Problems with clockrate between 2501 and 2503

[johfer]

I've got a 2501 and a 2503 connected back-to-back with DCE-DTE serial cable.

The highest clockrate I can set is 500000, after that the connections goes down. At that clockrate the highest throughput is ~500Kbps. Shouldn't I be able to crank that number up a bit?

I thought the serial interface was supposed to handle T1 lines, and those are ~1500Kbps as far as I know..?

This is how I configure s0 on one of the routers:

!
interface Serial0
ip address 10.0.1.5 255.255.255.252
clockrate 500000
!

(Ofcourse I only set clockrate on one of the routers, the right one, since I get connection with that clockrate

Any tips?

 

[katamann]

Synchronous interfaces should be able to handle ~4Mbit/s.
Check the interfaces on both sides for errors with show ip int s0, show interface s0 and show controler. Maybe a bad cable?