Nokia 7210 Configuration Manual page 246

Virtual Chassis
CPM-IMM nodes store information to detect whether a reboot is occurring due to a
VC split. If a split has occurred, the node attempts to connect to the current active
CPM-IMM. When it talks to the active CPM-IMM and boots up successfully, it clears
the stored VC split information. If the CPM-IMM node is unable to talk to the current
active CPM node, it will reboot and start the process all over again until it can
successfully talk to an active CPM.
Users can clear the VC split information stored in the database and stop the reboot
process by interrupting the boot process and providing a Yes response at the boot
loader prompt to clear the VC split information.
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in island with the standby CPM-IMM all reboot (including the standby node). If
software determines that the island with the standby CPM-IMM is the island with
the greater number of nodes, the standby node takes the role of active CPM-
IMM and that island continues operations. The nodes in the other island all
reboot.
• If both islands have the same number of nodes, the node that was the standby
CPM-IMM node before the failure occurred becomes the active CPM-IMM. All
the nodes in the island with the previously active CPM-IMM node (that is, active
before the failure) will reboot. While rebooting, if the CPM-IMM node is unable
to contact the current active node in boot.tim, they will reboot again. The IMM-
only node will reboot and wait to hear from the active CPM (basically, it will wait
for the operator to fix the problem and join the islands).
Use subject to Terms available at: www.nokia.com
7210 SAS-M, T, R6, R12, Mxp, Sx, S Basic System
© 2021 Nokia.
Configuration Guide
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