Juniper SRX 5800, Hardware Manual

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Table 71: Expected Device Behavior and Minimum SRX5K-SCBE and Fabric Plane Requirements
Expected Behavior After the SCB and
Routing Engine are Removed
Redundant
Planes
Active
Planes
Number of
SRX5K-SCBs Platform
If the SCB in the primary node fails, the device
will fail over to the secondary node as the
primary node powers off.
0 (virtual) 4 (virtual) 1 SRX5400
If the active SCB in the primary node fails, the
behavior of the device does not change as the
redundant SCB becomes active provided all
four fabric planes are in good condition.
If the second SCB in the primary node fails,
the device will fail over to the secondary node
as the primary node powers off.
4 (virtual) 4 (virtual) 2 SRX5600
This device supports one SCB for two fabric
planes, providing a redundancy of three SCBs.
If the active SCB fails, the device behavior
does not change as the remaining two SCBs
fulfill the requirement to have four fabric
planes.
If the second SCB also fails, no spare planes
are available in the chassis triggering
inter-chassis redundancy. Therefore, RG1+
will fail over to the secondary node.
2 4 3 SRX5800
NOTE: In SRX5600 and SRX5800 Services Gateways, failover does not happen when the
secondary Routing Engine in slot 1 fails, while the SCB in slot 1 is inactive.
For detailed information about chassis cluster, see the Chassis Cluster User Guide for Security Devices at
www.juniper.net/documentation/ .
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