Silicon Graphics ICE X, User Manual

Page: 41 / 142

Chassis Controller Interaction
007-5806-004 21
Note that the non-redundant example (shown in Figure 2-3) is a non-standard chassis management
configuration with only a single virtual local area network (VLAN) connect line from each CMC
to the internal LAN switch. See also “Multiple Chassis Manager Connections” in Chapter 3.
LAN1 LAN2 BMC
LAN1 LAN2 BMC
CMC-0
CMC-1
CMC-2
CMC-3
CMC-0
CMC-1
CMC-2
CMC-3
48-port
GigE switch
Rack 001 and 002 RLC
VLAN
Customer
LAN
System admin node
Service node
LAN1 LAN2 BMC
Rack 001 Rack 002
VLAN
Figure 2-3 Non-redundant Chassis Manager Interconnection Diagram Example
M-rack Chassis Manager Interconnection
The interconnection of an M-Cell’s rack environment is somewhat more complex than a D-rack
and requires the use of a third VLAN (VLAN3) within the Gigabit Ethernet switch network.
This VLAN3 interface allows the CMCs to monitor and adjust the activity of the cooling racks in
an M-cell as well as the external cooling distribution unit (CDU). The CDU rack supplies cooling
to the individual blades within the M-rack.
Figure 2-4 on page 22 shows a block diagram example of the interconnection scheme for an
M-Cell rack.