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Configuring Synchronous Serial Interfaces for WAN Support
Configuring Synchronous Serial Interfaces for WAN Support
Configure the synchronous serial interfaces on the E1 or T1 PRI card to connect to a WAN through
a CSU/DSU.
This section describes how to enable the serial interface, specify IP routing, and set up external clock
timing on a DCE or DTE interface. To use a port as a DTE interface, you need only connect a DTE
adapter cable to the port. When the system detects the DTE mode cable, it automatically uses the
external timing signal. To use a port in DCE mode, you must connect a DCE interface cable and set
the clock speed with the clock rate configuration command. You must also set the clock rate to
perform a loopback test.
Note
8 Mbps on serial interface 0 by shutting down the other three interfaces using the e2-clockrate
command on serial interface 0.
Configure
Table 3-6
Step
1
2
3
4
5
6
7
3-8
Cisco AS5300 Universal Access Server Software Configuration Guide
The four serial interfaces each support a clock rate of 2 Mbps; you can support a rate of
Configuring Serial Interfaces
Command
5300> enable
Password: <password>
5300#
5300# configure terminal
Enter configuration commands, one per line. End
with CNTL/Z.
5300(config)#
5300(config)# interface serial 0
5300(config-int)# ip address 145.22.4.67
255.255.255.0
5300(config-int)# clock rate 2015232
5300(config-int)# no shutdown
5300(config-controller)# Ctrl-Z
5300#
%SYS-5-CONFIG_I: Configured from console by
console
Purpose
Enter enable mode (also called
privileged EXEC mode).
Enter the password.
You have entered enable mode when the
prompt changes to
.
5300#
Enter global configuration mode. You
have entered global configuration mode
when the prompt changes to
5300(config)#.
Specify the first interface to be
configured.
If IP routing is enabled, assign an IP
address and subnet mask to the interface.
Configure the external clock signal only
if you are configuring a DCE interface.
The available options include 1200,
2400, 4800, 9600, 14400, 19200, 28800,
38400, 56000, 64000, 128000, and
2015232.
Change the shutdown state to up and
enable the interface.
Return to enable mode.
This message is normal and does not
indicate an error.
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