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NetStructure
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ZT 7102 Chassis Management Module
Software Specifications
38 Technical Product Specification
In a platform containing redundant CMMs, upon initial power up, both CMMs will have identical
IP addresses on all of their Ethernet interfaces. The standby CMM will automatically decrement its
IP address on Eth1 by 1 so that synchronization can occur; however, the user must change these IP
addresses upon initial login so that an address conflict does NOT occur and synchronization and
failover can operate correctly. See Section 7.3.1, “Setting IP Address Properties” on page 54 for
further information and instructions on changing the IP addresses. See Section 4.0, “CMM
Redundancy, Synchronization and Failover” on page 39 for further information regarding
synchronization, failover, and redundancy.
3.6 Sensor Event Logs (SEL)
The chassis management module utilizes a dual domain for hosting the sensor event logs (SEL) of
the chassis components and boards used in the platform. With the dual domain architecture, some
SEL files are stored locally on the CMM in /etc/cmm, and some SEL files are stored on the
individual blades.
For the CMM, backplane, and chassis components, the CMM stores the SELs locally on the CMM
in /etc/cmm.
3.6.1 CMM SEL Architecture
The SEL files stored locally on the CMM in /etc/cmm have a maximum size of 8 Kbytes. If a SEL
becomes full, the CMM will wrap the SEL to the beginning, and all previous SEL entries will be
cleared.
3.6.2 Satellite Management Controller (SMC) Boards
For a board inserted into the platform acting as a satellite management controller (SMC), the CMM
will also store the SEL file locally. Some SMC-based boards may also contain their own SEL.
Health events generated from SMC-based boards will be stored in the SEL on the CMM as well as
on the SMC board if a SEL exists. When the command is issued to get the SEL from an
SMC-based board, the CMM will always retrieve the SEL file stored locally on the CMM in
/etc/cmm.
3.6.3 Baseboard Management Controller (BMC) Boards
For boards inserted into the system acting as a baseboard management controller (BMC), the SEL
file will be stored on that particular board. All health events will be logged in the SEL on that
board. When the command is issued to get the SEL from the board, the CMM will retrieve the
entire SEL via IPMB from that board.
3.6.4 Retrieving a SEL
The CLI can be used to retrieve the SEL for a location. To retrieve the SEL for a particular
location, issue the following get command:
cmmget -l [location] -d SEL
Where location is the component you wish to retrieve the SEL for (cmm, chassis, bladeN).