Re: Maximum traffic on Gigabit Ethernet

Cisco devices are known for having the lowest throughput of "gig" interfaces with the shallowest, highest latency fabrics in the industry. So while cisco's software is great and easy to learn and everyone knows it - those seeking high performance use juniper, blade and arista.

Joe

From: Muhammad Ahmed [mailto:faisal3541_at_hotmail.com]
Sent: Monday, October 03, 2011 11:23 AM
To: Joseph L. Brunner; manafo_at_hotmail.com <manafo_at_hotmail.com>; ccielab_at_groupstudy.com <ccielab_at_groupstudy.com>; cisco-nsp_at_puck.nether.net <cisco-nsp_at_puck.nether.net>
Subject: RE: Maximum traffic on Gigabit Ethernet

I am interested in this discussion as well. I have heard some engineers state that Cisco has a limit of 750Mbps on their GigE interface on any router or L3 Switch, but I have seen throughput of up to almost 1Gbps on a layer2 interface, with any size packet, and a throughput of around 750Mbps with 90-100 byte packet flood, on SVI and Layer3/routed ports, mainly because of the queue length/buffer of 75 packets on the interface. Never tried increasing the queue length and testing the routed or SVI interface throughput with small packets but would be eager to know if someone has done a more thorough testing!

Thanks,
Muhammad

> From: joe_at_affirmedsystems.com
> To: manafo_at_hotmail.com; ccielab_at_groupstudy.com; cisco-nsp_at_puck.nether.net
> Subject: RE: Maximum traffic on Gigabit Ethernet
> Date: Mon, 3 Oct 2011 14:08:43 +0000
>
> A lot of this has to do with packet size... what packet size does your application use? Jumbo? Imix? 1500? 64 byte?
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Manaf Al Oqlah
> Sent: Monday, October 03, 2011 9:48 AM
> To: Group Study; cisco-nsp_at_puck.nether.net
> Subject: Maximum traffic on Gigabit Ethernet
>
> Hi,
>
> What is the maximum traffic that a gigabit Ethernet interface can handle on
> Cisco 7600 router RSP720-3C-GE before dropping packets . we are able to reach
> 750 mbps / 125 mbps input/out rate!
>
> thank you
>
>
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Received on Mon Oct 03 2011 - 15:26:24 ART