
Chapter 1 XSCF Overview 1-17
Note – The serial port is used by maintenance engineers.
Note – The two XSCF-LAN ports are used for the same purpose (alternate path
configuration). For details on these connections, see Chapter 3.
Caution – IMPORTANT - The IP address of XSCF-LAN#0 and the IP address of
XSCF-LAN#1 must be specified in different subnet addresses.
XSCF-LAN Redundancy
In the M3000/M4000/M5000/M8000/M9000 servers, the XSCF-LAN paths can be made
redundant (duplicated). If a LAN failure occurs, it contributes significantly to reducing
system availability. However, in a system equipped with a duplicate LAN, the routes (paths)
in the remaining network can be used even if one subnetwork is faulty. In this way, high
system availability can be achieved.
FIGURE 1-5 and FIGURE 1-6 show the network, which belongs to one or two different subnets.
In
FIGURE 1-5 and FIGURE 1-6, the ordinary lines represent subnetwork connections and the
thick lines represent network connections.
FIGURE 1-5 shows configurations with a single mounted XSCF Unit: one where the LAN is
not redundant, and the other with a redundant LAN.
TABLE 1-3 XSCF-LAN Operation Examples 2
LAN Name Operation
XSCF-LAN#0 port • For system administrator operation
• For remote maintenance service operation
XSCF-LAN#1 port Not used
TABLE 1-4 XSCF-LAN Operation Examples 3
LAN Name Operation
XSCF-LAN#0 port • For system administrator operation
• For maintenance operation
• For remote maintenance service operation
XSCF-LAN#1 port Same as above
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