ServerNet Cluster Manual

Upgrading a ServerNet Cluster
ServerNet Cluster Manual—520575-003
4-91
Fallback for Merging a Split-Star Topology and a Star
Topology to Create a Tri-Star Topology
c. In the Available Actions box, select Configuration Update, and click Perform
action. The Update Switch guided procedure is launched
d. In the Guided Procedure - Update Switch window, click Start. The
Configuration Update dialog box appears.
e. In the Topology box, click the radio button to select the Split-Star topology.
f. In the Configuration tag field, select one of the following configuration tags:
•
Max 16 nodes, nodes 1-8 (0x10000)
•
Max 16 nodes, nodes 9-16 (0x10001)
g. Click Perform action.
4. Repeat Step 3 on the X-fabric cluster switch for the other star groups that will make
up the split-star topology, but select a different configuration tag.
5. On all X-fabric cluster switches in the tri-star topology, disconnect the two-lane
links (the switch-to-switch cables connected to ports 8 through 11). Do not
disconnect the two-lane links for the Y-fabric cluster switches.
6. Connect the four-lane links between the X-fabric cluster switches that will be used
for the split-star topology. (These are the cluster switches whose configuration tags
you changed in Step 3 and Step 4.) For more information, refer to Connecting the
Four-Lane Links on page 4-64.
7. Wait 4 to 5 minutes for the X fabric to come up, and then verify that the fabric is
operational:
a. Use SCF to check for connectivity problems:
>SCF STATUS SUBNET $ZZSCL, PROBLEMS
b. If problems are indicated on a node, use SCF on that node to gather more
information:
>SCF STATUS SUBNET $ZZSCL
c. Use SCF to verify that ports 8 through 11 are enabled.
>SCF STATUS SWITCH $ZZSMN
In the Switch Port Status section of the display, the TP (Target Port Enabled)
column should show the value EN (Enabled) for ports 8 through 11.
d. Use the TSM Service Application to check for alarms on the X fabric. If you see
alarms, wait for several minutes to see if the alarms clear automatically.
8. When you have confirmed that the X fabric is operational, repeat Step 3 on one of
the Y-fabric cluster switches that will be used for the split-star topology. You must
change the configuration tags to support the split-star topology.
Note. The configuration update disrupts ServerNet communication through the switch
temporarily, but the external ServerNet Y fabric is still functional.