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19 messages in net.nether.puck.cisco-nsp[c-nsp] Cisco 6509 and Bus speeds| From | Sent On | Attachments |
|---|---|---|
| Marcel Lemmen | Jan 13, 2005 7:44 am | |
| Colin Whittaker | Jan 13, 2005 8:23 am | |
| Arnold Nipper | Jan 13, 2005 8:32 am | |
| Paul Schopis | Jan 13, 2005 11:16 am | |
| Clinton Work | Jan 13, 2005 11:17 am | |
| Arnold Nipper | Jan 13, 2005 11:28 am | |
| Ethern M.C. Lin | Jan 13, 2005 11:36 am | |
| Arnold Nipper | Jan 13, 2005 11:42 am | |
| Tim Winders | Jan 13, 2005 11:43 am | |
| Tim Stevenson | Jan 13, 2005 11:51 am | |
| Tim Stevenson | Jan 13, 2005 11:51 am | |
| Tim Stevenson | Jan 13, 2005 11:51 am | |
| Mikael Abrahamsson | Jan 13, 2005 12:12 pm | |
| Ryan O'Connell | Jan 13, 2005 12:23 pm | |
| Ian Cox | Jan 13, 2005 3:38 pm | |
| Brad Bonin | Jan 13, 2005 3:44 pm | |
| Tim Stevenson | Jan 13, 2005 4:12 pm | |
| Paul Schopis | Jan 13, 2005 4:17 pm | |
| Michael Loftis | Jan 13, 2005 5:12 pm |
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| Subject: | [c-nsp] Cisco 6509 and Bus speeds | Actions... |
|---|---|---|
| From: | Colin Whittaker (coli...@heanet.ie) | |
| Date: | Jan 13, 2005 8:23:00 am | |
| List: | net.nether.puck.cisco-nsp | |
On Thu, Jan 13, 2005 at 01:45:03PM +0100, Marcel Lemmen wrote:
Hi all,
My company is looking for a replacement of our Cisco 4006 and we're looking at the 6509 with Sup720. I do however have some questions regarding the Bus and backplane speeds which are a bit unclear to me. Perhaps somebody could help me with this one.
We are looking for a configuration with a Sup720, 2x 4 port 10GE line-cards, a 48port 10/100/1000 and a 24port 1GigE SFP.
I have some nasty experiences with promised performance and actual performance, like a 7500 with GEIP+ witch only handles 400Mbit/s, a 4006 switch with 3x24Gbit/s SwitchEngines and gives packetloss at 1.8Gbp/s etc.
The c6509 with Sup720 can handle 720Gbps of switching traffic in total, but what happens if I transfer 40Gbps from one slot to the other slot with 4x10GE (since we have 8 10GE ports)? As far as I know the c6509 has a 8Gbps backplane and therfor you shouldn't be able to transfer more then 8Gbps from one slot to another, or am I wrong in this one? Using dCEF it would be possible to transfer 40Gbps of traffice within one slot but not between slots or not?
Could someone explain this to me because I want to know a bit more about the architecture so I won't make the same mistake as I did earlier :)
With the sup720 there is 720Gbps of switching capacity in the fabric, which is seperate to the shared backplane. The shared backplane is still used for sending data to and from the Sup which is where the 32M PPS is from, with framing overhead on 32Million packet headers can be bumped to the supervisor. With DFCs on the line cards these headers never leave the card.
To Actually push 40Gbps between two slots you will need the DFCs.
Colin