I have a couple of routers as part of my home lab that I am using for my Cisco certification studies.  One thing that I wanted to do was connect two routers together via their T1 WICs.  There are two things you need to do:

  • create a T1 crossover to connect the routers
  • set the clock settings on each routers’ serial interface to simulate the T1

In another post I will put the details of making a T1 crossover cable, here is a simple example of the configuration you need to apply to each routers’ T1 serial interface.

**apply this to router #1**
 
ip address 192.168.1.1 255.255.255.248
 encapsulation ppp
 fair-queue
 service-module t1 clock source internal
 service-module t1 timeslots 1-24 speed 64
 service-module t1 framing esf
 service-module t1 linecode b8zs
 no shut
**apply this to router #2**
 
ip address 192.168.1.2 255.255.255.248
 encapsulation ppp
 fair-queue
 service-module t1 clock source internal
 service-module t1 timeslots 1-24 speed 64
 service-module t1 framing esf
 service-module t1 linecode b8zs
 no shut