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Need to add memory to an 801 router

I need to upgrade to 12 Meg RAM on a Cisco 801 in order to run the IOSIP/FW PLUS IPSEC 56 feature set (so I can VPN tunnel to another PIX).

When ordering I noticed that the product comes with 4 mg RAM and 12 mg Flash.

How many slots for DIMM are on the 801?.. is there more than one. If there is 4 on the box in one slot, will i be able to put the additional 8 mg DIMM in a slot beside it to equal 12 MG...


Re: Need to add memory to an 801 router

The 801 comes with 4 MB of DRAM on board and a free memory slot that can hold an additional 4-MB or 8-MB DRAM module. For the procedure and more information, you could refer to the document 'Upgrading Memory in Cisco 800 Series Routers' at The document discusses the process in detail.

The 800 support page is a wonderful resource for tons of information on the router. You can get to the same by following the path Cisco > Technical Support > Hardware Support > Featured Products: Routers > 800 Series Routers.

Also, you might want to refer to the document 'Cisco 801-805  ISDN, Serial, and IDSL Routers' at

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