Chapter 6: System Control Module (SCM)
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 179
The SCM 3 can only be operated in software Release 8.1 or later. Also, the SCM 3 is not compatible with SCMs or SCM IIs in
duplex systems.
5. Allow the CMTS to return to duplex. Confirm by executing the show linecard status command. The standby SCM will
display IS Standby.
6. Depending on the current firmware version of the new SCM, the system may require a reload commit. Log into the
standby SCM and enter the following command:
show version detail
Using the system output, verify that the FPGA versions show TRANSIENT.
If they do not show TRANSIENT continue to next step.
If they do show TRANSIENT then perform a reload commit from the active SCM. The reload commit command can
take up to 40 minutes to complete.
Example of FPGA firmware in TRANSIENT state:
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
7. Perform a soft-switch to switch the active pair over to standby by entering the following command:
configure interface system-controller xx 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.
8. Allow system to return to duplex. Confirm by executing the show linecard status command. The standby SCM card
should show IS Standby.
9. Unplug the standby SCM and plug in the replacement SCM.
10. Allow the system to return to duplex. This can be confirmed by executing the show linecard status command. The
standby SCM should show IS Standby.
11. Depending on the current firmware version of the new SCM, the system may require a reload commit. Log into the
standby SCM card and enter:
show version detail
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