sup720-3B

Answered Question
Jun 11th, 2008
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The sup720-3B supports 256k routes, if I was to upgrade this supervisor to 1GB of ram from 512MB, will this allow me to support 1 million routes like the sup7203bxl or is this not possible?

Correct Answer by gpulos about 9 years 1 month ago

In short, No. Upgrading the 3B to 1gb rp/sp memory will not allow the FIB to scale to 1,000,000 routes.


The 720-3B is scalable UPTO 256k routes. This is due to the 'forwarding information base' design in this sup that scales to 256k routes only.


The 3BXL has a FIB that will scale to 1,000,000 routes of IPv4. (500,000 of ipv6)


Please see the following link for more info on the 3B:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_bulletin0900aecd8017a5e7.html


The following link is a data sheet that describes all 720 versions:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/product_data_sheet09186a0080159856.html

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Correct Answer
gpulos Wed, 06/11/2008 - 07:07
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In short, No. Upgrading the 3B to 1gb rp/sp memory will not allow the FIB to scale to 1,000,000 routes.


The 720-3B is scalable UPTO 256k routes. This is due to the 'forwarding information base' design in this sup that scales to 256k routes only.


The 3BXL has a FIB that will scale to 1,000,000 routes of IPv4. (500,000 of ipv6)


Please see the following link for more info on the 3B:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_bulletin0900aecd8017a5e7.html


The following link is a data sheet that describes all 720 versions:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/product_data_sheet09186a0080159856.html

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