commands are described in the upcoming text. For example, the switch types are a required
parameter for connection to DMS-100 or National ISDN switches; ask your service provider
for the type of switch at each site. The LosAngeles BRI is attached to a National ISDN switch
in this case. The switch type can be configured with the isdn switch-type command, which can
be used as a global command, or with an interface subcommand if the router is connected to
multiple different types of ISDN switches. The SPIDs might not be required; they are used
as a form of authentication by the switch. The SPIDs are configured with BRI interface
subcommands on SanFrancisco. Also, hidden in part of the DDR configuration, the speed of the
B channel from SanFrancisco to GothamCity will be 56kbps, according to the speed parameter
in the dialer map command on SanFrancisco.
configuration is covered earlier in this chapter, in the section "PAP and CHAP."
to LosAngeles:
dialer map ip 172.16.2.1 broadcast name LosAngeles 14045551234
dialer map ip 172.16.2.3 broadcast speed 56 name GothamCity 1999999999901
dialer-group 2
!
router igrp 6
network 172.16.0.0
!
interface bri 0
encapsulation ppp
ppp authentication chap
isdn switch-type basic-ni1
!
router igrp 6
network 172.16.0.0
BRI0:1 is down, line protocol is down
Hardware is BRI
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
LCP Open
Open: IPCP, CDPCP
Last input 00:00:05, output 00:00:05, output hang never