ServerNet Cluster Manual

Upgrading a ServerNet Cluster
ServerNet Cluster Manual—520575-003
4-89
Fallback for Merging Clusters to Create a Tri-Star
To p ol ogy
Fallback for Merging Clusters to Create a
Tri-Star Topology
Use one of the following procedures to fall back from merging clusters to create a tri-
star topology:
•
Fallback for Merging Three Star Topologies to Create a Tri-Star Topology on
page 4-89
•
Fallback for Merging a Split-Star Topology and a Star Topology to Create a Tri-Star
Topology on page 4-89
Fallback for Merging Three Star Topologies to Create a Tri-Star
Topology
This procedure:
•
Starts with a tri-star topology using three cluster switches per fabric
•
Aborts Expand lines between the three star groups of the cluster to prepare for
splitting the tri-star topology. (A star group consists of an X and a Y switch and up
to eight connected ServerNet nodes.)
•
Disconnects the two-lane links to split the three star groups of the tri-star topology
1. Use the steps in Splitting a Large Cluster Into Multiple Smaller Clusters on
page 6-11 to disconnect the two-lane links between the three star groups of the
cluster.
2. If necessary, refer to Fallback for Upgrading Software to Obtain G06.14
Functionality on page 4-50.
Fallback for Merging a Split-Star Topology and a Star Topology
to Create a Tri-Star Topology
This procedure:
•
Starts with a tri-star topology using three cluster switches per fabric.
•
Aborts Expand lines for one star group of the cluster to prepare for leaving the tri-
star topology. (A star group consists of an X and a Y switch and up to eight
connected ServerNet nodes.)
•
Downloads a split-star configuration one fabric at a time to the cluster switches in
the other two star groups. For clusters using two cluster switches per fabric, the
Note. Unless your applications require it, you do not need to fall back to an earlier RVU on
individual nodes. HP recommends using the T0569AAE or superseding firmware unless
fallback is unavoidable. Each cluster can function independently as a subset of the tri-star
topology. Cluster switches can be added online.