""Salvatore De Luca"" wrote in message ... > I am inquiring about the internal physical bus layout on the > 6509. I have Dual supes, w/ MSFC2's, running SRM HA, but my > quesion relies specifically on slot 6 and slot 9. I am using CATOS > 6.3.5 and MSFC IOS 12.1.(8). Do these 2 slots work on seperate or > same BUSES? Basically do these slots rely on the same integrated > BUS architecture, or are they completley seperate.. My question > may seem a but vauge.. but any informaion on the reliance of certain > slot buses to each other in an event of a bus failure would be > appreciated..
it's one bus -- 16 Gbps shared across all modules. All traffic even port-to-port on the same module hits this bus. cisco says 32 Gbps full-duplex, but all my numbers refer to one-way traffic, since that is where most people hit limitations. you didn't say whether you have Sup1/Sup1A's or Sup2's. let me assume sup2 for a second here (the above rule applies to Sup1/Sup1A). if you get the SFM2 module, and put one (or a redundant pair) into slot(s) 5 or 6 (on a 6509 chassis), then in the case of IP packets, the headers will travel across the aforementioned 16 Gbps shared bus, but there will also be either 1 or 2 connections to the SFM2 card (here-on referred to as the "128 Gbps switch fabric") at 8 Gbps each (so 8 Gbps or 16 Gbps). The payloads of your packets will travel across this 128 Gbps switch fabric. If you have something called a DFC on your module, along with the 128 Gbps switching fabric, then traffic on that module that is port-to-port will stay on the module and not touch either the 16 Gbps shared bus or the 128 Gbps switch fabric. Each module (assuming just one module is pushing traffic) is capable of taking up all of the 16 Gbps shared bus. However, in the case of the 128 Gbps switch fabric, each module has only so much bandwidth connected to that fabric, either 8 Gbps or 16 Gbps depending on the module type. Going into the individual modules or explaing the Sup720 is going a bit beyond this conversation, but let me know if you need further help identifying limitations on the Catalyst 6500 platform. Also, IMO, you should be running at the very least 6.3(7) (but the highest code release on that train is 6.3(9)) -- actually the 6.3.x train *is* the 6.4.x train (so no real need to worry about upgrading), so in reality you should be running CatOS 6.4(3). While I think SRM is a good idea, I prefer to go to SupIOS (12.1.13E5 would be an excellent choice) and use RPR+. If you absolutely need CatOS for some reason (none that I can think of anymore), then you might also want to go to 7.4(3) (if you have Sup1 or Sup1A's with only 64MB DRAM) or 7.5(1) (if you are using Sup2's or have Sup1/Sup1A's with 128MB DRAM). -dre Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=69807&t=69740 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
