7210 SAS-M, T, R6, R12, Mxp, Sx, S Basic System
Configuration Guide
Virtual Chassis
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During the boot process, the system designates one of the configured CPM-IMM
nodes as the active and the other as the standby CPM-IMM. If the active CPM-IMM
fails, the standby CPM-IMM takes over the active role. It is possible to upgrade an
existing IMM-only node to be a CPM-IMM node so that if an existing CPM-IMM node
fails, another node can take on its role. See Configuration Guidelines for Upgrading,
Adding, or Removing a VC Node for more information about upgrading an IMM-only
node to a CPM-IMM node. It is also possible to add a new node to the VC as a CPM-
IMM node in the event that an existing CPM-IMM node must be replaced; however,
there are restrictions. See Permitted Platform Combinations in a VC for more
information. For information about adding and removing nodes in different scenarios,
see VC Boot Scenarios.
5.1.2 Permitted Platform Combinations in a VC
Not all combinations of 7210 SAS-Sx 1/10GE and 7210 SAS-S 1/10GE platform
variants can be configured as CPM-IMM nodes and assume the role of the active and
standby CPM in a VC. Only platforms with similar capabilities can be configured as
CPM-IMM nodes.
This restriction does not apply to nodes acting as IMM-only nodes. Any
7210 SAS-Sx 1/10GE variant or 7210 SAS-S 1/10GE variant (PoE and non-PoE,
fiber and copper) can be configured as an IMM-only node to operate with any of the
supported combinations of CPM-IMM nodes.
Table 25 lists the supported combinations of 7210 SAS-Sx 1/10GE and
7210 SAS-S 1/10GE variants that can be configured as CPM-IMM nodes.
Table 25 Supported Node Combinations for CPM-IMM Configuration
CPM-A CPM-B CPM-IMM
7210 SAS-Sx 1/10GE (any variant) 7210 SAS-S 1/10GE (any variant) No
7210 SAS-S 1/10GE (any variant) 7210 SAS-S 1/10GE (any variant) Yes
7210 SAS-Sx 1/10GE (any variant) 7210 SAS-Sx 1/10GE (any
variant)
Yes
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