Sir...i have cisco 1721 router. i have connected serial 0 port to 64 kbps modem and serial 1 to another 64 kbps modem.now both modems are connected back to back by 4 wire...but the serial ports are showing "serial up,line protocol down". and it is not showing any loop given from modem..configurations are correct modem also fine.router also showing serials ports connecting LED.....so where is the problem...
626 views
Usually answered in minutes!
hi ,
I have Cisco 1721 router.On modem line showing ok but in router line protocol showing down
Please Help?
Thanks& Regard,
Pradip
can you please paste here the interface of s0?
thanks
Sir,
Are you using the same 4 or 8 wire cord to the demarc for both modems? It may seem obvious, but...
lanmster
×