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Verifying Network Clocks and Controller Settings
Step
Command
10
Router(config)# linecode b8zs
or
Router(config)# linecode hdb3
11
Router(config)# mode atm
12
Router(config)# network-clock base rate {56k | 64k}
Verifying Network Clocks and Controller Settings
To verify the configuration of network clock sources and controller settings, follow the steps below.
Step 1
Step 2
6
Cisco IOS Release 12.0(7)T
Enter the privileged EXEC show network-clocks command to see the status of clock
source settings.
Router# show network-clocks
Priority 1 clock source(inactive config): T1 0
Priority 1 clock source(active config) : T1 0
Enter the privileged EXEC show controllers t1 or show controllers e1 command to see
the status of T1/E1 controllers.
router# show controller t1 1
T1 1 is up.
Applique type is Channelized T1
Cablelength is long gain36 0db
No alarms detected.
Slot 4 CSU Serial #07789650 Model TEB HWVersion 4.70 RX level = 0DB
Framing is ESF, Line Code is B8ZS, Clock Source is Internal.
Data in current interval (819 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Data in Interval 1:
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Data in Interval 2:
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Purpose
Set the line coding to binary zero 0 substitution (B8ZS),
required for ATM on T1. This setting is automatic for T1
when the ATM mode is set.
Set the line coding to HDB3, required for ATM on E1.
This setting is automatic for E1 when the ATM mode is
set.
Configure the controller for ATM traffic. This allows the
controller to support ATM encapsulation and create
virtual ATM interface 0 for SVCs and PVCs. Controller
framing is automatically set to extended superframe (ESF)
on T1 and to CRC4 on E1. The line coding is
automatically set to B8ZS on T1 and to HDB3 on E1.
Channel groups, channel-associated signaling (CAS)
groups, common channel signaling (CCS) groups or clear
channels are not allowed on the trunk because ATM traffic
occupies all the DS0s.
Set the network clock base-rate for the serial ports. The
default is 56 kbps.
At this point, you can also configure network
Note
protocol settings such as IP hosts. For more information,
see the Cisco IOS Release 12.0 network protocol
configuration and command reference guides.
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