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IPS memory capacity & upgrade options

i can't find any document showing the memory capacity of the cisco ips 4250 and any upgrading capabilities

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Re: IPS memory capacity & upgrade options

Cisco IOS IPS can support more than 1600 signatures, a number that is beyond the memory capacity of routers to accept. The SDFs have been developed as a convenient way to select and load the most vital signatures. Currently you can choose from three SDFs; they vary in size to enable you to select an SDF file according to the DRAM capacity of your routers. The available choices follow:

http://www.cisco.com/en/US/products/ps6634/products_white_paper0900aecd8043bc07.shtml

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