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Chapter 6: System Control Module (SCM)

STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide

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.

Arris C4C User Manual

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