Brocade Virtual ADX Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 333)

Brocade Virtual ADX Server Load Balancing Guide 317
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Configuring additional HA parameters
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To enable this feature, enter the following command.
Virtual ADX(config)#server backup-vip-cnt
Syntax: [no] server backup-vip-count
Configuring failover based on the number of active virtual ports
You can configure the HA peer to fail over based on router ports and active virtual ports, instead of
just the router ports (default) or the combination of router ports and virtual servers as described in
“Configuring failover based on active VIP count” . When a failover is configured to be based on the
number of active virtual ports, the following occurs:
• If neither of the two nodes in the peer has any router ports, the one having more active
VIP/VPORT counts will be the active node; no status change if the number active VIP/VPORT
counts ties.
• If one node has no router ports, but another has at least one router port, the latter will be the
active node.
• If both nodes have at least one router port, the one having more active VIP/VPORT counts will
be the active node. If the number of active VIP/VPORT counts tie, the node with more router
ports will be the active node. There is no status change if the number of both active virtual
ports and router ports tie.
To enable this feature, enter the following command.
Virtual ADX(config)#server backup-vport-cnt
Syntax: [no] server backup-vport-cnt
This feature can be configured with or without the server backup-vip-cnt command as described:
• If the server backup-vip-cnt command is not configured, only the number of active virtual ports
is compared. The node with more active virtual ports will be considered to have more
VIP/VPORT counts, and a tie is called if they have an equal number of active virtual ports.
• If both the server backup-vip-cnt and server backup-vport-cnt commands are configured, the
number of active virtual ports will have a higher precedence than the number of active virtual
servers. Consequently, the node with a larger number of virtual ports will always be considered
as having a higher VIP/VPORT count and in the case of a tie on the active virtual port count,
the node with a larger number of active virtual servers will be considered as having a higher
VIP/VPORT count. A tie condition occurs where both nodes have an equal number of both
virtual servers and virtual ports.
NOTE
The server backup-vport-cnt command must be configured on both Brocade Virtual ADX devices in
the pair. To avoid an unnecessary failover during configuration, we suggest that you enable this
feature on the active ADX device first. Also, the feature should be disabled on the standby ADX
device first.