Installation guide

5-22 Cisco 4000 Series Installation Guide

Additional Configuration Tasks

Step 12 Exit the privileged level and return to the user level:

Router# disable

Conﬁguring the Synchronous Serial Interfaces

If you have a serial network processor module installed, you need to conﬁgure the

synchronous serial interfaces to allow connection to WANs through a CSU/DSU. Take the

following steps to conﬁgure the serial ports:

Step 1 Determine which protocols you will allow on the synchronous serial interface

and enter the appropriate responses:

Configure IP unnumbered on this interface? [no]: no

IP address for this interface: 172.16.73.1

Number of bits in subnet field [8]:

Class B network is 172.16.0.0, 8 subnet bits; mask is 255.255.255.0

Configure AppleTalk on this interface? [no]: yes

Extended AppleTalk network? [yes]:

AppleTalk starting cable range [2]: 3

AppleTalk ending cable range [3]: 3

AppleTalk zone name [myzone]: ZZ Serial

AppleTalk additional zone name:

Configure IPX on this interface? [no]: yes

IPX network number [2]: B000

Step 2 Repeat Step 1 for the remaining serial interfaces.

The following sections describe the commands for conﬁguring an external clock signal for

a data communications equipment (DCE) interface and for conﬁguring a port for NRZI

encoding or 32-bit cyclic redundancy check (CRC). Conﬁguration commands are executed

from the privileged level of the EXEC command interpreter. (For G.703/G.704 interface

conﬁguration, see the section “Conﬁguring G.703/G.704 Interfaces” later in this chapter.)