Chapter 6: System Control Module (SCM)
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 180
Check the FPGA versions for the standby SCM slot and validate if any of the FPGA versions show TRANSIENT.
If they do not show TRANSIENT continue to next step.
If they do show TRANSIENT then a reload commit should be performed from the active SCM. The reload commit
command can take up to 40 minutes to complete.
Example of FPGA versions showing TRANSIENT
FPGA Versions: sandm = 08.04.00[TRANSIENT]
Boot Versions: boot0 = CMTS_BOOT0_V00.00.85
boot1 = CMTS_BOOT1_V00.09.62
boot2 = CMTS_BOOT1_V00.09.62
After the reload commit has completed perform a soft-switch from the active copy over to standby:
configure interface system-controller <slot> soft-switch
Where: xx = active SCM slot
If using telnet for access to the CMTS, the telnet session will be disconnected during the soft-switch and will require the
user to telnet back in.
12. Allow system to return to duplex. This can be confirmed by executing the show linecard status command. The
standby SCM should show IS Standby.
13. Check system for normal operation.
How to Replace an SCM in a C4c CMTS or a Simplex Chassis
Follow the steps below to replace a System Control Module (SCM) in a simplex system.
1. This procedure requires out-of-band management. Verify that you have a working console connection from your PC to
the serial port at the bottom of the faceplate of the SCM. See How to Cable the SCM for more information.
2. If you have made any changes to the CMTS configuration since the last write memory command was entered, execute
the write memory command again.
3. Back up the existing configuration of the SCM by performing the following steps:
Enter copy running-config BKUPMMDDYY.cfg
where BKUPMMDDYY is the name of your backup configuration file.
Use Secure FTP (SFTP) or FTP to transfer the backed-up configuration from the CMTS to your PC.
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