Cisco 2801 and 2811 couldn’t connected

[PengyuGuanAu]

hi there,

I bought a CCNA lab kit from eBay  recently which included 3 routers and 3 switches.

When I trying to connect router 2801 to 2811 with fast Ethernet port. Shows the status up and protocol down, I matched all the parameters are same. After that I disconnected, and connect these two router separately to my home wireless router, both are working ok. I don’t why these two Cisco router couldn’t connecting each other 

 

[Leo Laohoo · Accepted solution]

Cross-over cable?

[PengyuGuanAu]

Thanks. I double checked it is not crossover cable. I forgot this very basic fundamental knowledge.