Figure 1-5 Xscf-Lan Redundancy (In Entry-Level And Midrange Servers) - Sun Microsystems Sun SPARC Enterprise M3000 User Manual

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
subnets. In
connections and the thick lines represent network connections.
FIGURE 1-5
LAN is not redundant, and the other with a redundant LAN.
XSCF-LAN Redundancy (In Entry-level and Midrange Servers)
FIGURE 1-5
a) No redundant LAN
Failure of
path or XSCF
XSCF
System
In the configuration examples shown in
and the XSCF Unit is in a redundant configuration.
In the configuration with a single XSCF Unit, XSCF-LAN cannot be used by any
XSCF Unit failure even if the XSCF-LANs are redundant (duplicated). If one
subnetwork is faulty, the remaining path can be used (
XSCF Unit is faulty, XSCF initiates failover (
availability can be achieved.
1-18 SPARC Enterprise Mx000 Servers XSCF User's Guide • August 2009
and show the network, which belongs to one or two different
FIGURE 1-6
and
FIGURE 1-5 FIGURE 1-6
shows configurations with a single mounted XSCF Unit: one where the
, the ordinary lines represent subnetwork
b) Redundant LAN
Failure of a path
XSCF
System
, the XSCF-LANs are redundant
FIGURE 1-6
FIGURE 1-6
-d). Therefore, high network
FIGURE 1-6
-c). If the active