6509 Sup-7203b and 10G blades

[DARYLE DIANIS]

Can I run a 4 port 10gig module in a 6509 that has only Sup-720-3B supervisor?  Or do I need to upgrade to a Sup720-10G supervisor to get to 10gig speeds? 

[Jon Marshall]

Yes you can run it with a 720-3B and it will run at 10Gbps per port. It is a non-blocking module because it has a 40Gbps connection to the switch fabric. So you will be fine.

If you wanted to run VSS then you would need to upgrade the supervisor to sup720-10G.

See table 1 in this doc for compatability -

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/product_data_sheet09186a00801dce34_ps4835_Products_Data_Sheet.html

Jon

[DARYLE DIANIS]

thanks, one more question, when talking about the supervisor's supported it says "chassis will work in lowest common denominator mode".  what does that mean, lowest common denominator?

[Jon Marshall]

It is to do with when you mix and match PFC/DFC cards in the chassis and the system has to find a mode it can run with the different types. Have a read of this Q&A which explains it -

http://www.cisco.com/en/US/products/hw/switches/ps708/products_qanda_item09186a00809a7673.shtml

Jon

[DARYLE DIANIS]

thanks, excellent!

[Richard Michael]

Hello,

Just to add what jon said and to simplify the facts on whole,

There are two separate considerations here. First, is the PFC mode (3B/3C).  Second is the memory capacity (i.e. XL or not). The system will always support the lowest common denominator (PFC/DFC & memory) across the cards - determined
at bootup. A system's lowest common denominator settings do not change dynamically - they are determined at bootup.

For Eg :

When a system is already running in 3BXL mode and a 3C line card is inserted, the 3C line card will be powered down. This is done because the system is already running in support of the additional XL memory capacity and the inserted card is not able to support the XL capacity.

The next time you restart the system with 3BXL and 3C cards the PFC/DFC mode  and memory capacity comparison should put the system into 3B mode.

Find below the chart that you can keep it handy when you have such problems,

Thanks,

Ricky Micky

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[Richard Michael]

Hi,

Just to add few more stuffs to my earlier posts,

when you have a mix of various line cards that will also affect the mode in which the backplane of the switch will work on,

1) Flowthrough

2) Truncated

3) compact

Find below the document that will help you to understand these modes,

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_white_paper0900aecd80673385.html

Muchas gracias,

Ricky Micky

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[DARYLE DIANIS]

thanks!