ServerNet Cluster 6780 Planning and Installation Guide (G06.24+, H06.03+)

ServerNet Cluster Overview
ServerNet Cluster 6780 Planning and Installation Guide—527301-004
1-5
Layered Topology
Cluster Switch Zone
A cluster switch zone consists of a pair of X and Y switch groups and the ServerNet
nodes connected to them. A ServerNet cluster with the layered topology can consist of
up to three zones. The fiber-optic cables between zones connect between switches in
different zones of the same fabric. For example, switch X11 sends traffic from
ServerNet nodes 1 through 8 across the zones to switch X21 for routing to ServerNet
nodes 9 though 16. Traffic travels in both directions across the zones.
Cluster Switch Group
A cluster switch group consists of one to four 6780 switches. Each 6780 switch is a
switch layer. Two or more switches in a group are connected by fiber-optic cables
between the layers. Each group consists of up to four layers in the same zone and the
same external ServerNet fabric. For more information about identifying switch groups,
refer to 6780 Group Number on page 2-4
Although not required, the 6780 switches in a group are usually located in the same
rack. You can also have two groups in the same rack. HP recommends that groups in
the same rack be of the same fabric.
Cluster Switch Layer
Within a cluster switch group, each layer represents one 6780 switch that provides
connections for up to eight ServerNet nodes. Each layer is numbered one through four
from bottom to top.
Figure 1-1. Layered Topology (Two Zones and Two Layers)
Note. All groups must have the same number of layers.
Nodes
17-24
Switch Group 2 (Y)Switch Group (Y)
Nodes
1-8
Nodes
25-32
Nodes
9-16
Switch Zone 1 Switch Zone 2
6780 Switch
Layer 2 (X12)
6780 Switch
Layer 1 (X11)
Switch Group (X)
6780 Switch
Layer 2 (X22)
6780 Switch
Layer 1 (X21)
Switch Group 2 (X)
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