FYI: I used to use an 871 for my home network a number of years back. I found it to max out around 10-15mbps thruput. BUT I did have a really complex config on it then, VRFs etc. The 1800's can push 30-40mbps with common options on. I've found ~75-80% of the number in the right Mbps column of the cisco portable routing performance sheets to be fairly accurate in moderate configs: http://www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf
Upgrading the ram is a very cheap way to give a little extra life to these devices. I got maxed out ram for my ASA, my 1841 and my 2651xm for under $80 shipped on ebay. (especially if anyone intends to run stateful inspection on the 800 or 1800's) I once had shaw come out and replace my cable modem because HTTP was dropping out randomly (freaken inspection LOL). I only noticed that it was running out of memory when I plugged in a serial console and saw the backlog of messages. Theo On 2013-10-10, at 1:38 PM, David Stewart <[email protected]> wrote: > I took an hour or so break from studying and did some digging into the 871s. > > First up you can use a standard 64mb/128mb/(or in my case 256mb double sided) > pc133 cl3 sdram dimm to upgrade the memory from the default 128mb. The 128mb > dimm only gave me a 64mb boost so i tried the 256mb dimm and got the maximum > amount possible in an 871 series. > > Secondly, the flash on the board is only 20mb plus a 4mb strataflash chip on > a card (with decoupling caps, and 3-4 resistor points which are likely used > for id bits).......I think it might be possible to just buy a larger chip on > ebay, and swap them out, possibly with fiddling with the resistor locations > (currently unpopulated) on the board. I suspect however that this will > destroy the current firmware/flash filesystem on the router so a serial > xmodem transfer is probably required to realize this. One could always just > try and find a cheap cisco branded card of course..... > > Finally, the 871s have an internal mini pci (not mini pci-e!) slot, and if > you have an Atheros ar5212 based wifi card from a circa 2005 > dell/acer/whatever laptop, you can do a bit of work in rommon and enable > wireless functionality (albeit a/b/g only). > > References: > > > Ram expansion: > http://www.instructables.com/id/Adding-Off-The-Shelf-Memory-to-a-Cisco-871/ > > Wlan card: > http://cmc.site11.com/2012/11/how-to-turn-a-cisco-871-into-a-871w-wireless-router/ > > Cheers, > > David Stewart >
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