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Intel
®
NetStructure
TM
ZT 7102 Chassis Management Module
CMM Redundancy, Synchronization and Failover
40 Technical Product Specification
Warning: The /.rhosts file is used for synchronization and should NEVER be modified.
4.3.1 Synchronization Requirements
For synchronization to occur:
• The CMMs must be able to communicate with each other over their dedicated IPMB. The
CMMs use a heartbeat via their dedicated IPMB to determine if they can communicate with
each other over IPMB.
• An Ethernet connection must exist between the two CMMs. The CMMs must be able to ping
each other via Ethernet for synchronization to be successful. This can be a connection through
the Ethernet switches in the chassis, which requires both switches to be present in the chassis.
A connection can occur through an external Ethernet switch connected to the front ports of the
CMM pair, or alternatively, the connection can be a crossover cable connecting the two front
ports of the CMM pair. If synchronization fails on Eth1, it will be attempted on Eth0. If the
CMMs cannot successfully ping each other via Eth0 or Eth1, synchronization cannot occur.
A failure of synchronization to occur will result in a health event being logged in the chassis SEL,
however this will not inhibit a failover from occurring.
Table 19. CMM Synchronization
File(s) or data Description Path:
/etc/cmm.cfg CMM’s main configuration file Ethernet
/etc/passwd Password file Ethernet
/etc/shadow Password file Ethernet
/etc/cmm/sel_* All SEL files except the CMM SEL files Ethernet
/etc/cmm/*.bin All SDR Files Ethernet
/etc/cmm/*.sif All SIF Files Ethernet
/etc/cmm/DroneList.cfg Drone mode compatible forms Ethernet
/etc/cmm/PWMMap.cfg PWM Fanspeed Mapping Ethernet
/etc/cmm/SlotLayout.cfg Chassis slot layout configuration Ethernet
/etc/var/snmpd.conf SNMP configuration files Ethernet
/etc/snmpd.conf SNMP configuration files Ethernet
/home/scripts Entire user scripts area Ethernet
date and time Date and time IPMB
IP Address Settings CMM eth1, eth1:1, and eth0 IP address settings IPMB
Blade power states Status of blade power states IPMB
Power Supply Inhibit States Status of power supplies that are inhibited by the CMM IPMB