Hi,
I hope this is a good place to ask this question:
I have two Cisco 1721 routers. I am running IOS 12.4 / 12.3 (memory constraint on one). Both are Ethernet / Ethernet using WIC-1ENET cards. I am looking for a way to improve performance; can I change the WIC-1ENET (10baset) for a WIC-4ESW and run instead at Full-duplex / 100Mbps? Are there any considerations e.g. like IOS version? If this is possible, do you think this is a good idea (I have read that there may be a 10Mbps limitation on the processor?)?