I connected "FE 0/1" (cisco 1841) to "Ethernet 1/0" ( NM-4E module in 2651 router). Both interfaces' status are up but their line protocol is down.
I sat both their speed to 10Mbps and their duplux to full but no luck.
Is this because i am using a straight-throught cable? According to my understanding all cisco routers uses "Auto-Mdix" feature which eleminates the need for cross-over cables.