I config router 2811 with HWIC 16A as terminal server to manage 3 router and 3 swich.
the cable I use to connect to devices: CAB-HD8-ASYNC. I insert the HWIC 16A to slot 3 of router so the port should be: 2050->2065.
I confirm them by using "show line' command. HWIC 16A has two interface: 0-7 and 8-15. Now I use interface 0-7. The same problem when I try to use int 8-15.
I also change slot use with HWIC 16A and change port to match.
when I try to connect, I get error:
Trying m51 (172.16.0.1, 2051)... Open
Trying m52 (172.16.0.1, 2052)... Open
Trying m53 (172.16.0.1, 2053)... Open
Trying m54 (172.16.0.1, 2054)... Open
Trying m55 (172.16.0.1, 2055)... Open
Trying m56 (172.16.0.1, 2056)... Open
I would try to securely reseat the NM and also reseat the cable on the NM. There may be a poor connection or a hardware problem here with the NM or the cable. Do you have a spare of either to test? All of the ports fail the same way, right?