledge (no offense if this is new
expected to see more than two ASICs.
--Vincent
From: illcrit...@gmail.com [mailto:illcrit...@gmail.com] On Behalf Of
Ben Steele
Sent: Friday, September 10, 2010 2:06 PM
To: Vincent Aniello
Cc: Nick Hilliard; cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] ASIC to switch port mapping
On 13/09/2010 07:05, Gert Doering wrote:
ports, while the average egress load never exceeded 50% (!)
The average that you're talking about here is measured over 5 minutes,
which is an eternity in terms of packet throughput. If you drop your
measurement interval from 5 minutes to something
On 13/09/2010 10:44, Gert Doering wrote:
Nick, grant me a bit of understanding about averaging and bursts :-)
Heh, this wasn't directed at you, really. But most people don't bother
looking at numbers any closer than the 5 minute average - which tells you
almost nothing about what's going
Hi,
On Mon, Sep 13, 2010 at 11:06:48AM +0100, Nick Hilliard wrote:
On 13/09/2010 10:44, Gert Doering wrote:
(spreading out the packets), while most other streaming software creates
somewhat massive wirespeed bursts, and then waits some milliseconds, and
then generates a new wirespeed burst.
Interesting enough, yesterday James Ventre posted a note where he
found at least some minimal info about the 2960/3560/3750 buffer
amount:
http://networking.ventrefamily.com/2010/09/3560ge-and-3750ge-buffers.html
Also, I have to say I have exactly the same experience as Gert - IPTV
streaming box
On Mon, 13 Sep 2010, Pavel Skovajsa wrote:
Interesting enough, yesterday James Ventre posted a note where he
found at least some minimal info about the 2960/3560/3750 buffer
amount:
http://networking.ventrefamily.com/2010/09/3560ge-and-3750ge-buffers.html
Ugh, ugly. I was hoping to find a
: Håvard Staub Nyhus [mailto:hny...@gmail.com]
Sent: Friday, September 10, 2010 11:33 AM
To: Vincent Aniello
Cc: cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] ASIC to switch port mapping
I am trying to determine the switch ports assigned to each ASIC in
various Cisco switches, in particular
Seriously look at the juniper ex platforms if you are open to other
vendors. They sound to be exactly what your are asking for.
On Mon, 13 Sep 2010, Pavel Skovajsa wrote:
Interesting enough, yesterday James Ventre posted a note where he
found at least some minimal info about the
Ugh, ugly. I was hoping to find a box that could do 10Gb/s uplink and
breakout as far down as 100Mb/s. Back to hunting again.
Have a look at the new ME 3600X / 3800X series.
Steinar Haug, Nethelp consulting, sth...@nethelp.no
___
cisco-nsp mailing
The 4900 is 16MB shared for the whole box. The Arista 7048 (not stackable) is
about the only thing close to the S60, with 768MB.
Phil
On Sep 13, 2010, at 2:03 PM, Nick Hilliard wrote:
On 13/09/2010 17:28, Chris Evans wrote:
Seriously look at the juniper ex platforms if you are open to
Gert Doering g...@greenie.muc.de writes:
Now if I had more time :-) it might be worth investigating the (Linux)
streaming server software used, whether it can be changed to invest a bit
more CPU to better smooth out the packets... OTOH, the kernel might
just wreck this, and smear it all
Nick Hilliard n...@foobar.org writes:
From what I remember, the EX4200 has rather small buffers - not terribly
different in size to the 3560/3750 range. This is from memory, so I could
be mistaken. Juniper are rather coy on the topic, which is always a sign
of relative paucity. If the box
Hi,
On Mon, Sep 13, 2010 at 10:23:24PM +0200, Benny Amorsen wrote:
You can use pspacer to achieve something close to perfect smoothing of
bursty traffic.
Thanks for the link.
I'll give it a try - it's not perfectly what we want (because it needs
to know the target bitrate to shape to,
On 13/09/2010 21:33, Benny Amorsen wrote:
3MB per PFE, according to:
http://www.juniper.net/us/en/local/pdf/implementation-guides/8010073-en.pdf
http://kb.juniper.net/KB10963
so, the 24 port model has 2 PFEs (i.e. 6M buffer space) and the 48, 3 PFEs
(9 meg). That's not really very much,
Hi,
On Fri, Sep 10, 2010 at 01:18:19PM -0400, Vincent Aniello wrote:
I am trying to solve a output drops on switch ports on which bandwidth
utilization does not seem to exceed the port speed. Seems like the
drops are due to the buffers filling up and dropping frames. I am under
the
They are closet switches. If you need bigger buffers get a platform meant
for heavier use such as the 4948. There are other vendors with nice
offerings at a lower cost too so don't think Cisco is the only answer.
Hi,
On Fri, Sep 10, 2010 at 01:18:19PM -0400, Vincent Aniello wrote:
I am trying
(I assume the response was to this or similar)
On Sun, 2010-09-12 at 13:43 +0200, Gert Doering wrote:
Cisco does not think that this is a problem, and I have been told that
the new generation 2960S and 3560E have the same size buffers.
On Sun, 2010-09-12 at 08:26 -0400, Chris Evans wrote:
IMHO the 3750/3560 series are way overpriced and underperforming switches.
I'd honestly give the Juniper EX4200 series a look if you're looking for a
direct class comparison, but looking for better performance at a lower cost.
Our Cisco HTTS engineers have directly come out and said that they will
On 9/12/2010 1:05 PM, Peter Rathlev wrote:
Seriously: Is it okay for Cisco to sell handicapped closet switches?
It's not like they're cheap compared to others vendors or previous
comparable Cisco switches (3550/2950/2970)
We have held on to 2950/3550s for that very purpose, where their
Hi Jeff
On 12.09.2010, at 19:32, Jeff Kell jeff-k...@utc.edu wrote:
We have held on to 2950/3550s for that very purpose, where their newer
counterparts present excessive drops. Rather than being pushed toward
surplus,
It is particularly annoying on an EMI (L3) switch actually doing
Hi,
On Sun, Sep 12, 2010 at 08:41:49PM +0200, Andrew Miehs wrote:
2960s are especially prone to drops (esp if mls qos enabled).
Does this include 2960Gs?
Yes.
gert
--
USENET is *not* the non-clickable part of WWW!
You can always buy more switches and move ports. The 2960 and the hundreds
of other switches (and blades) just like it is a wiring closet switch for
the enterprise. It should be common knowledge (no offense if this is new
information to you) that they are oversubscribed, have tiny buffers and
This is a VERY interesting topic. We need to have more attention at buffers
size in our next aquisition. Thanks guy.
2010/9/12 Keegan Holley keegan.hol...@sungard.com
You can always buy more switches and move ports. The 2960 and the hundreds
of other switches (and blades) just like it is a
On Sunday, September 12, 2010 07:43:26 pm Gert Doering
wrote:
Cisco does not think that this is a problem, and I have
been told that the new generation 2960S and 3560E have
the same size buffers.
Probably because these are Enterprise switches, and
enterprise-anything shouldn't be trying to
I am trying to determine the switch ports assigned to each ASIC in
various Cisco switches, in particular a 3750 and 3560E. Can anyone
enlighten me on how to go about doing this?
Thanks.
--Vincent
Disclaimer: Any references to Pipeline performance contained herein are based
on
Hi Vincent
1) Obtain screwdriver
2) Remove case
3) Trace tracks... :)
On a serious note, it is actually probably the best way to do it. What are
you trying to achieve/solve/learn?
Heath
On 10 September 2010 15:13, Vincent Aniello
vincent.anie...@pipelinefinancial.com wrote:
I am trying to
On 10/09/2010 16:20, Heath Jones wrote:
On a serious note, it is actually probably the best way to do it.
+1
Nick
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https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at
I am trying to determine the switch ports assigned to each ASIC in
various Cisco switches, in particular a 3750 and 3560E. Can anyone
enlighten me on how to go about doing this?
show platform pm if-numbers
In the port column, look at the first number.
--
Håvard Staub Nyhus
+47 41 88 00 99
Staub Nyhus
Sent: Friday, September 10, 2010 10:33 AM
To: Vincent Aniello
Cc: cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] ASIC to switch port mapping
I am trying to determine the switch ports assigned to each ASIC in
various Cisco switches, in particular a 3750 and 3560E. Can anyone
On 10/09/2010 17:16, Murphy, William wrote:
Is there also a command for the 6500 that does this? It's of interest
to me because some features like VLAN translation work on groups of
ports on a common ASIC...
show interface Gi x/y capabilities | i ASIC
Nick
[mailto:hj1...@gmail.com]
Sent: Friday, September 10, 2010 11:20 AM
To: Vincent Aniello
Cc: cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] ASIC to switch port mapping
Hi Vincent
1) Obtain screwdriver
2) Remove case
3) Trace tracks... :)
On a serious note, it is actually probably the best way
, 2010 11:33 AM
To: Vincent Aniello
Cc: cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] ASIC to switch port mapping
I am trying to determine the switch ports assigned to each ASIC in
various Cisco switches, in particular a 3750 and 3560E. Can anyone
enlighten me on how to go about doing this?
show
This is on a 3650E switch.
Thanks.
--Vincent
-Original Message-
From: Nick Hilliard [mailto:n...@foobar.org]
Sent: Friday, September 10, 2010 1:31 PM
To: Vincent Aniello
Cc: Heath Jones; cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] ASIC to switch port mapping
On 10/09/2010 18:18
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 9/10/2010 12:16 PM, Murphy, William wrote:
Is there also a command for the 6500 that does this? It's of
interest to me because some features like VLAN translation work on
groups of ports on a common ASIC...
Check out
; cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] ASIC to switch port mapping
On 10/09/2010 18:18, Vincent Aniello wrote:
I am trying to solve a output drops on switch ports on which bandwidth
utilization does not seem to exceed the port speed. Seems like the
drops are due to the buffers
@puck.nether.net
Subject: Re: [c-nsp] ASIC to switch port mapping
sh platform port-asic should list your ASIC's
port groupings are almost always in groups, so you can work out what
ports belong to a common ASIC by dividing the amount of ports you have
by the amount of ASIC's listed, keep in mind
the
connections on the switch to better balance the load.
Thanks.
--Vincent
*From:* Heath Jones [mailto:hj1...@gmail.com]
*Sent:* Friday, September 10, 2010 11:20 AM
*To:* Vincent Aniello
*Cc:* cisco-nsp@puck.nether.net
*Subject:* Re: [c-nsp] ASIC to switch port mapping
Hi Vincent
1
On 10/09/2010 18:40, Vincent Aniello wrote:
Unless there is only a single ASIC in a 3560E switch I do not believe
this command returns the ASICs associated with each port. Here is the
output on my switch:
oh, 3650. hmmm.
Unfortunately, these switches have very small buffers indeed. If you
-boun...@puck.nether.net] On Behalf Of Nick Hilliard
Sent: Friday, September 10, 2010 4:11 PM
To: cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] ASIC to switch port mapping
On 10/09/2010 18:40, Vincent Aniello wrote:
Unless there is only a single ASIC in a 3560E switch I do not believe
...@puck.nether.net
[mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Nick Hilliard
Sent: Friday, September 10, 2010 4:11 PM
To: cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] ASIC to switch port mapping
On 10/09/2010 18:40, Vincent Aniello wrote:
Unless there is only a single ASIC in a 3560E
On 9/10/2010 5:47 PM, Vincent Aniello wrote:
Any recommendations on a switch with larger buffers? I would like to
stick with the 1U form factor.
Also, are you saying that the microbursts cause the switch to exceed 1Gb
port speed which causes the drops? Cisco claims that the
On 10/09/2010 22:47, Vincent Aniello wrote:
Any recommendations on a switch with larger buffers? I would like to
stick with the 1U form factor.
Also, are you saying that the microbursts cause the switch to exceed 1Gb
port speed which causes the drops? Cisco claims that the
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