Specifications

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Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide
Release 3, Part Number 78-14788-01 Rev. C0, January 2004
Chapter 7 Switch Operating Procedures
Managing Manually Configured Clocks Sources
In the following example, the display shows that both the primary and secondary clocks are configured
for network clock sources. The primary clock source is coming from port 4 on the AXSM card in slot
10. The primary clock source is active. The secondary clock source is coming from port 1 on the AXSM
card in slot 9.
pop20one.7.PXM.a > dspclksrcs
Primary clock type: generic
Primary clock source: 10:2.2:4
Primary clock status: ok
Primary clock reason: okay
Secondary clock type: generic
Secondary clock source: 9:1.1:1
Secondary clock status: ok
Secondary clock reason: okay
Active clock: primary
source switchover mode: non-revertive
Reconfigure Clock Sources
The procedure you use to reconfigure a clock source depends on whether or not you need to change the
role of the clock source. If the clock source keeps its role as either primary or secondary, just enter a new
cnfclksrc command as described in the following locations:
• To reconfigure a clock source for a BITS clock, see the “Configuring Clock Sources” section in
Chapter 2, “Configuring General Switch Features.”
• To reconfigure a clock source to use an AXSM line, see “Configuring AXSM Line Clock Sources,”
in Chapter 6, “Provisioning AXSM Communication Links.”
When reconfiguring a clock source from primary to secondary or from secondary to primary, you must
delete both existing clock sources and define new clock sources. The switch will not allow you to create
two primary or two secondary clock sources, and the switch will not allow you to configure the same
line as both primary and secondary clock sources. After you have deleted the old clock source, you can
use the appropriate procedure (referenced above) to define a new clock source.
To delete a clock source, enter the delclksrc command as described in the next section.
Delete Clock Sources
Deleting a clock source deletes the definition of the clock source, not the clock source itself. You might
want to delete a primary or secondary clock source definition so that you can reassign the clock source
to another line.
To delete a clock source, use the following procedure.
Step 1 Establish a configuration session using a user name with SUPER_GP privileges or higher.
Step 2 Display the clock source information by entering the dspclksrcs command.
You will need the information in this display to delete the clock source.