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Switch testing

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Switch testing
posted by Brian Krusic on March 25, 2015, 1:55 p.m.
Hi,

I suggest doing netperf as well.

I recently used these to debug my 40Gb network, special thanks to Richard Hastie@Mellanox BTW,

Iperf
 
for max BW i typically use :

Server:

iperf -s -l64k

Client

iperf - c<ip of server> -l64k -P2

 
Netperf
 
 
Server: netserver 

Client: netperf H <server IP addr> t TCP_RR 

The result is transactions per second (TPR). 

Latency is calculated as: Latency=(1/TPR)/2
 
 
netperf -H 11.10.10.12 -t TCP_STREAM -I 99,5 -T 2,2
 
 
 
Another few examples
 
netperf H <server-ip> -t TCP_STREAM I 99,5 T 2,2 
netperf H <server-ip> -t TCP_STREAM I 99,5 T 2,2 -- -m 2048 
netperf H <server-ip> -t TCP_STREAM I 99,5 T 2,2 -- -m 1024 
netperf H <server-ip> -t TCP_STREAM I 99,5 T 2,2 -- -m 500 
netperf H <server-ip> -t TCP_RR I 99,5 T 2,2 -- -m 1024 

netperf H <server-ip> -t UDP_STREAM I 99,5 T 2,2 
netperf H <server-ip> -t UDP_STREAM I 99,5 T 2,2 -- -m 1024 
netperf H <server-ip> -t UDP_RR I 99,5 T 2,2 -- -m 150

Of course tweak your server/client cards as well and not just TCP fromage but IRQ affinity etc

- Brian

Technologist...
i.e., Purveyor of the ironic"

On Mar 25, 2015, at 10:31 AM, Jathavan Sriram <sriram@harvest-postproduction.com> wrote:

Hi everyone,
we are currently testing 10GigE cut-through switches (Arista, Force10/Dell, IBM, Brocade). What are you guys using to
test overall bandwidth, congestion, switch buffers and latency? Iperf and running tons of file transfers (what we do right now) does not feel like
a best practice approach. There is a company called ixia which builds various testing devices (http://www.ixiacom.com/routing-switching) but I can't
find anything open source or free on a Linux basis to do this.

Cheers
jatha


--
///////////////////////////
///////////////////////////
////////////////////
JATHAVAN SRIRAM

HARVEST / 
DIGITAL AGRICULTURE GMBH

Alter Wandrahm 8-9
20457 Hamburg
Phone: +49/ 40 411 880 500
sriram@harvest-postproduction.com
www.harvest-postproduction.com


Managing Director: Florian Arlart
Trade register: Harvest Digital Agriculture GmbH, HRB 121482




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0 Responses   0 Plus One's   0 Comments  
 
Hi,

I suggest doing netperf as well.

I recently used these to debug my 40Gb network, special thanks to Richard Hastie@Mellanox BTW,

Iperf
 
for max BW i typically use :

Server:

iperf -s -l64k

Client

iperf - c<ip of server> -l64k -P2

 
Netperf
 
 
Server: netserver 

Client: netperf H <server IP addr> t TCP_RR 

The result is transactions per second (TPR). 

Latency is calculated as: Latency=(1/TPR)/2
 
 
netperf -H 11.10.10.12 -t TCP_STREAM -I 99,5 -T 2,2
 
 
 
Another few examples
 
netperf H <server-ip> -t TCP_STREAM I 99,5 T 2,2 
netperf H <server-ip> -t TCP_STREAM I 99,5 T 2,2 -- -m 2048 
netperf H <server-ip> -t TCP_STREAM I 99,5 T 2,2 -- -m 1024 
netperf H <server-ip> -t TCP_STREAM I 99,5 T 2,2 -- -m 500 
netperf H <server-ip> -t TCP_RR I 99,5 T 2,2 -- -m 1024 

netperf H <server-ip> -t UDP_STREAM I 99,5 T 2,2 
netperf H <server-ip> -t UDP_STREAM I 99,5 T 2,2 -- -m 1024 
netperf H <server-ip> -t UDP_RR I 99,5 T 2,2 -- -m 150

Of course tweak your server/client cards as well and not just TCP fromage but IRQ affinity etc

- Brian

Technologist...
i.e., Purveyor of the ironic"

On Mar 25, 2015, at 10:31 AM, Jathavan Sriram <sriram@harvest-postproduction.com> wrote:

Hi everyone,
we are currently testing 10GigE cut-through switches (Arista, Force10/Dell, IBM, Brocade). What are you guys using to
test overall bandwidth, congestion, switch buffers and latency? Iperf and running tons of file transfers (what we do right now) does not feel like
a best practice approach. There is a company called ixia which builds various testing devices (http://www.ixiacom.com/routing-switching) but I can't
find anything open source or free on a Linux basis to do this.

Cheers
jatha


--
///////////////////////////
///////////////////////////
////////////////////
JATHAVAN SRIRAM

HARVEST / 
DIGITAL AGRICULTURE GMBH

Alter Wandrahm 8-9
20457 Hamburg
Phone: +49/ 40 411 880 500
sriram@harvest-postproduction.com
www.harvest-postproduction.com


Managing Director: Florian Arlart
Trade register: Harvest Digital Agriculture GmbH, HRB 121482




The contents of this email are confidential. If you are not the intended recipient, please notify us as soon as possible: you should not copy, forward, disclose or use the contents. Start may monitor outgoing and incoming mail for business purposes.
To unsubscribe from the list send a blank e-mail to mailto:studiosysadmins-discuss-request@studiosysadmins.com?subject=unsubscribe


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