Specifications

96 ExtremeWare XOS 10.1 Concepts Guide
Status Monitoring and Statistics
To view the current temperature of the fan trays, use the following command:
show fans {detail}
The following sample output displays the temperature information:
FanTray 1 information:
...
Temperature: 25.1 deg C
...
System Health Checking
The system health checker tests the backplane, the CPU, and I/O modules by periodically forwarding
packets and checking for the validity of the forwarded packets.
To enable the system health checker, use the following command:
enable sys-health-check slot <slot>
To disable the system health checker, use the following command:
disable sys-health-check slot <slot>
To configure the how often packets are forwarded, use the following command:
configure sys-health-check interval <interval>
System Redundancy
If you install two MSMs in the chassis, one assumes the role of primary (master) and the other assumes
the role of standby (backup). The primary MSM provides all of the switch management functions
including bringing up and programming the I/O modules, running the bridging and routing protocols,
and configuring the switch. The primary also keeps in sync with the standby MSM in case the standby
needs to take over the primary role if the primary fails.
Table 17 describes the terms associated with system redundancy.
Table 17: System redundancy terms
Term Description
Node A node is a CPU that runs the XOS management applications on the switch. Each MSM
installed in the chassis is a node.
Node Manager The Node Manager is a process that performs leader election between multiple nodes in the
system. In simple terms, the Node Manager elects the primary and backup MSMs. If there is
only one MSM installed, that MSM becomes the primary MSM.
To determine the primary node, the Node Manager sends hello messages to all of the nodes
in the system, computes the health of the system, and checks the parameters of each node
(for example the node state, configuration, priority, etc.).