The FortiGate-7121F chassis includes two System Management Modules (SMMs) or shelf managers, located at the top of the chassis front panel. The SMMs are factory installed and configured and are not field replaceable.
The SMMs operate in an active-passive redundant configuration. By default, when the system starts up the SMM in slot M2 is active and the SMM in slot M1 is passive. The active SMM always has IPMB address 0x20 and the passive SMM always has IPMB address 0x22. Active and passive refers to the SMM that is controlling the chassis. The MGMT interfaces and console ports on both SMMs are always available if the SMM is operating.
If the passive SMM fails, the chassis just keeps operating with the active SMM. If the active SMM fails, the passive SMM becomes active.
The active SMM synchronizes the following data to the passive SMM:
- Chassis state and chassis policy
- LAN parameters for each LAN channel, including, the IP address, gateway IP address, channel enable status, local interface/non-local interface setting, and the session support flag.
The active SMM includes LED indicators that report on the status of many of the chassis components, including fan trays and power supplies. You can also use the SMM console ports to connect to the SMM CLI and to the CLI of the modules in chassis slots 1 to 12.
Each module in the chassis includes its own module Shelf Manager Controller (SMC) Serial Debug Interface (SDI) or SMC SDI console that communicates with the SMM SMC SDI. You can connect a serial cable to the