If a second SCM is installed, it works as a backup SCM. In this case, master SCM and backup
SCM are independent of their slots. If the master SCM fails, the backup SCM automatically takes
over the work of the master SCM to ensure business continuity.
Notes:
l Do not perform any configuration on the backup SCM.
l After the switchover, the new backup SCM still works in the Backup mode after reboots.
l After the switchover, the management interface should be reconnected.
l To ensure that license information is synchronized, the system prompts you to restart the
device ( restart after disconnecting the network) after you install specific licenses. You are
required to perform operations following the prompt.
Security Service Module (SSM)
Security Service Module (SSM) is a hardware platform card that performs data processing other
than QoS.
The device should have at least one SSM installed. You can install more SSMs to escalate system
performance. SSMs should be installed in the general expansion slots.
QoS Service Module (QSM)
QoS Service Module (QSM) is a hardware platform card that solely performs Quality of Service
(QoS) processing.
l SG-6000-X10800/X9180 can process Qos with IOM/SIOM if no QSM is installed.
l SG-6000-X8180 can process Qos with SIOM if no QSM is installed.
l SG-6000-X7180 can process Qos with IOM if no QSM is installed.
l SG-6000-X6180/X6150 cannot process Qos if no QSM is installed.
You can install one or more QSMs and they should be installed in general expansion slots.
4
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