Coyote Point Systems Equalizer Especificaciones descargar pdf (Pagina 466)

100

101

Failover

Also shown in the output are the preferred peer and VID (VLAN ID) settings. Basic troubleshooting for failover

includes verifying that all preferred peer and VID settings on clusters are correct.

Rebalancing

Rebalancing is usually done after a failover event occurs and all system have been returned to normal service.

This instantiates each cluster (and its required objects, such as servers) on the peer set in the cluster’s

preferred_peer parameter. In the example configurations that follow, the clusters clA and clB will

continue to run on Eq-A until you run this command on Eq-A:

eqcli > rebalance

This instantiates each cluster on the preferred peer set in its configuration. In this case, cluster clB will migrate

from Eq-A to run on Eq-B (its preferred peer) instead. The clusters will continue to run on their preferred peers until

a failover event occurs.

After rebalancing, the F/O Mode displayed for Eq-A and Eq-B should be Mixed. This indicates that it is acting

as the primary system for some clusters and as backup for others.

Configuring N + 1 Failover with 3 Equalizers (CLI)

In this configuration, three Equalizers (Eq-A, Eq-B, and Eq-C) cooperate to provide high availability. They do not

need to be the same models, and can include

Equalizer OnDemand

. They are configured with:

l 2 VLAN subnets

l 2 clusters -- 1 preferred on each of EQ-A and EQ-B, no clusters on Eq-C

l 2 failover groups

1. Do the following on all three Equalizers:

a. Create all VLANs and subnets necessary for your configuration (see "Configuring VLANs" on

page 100). For this example, we assume two VLANs: vlan2 with two and vlan3) with one or

two subnetsubnet each (172net and 192net, respectively), and that these are cable-

connected to Equalizer through separate front-panel ports. As with any failover configuration,

the VLAN/subnet configuration on all peers must be exactly the same, except for object

names and tagged/untagged port assignments.

b. Set the Failover (or Virtual) IP address on each VLAN subnet, as in these examples:

eqcli > vlan vlan2 subnet 172net virt_addr 172.16.0.169/21

eqcli > vlan vlan3 subnet 192net virt_addr 192.168.0.169/21

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