Router R15 Configuration

R15(config)#username <remote name> password <isdnpassword>

R15(config)#isdn switch-type <switch type>

R15(config)#controller <controller eg T1> <slot/port>

R15(config-controller)#framing {sf | esf | crc4} sf/esf for T1 crc4 for E1

R15(config-controller)#linecode {ami | b8zs | hdb3} normally b8zs for T1 hdb3 for E1

R15(config-controller)#pri-group timeslots <range> 1-24 for T1 1-31 for E1

R15(config-controller)#interface serial{slot/port:unit or ts} 3/0:23 for T1 3/0:15 for E1

R15(config-if)#isdn switch-type <switch type> if individual interfaces have different type

R15(config-if)#no cdp enable

R15(config-if)#encapsulation ppp

R15(config-if)#ppp authentication [chap | pap]

R15(config-if)#ip address <ip addr> <subnet mask>

R15(config)#Router RIP

R15(config-router)#network <ip addr> (IP of ISDN network)

R15(config)ip route 0.0.0.0 0.0.0.0 <ip addr> (IP of next hop to outside world, eg R12)

Router show and debug commands

show run

show isdn [ status | active ]

show interfaces

debug ppp [ authentication | packet | negotiation | error | chap | tasks ]

debug isdn [ q921 | q931 ]