HP Tc4100 - Server - 256 MB RAM Configuration Manual page 19

Figure 1 Recommended Configuration with Three Data Centers
Clients
connections
DWDM
Network
Network
Switch
Switch
Node Node
A B
FC
Hub/Switch
FC
Hub/Switch
XP Disk
Primary Data Center 1
Array
In the example above, the DWDM boxes connected between the two Primary Data Centers are configured
with multiple dark fibre links. The DWDM links are used for both networking and CA data replication. If
the DWDM box is fault tolerant, only one is required in each data center. If it's not fault tolerant, two are
required in each data center. The Quorum Server site distance can be up to 100 kilometers away from
either Primary Data Center since DWDM links are also used. It is also supported to connect to the
Arbtitrator data center without DWDM links, as long as the distance is within the allowed specifications for
the network type being used.
Clients
QS
connections
Network Network
Switch
Switch
DWDM
DWDM
Dedicated
Heartbeat
link
Network
Switch
Cluster Heartbeat,
Client network,
CA connections
M
DWD
Redundant DWDM
Links, routed
differently
Maximum distance 100 kilometers
Channel
Bonding
Clients
connections
Third Site
Clients
Dedicated
connections
Heartbeat
link
Network
Switch
DWDM
Hub/Switch
Primary Data Center 2
DWDM
Network
Network
Switch
Switch
Node Node
D
C
FC
FC
Hub/Switch
XP Disk
Array