Re-Enabling Failover After Disabling - Coyote Point Systems E350GX Installation And Administration Manual

Chapter 5: Configuring Equalizer Operation
try to assume primary role and continously reboot. For this reason, you can disable failover on both systems as
shown below.
Note that, as soon as you disable failover on one failover peer, both peers will go into
on the screen). Both peers will attempt to assume the IP addresses of all the clusters in their
Help > About
configuration files, and you will see messages like the following on both Equalizer consoles:
eq350gx-235 /kernel: arp: 00:1d:7d:7b:05:62 is using my IP address 172.16.0.82!
For this reason, if your Equalizers are actively serving cluster traffic, you should shut down one of the Equalizers
until you are ready to re-enable failover.
Caution – If you are going to re-establish failover between the two systems on which you have disabled failover,
it is important that you only update the configuration file on one of the systems while failover is Disabled. Updating
the cluster configuration will increase the sequence number of the configuration file. When failover is re-
established, the system with the highest configuration file is transferred to the other Equalizer during the first
synchronization betwen the systems. See the section, "Re-enabling Failover After Disabling" on page 100.
To temporarily disable the failover configuration without deleting the failover settings, do the following:
1. On one of the Equalizers, click on the other Equalizer's peer name at the top of the left frame tree.
2. Check the
Disable Failover
3. Click .
commit
4. Perform Steps 1 through 3 on the other Equalizer.
5. Shut down one of the Equalizers. Open that Equalizer's Administrative Interface, click on its peer name in the
left frame tree, and open the

Re-enabling Failover After Disabling

If you are re-enabling failover between two Equalizers that previously were enabled in the same failover pair and
failover was disabled as desccribed in the section "Disabling the Failover Configuration". If you have not shut down
one of the Equalizers as recommended in that section, it is possible that configuration file updates have been made
on one or both of them.
Each time a configuration change is made, the sequence number in the configuration file is updated. When failover
is established, the configuration file with the highest sequence number is transferred to the other during the first
synchronization between the units (unless the
tab). For this reason, check the sequence number on both systems before re-enabling failover between two running
systems.
1. If both Equalizers are running, check the sequence number on both systems. To do this click the
the top bar of the Administrative Interface and select
box to expand it and show the sequence number.
The configuration file with the highest sequence number will be transferred to the other when failover is
established. See the section "Updating the Configuration File Sequence Number" on page 312 if you need to
edit the sequence number to preserve the configuration you require.
2. Do the following on the currently running Equalizer, or the Equalizer with the highest configuration file
number:
a. Click on the other Equalizer's peer name at the top of the left frame tree.
b. Uncheck the
Disable Failover
c. Click .
commit
100
check box in the right frame.
tab. Click on the
Maintenance
dont transfer
About
check box.
standalone mode
button.
shutdown
option is enabled on the
Failover > Synchronization
from the menu. Point at the
Equalizer Installation and Administration Guide
(as shone
icon on
Help
System Information