Configuring the Dialer

Configuring the Dialer

There are five steps to configuring the dialer information:

1. Choose the interface.

2. Set the IP address.

3. Configure the encapsulation type.

4. Link interesting traffic to the interface.

5. Configure the number or numbers to dial.

Here’s how to configure those five steps:

804A#config t

804A(config)#int bri0

804A(config-if)#ip address 172.16.60.2 255.255.255.0

804A(config-if)#no shut

804A(config-if)#encapsulation ppp

804A(config-if)#dialer-group 1

804A(config-if)#dialer string 8350661

Instead of the dialer string command, you can use a dialer map command. It provides

more security. Here is an example:

804A(config-if)#dialer map ip 172.16.60.10 name 800B

8350661

ISDN BRI configuration

For each ISDN BRI interface, you need to specify the SPIDs that are configured for the circuit by the service provider using the isdn spid1 and isdn spid2 interface subcommands. These are provided by the ISDN provider and identify you on the switch, sort of like a telephone number. Some providers no longer require SPIDs to be configured on the router. Check with yours

to be sure. The second part of the SPID configuration is the local directory number for that SPID. It’s optional, but some switches need to have those set on the router in order to use both B channels simultaneously. Here’s an example:

RouterA#config t

Enter configuration commands, one per line. End with CNTL/Z.

RouterA(config)#isdn switch-type basic-ni

RouterA(config)#int bri0

RouterA(config-if)#encap ppp (optional)

RouterA(config-if)#isdn spid1 086506610100 8650661

RouterA(config-if)#isdn spid2 086506620100 8650662