hp mc/serviceguard for Linux configuration guide for HP Netservers

Figure 1 Recommended Configuration with Three Data Centers
N
ode
A
N
ode
B
N
ode
D
N
ode
C
FC
Hub/Switc
h
FC
Hub/Switc
h
FC
Hub/Switc
h
FC
Hub/Switc
h
N
etwork
Switch
N
etwork
Switch
XP Disk
Array
XP Dis
k
Array
DWD M
DWDM
Maximum distance 100 kilometers
Primary Data Center 1 Primary Data Center 2
Cluster Heartbeat,
Client network,
CA connections
Redundant DWDM
Links, routed
differently
QS
Third Site
N
etwork
Switch
N
etwork
Switch
N
etwork
Switch
N
etwork
Switch
DWDM
DWDM
DWDM
DWDM
Channel
Bonding
Clients
connections
Clients
connections
Clients
connections
Clients
connections
N
etwork
Switch
N
etwork
Switch
Dedicated
Heartbeat
link
Dedicated
Heartbeat
link
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.