SRX3600 Services Gateway SRX Clustering Module

The SRX Clustering Module (SCM) is a card that you can install in the services gateway to enable the dual control link feature for chassis cluster supported in Junos OS Release 10.2. You install the SCM in the RE1 slot on the rear panel of the services gateway. The SCM is shown in Figure 14.

Figure 14: SRX Clustering Module

SRX Clustering Module

Note: The services gateway must be running Junos OS Release 10.2 or later to use the SCM. When running earlier Junos OS Releases, the services gateway does not properly recognize it.

For more information about configuring and managing chassis clusters, see the chapter “Chassis Cluster” in the Junos OS Security Configuration Guide PDF Document.

Table 19 describes the SCM behavior indicated by the LED on its front panel.

Note: The ONLINE button on the SCM front panel does not perform any function.

Table 19: SRX Clustering Module LED Indicators

LED Label



Indicated Behavior



One or more of the following conditions apply:

  • The services gateway is not powered on.
  • The services gateway is still in the process of either booting or shutting down.
  • The services gateway is not configured for chassis clustering.


On steadily

The services gateway is configured for chassis clustering, and the SCM is operating normally.


The SCM is initializing (preparing to come online) or is preparing to go offline.


On steadily

The SCM has failed and is not operating normally.

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