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