Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 49)

Installing redundant network adapters provides your cluster with a failover connection to the public network. If the primary
network adapter or a switch port fails, your cluster will be able to access the public network through the secondary network
adapter until the faulty network adapter or switch port is repaired.
Using Dual-Port Network Adapters for Your Private Network
You can configure your cluster to use the public network as a failover for private network communications. However, if dual-
port network adapters are used, the two ports should not be used simultaneously to support both the public and private
networks.
Cabling Your Private Network
The private network connection to the cluster nodes is provided by a second or subsequent network adapter that is installed
in each node. This network is used for intracluster communications. Table 3-3 lists the required hardware components and
connection method for three possible private network configurations.
Table 3-3. Private Network Hardware Components and Connections
Method Hardware Components Connection
Network switch Fast Ethernet or Gigabit Ethernet
network adapters and switches
Connect standard Ethernet cables from the network adapters in both
cluster nodes to a Fast Ethernet or Gigabit Ethernet switch.
Point-to-Point
Fast Ethernet
Fast Ethernet network adapters Connect a crossover Ethernet cable between the Fast Ethernet
network adapters in both cluster nodes.
Point-to-Point
Gigabit Ethernet
Copper Gigabit Ethernet network
adapters
Connect a standard Ethernet cable between the Gigabit Ethernet
network adapters in both cluster nodes.
Cabling the Mouse, Keyboard, and Monitor
If you are installing a NAS SCSI cluster configuration in a Dell rack, your cluster will require a switch box to enable the
mouse, keyboard, and monitor for your cluster nodes.
See your rack installation documentation included with your rack for instructions on cabling each cluster node's KVM to the
mouse/keyboard/monitor switch box in the rack.
Power Cabling the NAS SCSI Cluster Solution
Observe the following cautions when connecting the power cables to the NAS SCSI cluster solution.
CAUTION: Although each component of the NAS SCSI cluster meets leakage current safety requirements,
the total leakage current may exceed the maximum that is permitted when the components are used
together. To meet safety requirements in the Americas (that is, the United States, Canada, and Latin
America), you must use a Type B plug and socket connection for the cluster power to enable the
appropriate level of ground protection. In Europe, you must use one or two power distribution units
(PDUs) or two Type B plug-and- socket connections wired and installed by a qualified electrician in
accordance with the local wiring regulations.
CAUTION: Do not attempt to cable the NAS SCSI cluster to electrical power without first planning the
distribution of the cluster's electrical load across available circuits. For operation in the Americas, the NAS
SCSI cluster requires two AC circuits with a minimum capacity of 20 amperes (A) each to handle the
electrical load of the system. Do not allow the electrical load of the system to exceed 16 A on either