On Fri, 2013-09-20 at 19:56 +0300, Martin T wrote:
I have three WS-C2960G-24TC-L switches which all have about ten
servers connected. Each switch has a single 1GigE uplink. Those 1GigE
uplink ports on all switches experience occasional OutDiscards.
...
Looks like the only way to modify port
On (2013-09-20 20:11 +0200), Gert Doering wrote:
If you don't need QoS, turning it *off* with no mls qos will help
somewhat (as then all buffers are available for your packets, not only
1/4 which is allocated to that particular queue). What we had to
This common wisdom actually isn't true,
On 09/21/2013 01:40 AM, Blake Dunlap wrote:
Making the linux box slower in the ways described (other than packet
pacing) would just increase the cpu load. If those are feeder servers,
you're much better off dropping the link speed to 100m or configuring TC
outbound than turning off a lot of the
Hi,
On Fri, Sep 20, 2013 at 07:40:50PM -0500, Blake Dunlap wrote:
Or alternately, not trying to connect 10 servers at 1g to a budget access
layer switch with a single 1g uplink. If you don't want oversubscription,
don't oversubscribe
Calling any Cisco gear (besides the SME stuff) bugdget
On 09/21/2013 12:08 PM, Phil Mayers wrote:
On 09/21/2013 01:40 AM, Blake Dunlap wrote:
Making the linux box slower in the ways described (other than packet
pacing) would just increase the cpu load. If those are feeder servers,
you're much better off dropping the link speed to 100m or
Hi,
I have three WS-C2960G-24TC-L switches which all have about ten
servers connected. Each switch has a single 1GigE uplink. Those 1GigE
uplink ports on all switches experience occasional OutDiscards. I
would like to increase the outgoing buffer on uplink ports in order to
mitigate the egress
On 20/09/2013 17:56, Martin T wrote:
Hi,
I have three WS-C2960G-24TC-L switches which all have about ten
servers connected. Each switch has a single 1GigE uplink. Those 1GigE
uplink ports on all switches experience occasional OutDiscards.
As per Gert's reply - this is a platform feature. Even
Hi,
On Fri, Sep 20, 2013 at 07:56:26PM +0300, Martin T wrote:
I have three WS-C2960G-24TC-L switches which all have about ten
[..]
Any suggestions other than reduce the traffic on switch uplink ports?
Get some real switches...
Not exactly constructive, sorry. Been there, felt the pain,
Basically, you're using the wrong switch if you say the word server. That
being said, you can search the archives for the proper configuration to
oversubscribe the shared buffers.
-Blake
On Fri, Sep 20, 2013 at 1:11 PM, Gert Doering g...@greenie.muc.de wrote:
Hi,
On Fri, Sep 20, 2013 at
Hi,
On Fri, Sep 20, 2013 at 07:23:17PM +0100, Phil Mayers wrote:
(However: I wonder if the various techniques being discussed elsewhere -
like the new Linux kernel packet pacing, disabling TCP segmentation
offload and reducing nic ring, kernel and app buffers - might alleviate
the
On Fri, Sep 20, 2013 at 07:23:17PM +0100, Phil Mayers wrote:
(However: I wonder if the various techniques being discussed
elsewhere - like the new Linux kernel packet pacing, disabling TCP
segmentation offload and reducing nic ring, kernel and app buffers -
might alleviate the generation of
Making the linux box slower in the ways described (other than packet
pacing) would just increase the cpu load. If those are feeder servers,
you're much better off dropping the link speed to 100m or configuring TC
outbound than turning off a lot of the cpu offloading.
Or alternately, not trying to
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