ServerNet Cluster Manual

Installing and Configuring a ServerNet Cluster
ServerNet Cluster Manual—520575-003
3-30
Installing a ServerNet Cluster Using the Tri-Star
To p ol ogy
Installing a ServerNet Cluster Using the
Tri-Star Topology
A ServerNet cluster using a tri-star topology has three cluster switches per fabric and
can support up to 24 nodes.
You construct a tri-star topology by installing the three star groups of the tri-star as
independent clusters and then connecting the clusters using the Add Switch guided
procedure. Each of the three star groups uses one switch per fabric and supports up to
eight nodes. Each star group is a valid subset of the tri-star topology and can operate
independently of the other star groups if necessary.
Table 3-9 lists the tasks for installing a ServerNet cluster using a tri-star topology.
Task 1: Decide Which Nodes Will Occupy the Three Star Groups
of the Tri-Star Topology
Each star group of the tri-star topology can support up to eight nodes. Use the
following form to plan which nodes will belong to each star group.
Note. The tri-star topology (three cluster switches per fabric) requires that all nodes run the
G06.14 version of the operating system or G06.13 with the Release 3 SPRs listed in Table 3-5
on page 3-15. This is required because versions of the operating system earlier than G06.13
do not support the tri-star topology. In addition, the cluster switches must be loaded with the
T0569AAE firmware and configuration.
Table 3-9. Task Summary for Installing a ServerNet Cluster Using a Tri-Star
Topology
√ Description Page
Task 1: Decide Which Nodes Will Occupy the Three Star Groups of the Tri-Star
Topology
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Task 2: Route the Fiber-Optic Cables for the Two-Lane Links 3-32
Task 3: Install the Three Star Groups of the Tri-Star Topology 3-32
Task 4: Use the Guided Procedure to Prepare to Merge the Clusters 3-32
Task 5: Configure and Start Expand-Over-ServerNet Lines 3-35
Task 6: Verify Operation of the Cluster Switches 3-35
Task 7: Verify Cluster Connectivity 3-36
Note. If the lengths of the two-lane links between the cluster switches are more than 1
kilometer, all nodes in the cluster must meet the requirements for cables up to 5 kilometers in
Ta ble 2 -4
on page 2-11.