So we replaced a failed HP (sigh..should have had a Cisco in all along) switch with a backup Cisco 2924-XL. Performed basic config, and plugged it into our 2611 Router. Connection was just fine...THEN:
I went and enabled trunking/encapsulation on interface FastEthernet0/1 with the following (no errors):
switchport trunk encapsulation dot1q
switchport mode trunk
Our connection was fine until the above. Interface 0/0 on the router is also configured for encapsulation and now it seems the switch and router are not communicating.
When I bring it up in CNA, it shows the router as an "Unsupported Device". I downloaded and installed the latest image for this 2924XL and it installed fine...Image file: c2900xl-c3h2s-mz.120-5.WC17.bin
Any ideas? My gratitude ahead of time!