ISDN
Sunday, 18 May 2008 14:02
Enconding / Framing
Encoding Framing
T1 B8ZS + AMI SF +ESF
E1 HDB3 CRC4
BRI
Creating an ISDN BRI connection between 2 routers
On the router dialing out,
hostname(config)#IP Route <Dest Subnet> <Dest Mask> <Via>
hostname(config)#Username <Username> Password <Password>
hostname(config)#Isdn switch-type <type>
hostname(config)#Dialer-list 1 protocol ip <acl/permit all ip>
hostname(config-if)#Interface bri 0
hostname(config-if)#IP address <IP Address>
hostname(config-if)#Encapsulation PPP
hostname(config-if)#PPP encapsulation CHAP
hostname(config-if)#Isdn spid <spid>
hostname(config-if)#Dial idle-timeout <amount of time>
hostname(config-if)#Dial fast-timeout <amount of time>
hostname(config-if)#Dialer string <number to dial>
hostname(config-if)#Dialer map ip <dest isdn router interface> broadcast name <description> - Use dial map if more then one site
hostname(config-if)#Dialer-group 1
hostname(config-if)#No shutdown
On the router receiving,
hostname(config)#Interface BRI0
hostname(config-if)#IP adress <IP Address> <Subnet>
hostname(config-if)#Encapusaltion PPP
hostname(config-if)#PPP encapsulation CHAP
hostname(config-if)#Isdn switch-type <type>
PRI
Creating an ISDN Pri connection,
hostname(config)#Controller t1 1/0
hostname(config)#Framing <type>
hostname(config)#Linecode b8zs
hostname(config)#Pri-group timeslots 1-24
hostname(config)#IP Route <Dest Subnet> <Dest Mask> <Via>
hostname(config)#Username <Username> Password <Password>
hostname(config)#Isdn switch-type <type>
hostname(config)#Dialer-list 1 protocol ip <acl/permit all ip>
hostname(config)#Interface serial 1/0:23
hostname(config-if)#IP address <IP Address>
hostname(config-if)#Encapsulation PPP
hostname(config-if)#PPP encapsulation CHAP
hostname(config-if)#Dial idle-timeout <amount of time>
hostname(config-if)#Dial fast-timeout <amount of time>
hostname(config-if)#Dialer string <number to dial>
hostname(config-if)#Dialer map ip <dest isdn router interface> broadcast name <description> - Use dial map if more then one site
hostname(config-if)#Dialer-group 1
Dialer Profiles
Allows different sites to dial across different interfaces. The interface can be thought of as a virtual interface which connects multiple physical interfaces.
To create a Dialer Profile on a router you need to do the following,
hostname(config)#Interface dialer 1
hostname(config)#Dialer remote-name <site name>
hostname(config)#Dialer string <IP> <Number to dial>
hostname(config)#Dialer pool <add interface to pool>
Within the ISDN interface to add it to a pool,
hostname(config)#Interface BRI0
hostname(config-if)#Dialer pool-member <number>
Multi-Link PPP
Allows data to be load balanced over various B channels.
hostname(config)#Interface BRI0
hostname(config-if)#Dialer load-threshold <load> <outbound/inbound/either>
hostname(config-if)#PPP Multilink
Show/Debug Commands
Show dialer interface bri 0
Show interface bri 0:1
Show isdn active
Show isdn status
Debug isdn q931
Debug dialer events
Debug dialer packets