Chapter 6: System Control Module (SCM)
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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ethernet interface. The SCM PIC-resident ethernet interface has no Link/Activity LEDs. If running a duplex system, any
changes made to one SCM will also affect the other SCM.
The front panel Ethernet interface will support and advertise the following speeds;
10baseT (portType eport10BaseT(3)),
100baseT (portType eport100BaseT(4)), and
1000baseT (portType eport1000BaseT(4)), full duplex
Upgrading a C4 CMTS to an SCM 3
Due to hardware incompatibilities, SCM 3s cannot become fully operational in the same chassis with prior-version SCMs.
This makes a hitless chassis upgrade impossible: all upgrade scenarios will involve the chassis being down for some amount
of time.
The SCM 3 Compact Flash will work with the SCM II EM(U) but it is not compatible with any other prior-version SCM.
Assumptions:
The C4 CMTS is running with SCM II, SCM II EM and SCM II EM(U) active/standby and running SW version 8.2.
The SCM 3 flash disk is pre-programmed at the factory with at least:
the Release 8.1.x (or later) image
null config file (skeleton database)
SCM 3 Upgrade Procedures
There are four possible scenarios, covered by the following procedures, to use when upgrading to an SCM 3:
Upgrade to an SCM 3 with the Compact Flash from an SCM II EM(U)
Upgrade to an SCM 3 Using the Serial Console Port (RS 232) Only
Upgrade to an SCM 3 Using the OOBM Ethernet Interface (via rear port of the SCM PIC)
Upgrade to an SCM 3 Using the OOBM Ethernet Interface (via front port of the SCM 3 Module)
"OOBM" is an abbreviation for out-of-band management.