TMS zl Management and Configuration Guide ST.1.1.100226

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Troubleshooting
Troubleshooting the TMS zl Module in Routing Mode
If the modules in the cluster are in different switches, you should also
ensure that the HA VLAN and all TMS VLANs are configured on both
switches.
Figure 10-24. Sample HA Configuration
■ The master is down, but a failover does not occur.
Check the following:
• Ensure that the ports that connect the host switches are tagged
members of the HA VLAN.
• If the cluster members are in two different switches, ensure that the
same TMS VLANs are configured on both host switches.
• Determine if a device between the two switch chassis failed. To
eliminate this source of failure, do not place devices between two
switch chassis that contain the cluster members.
■ An HA failover occurred, and the participant became the master.
When the master came online again, it became the participant.
This is the expected behavior of an HA cluster. If you want the new partici-
pant to once again be the master, you must reboot the current master so the
cluster members’ roles will change once again. It is recommended that such
a reboot take place during off hours to minimize the impact on the network.