Brocade Virtual ADX Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 143)

Brocade Virtual ADX Server Load Balancing Guide 127
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Miscellaneous options
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NOTE
Where VIP hosts are classified as healthy, the Brocade Virtual ADX injects static host/subnet routes.
If a VIP is found to be unhealthy, RHI withdraws the static host/subnet route but the feature remains
enabled. Using the no server global-advertise-vip-route command (IPv4 and IPv6) disables RHI and
causes all routes that were injected by RHI because of the global-advertise command to be
withdrawn. Routes injected by local advertise will still be in effect and will override the global
advertise setting.
To enable VIP RHI for an individual virtual server, enter commands such as the following.
Virtual ADX(config)#server virtual-name-or-ip vs1
Virtual ADX(config-vs-vs1#advertise-vip-route
Syntax: [no] advertise-vip-route
NOTE
Where VIP hosts are classified as healthy, the Brocade Virtual ADX injects a static host/subnet
routes only for the VIP specified by the advertise-vip-route command. If a VIP is found to be
unhealthy, RHI withdraws the static host/subnet route for the host of the configured VIP but the
feature remains enabled. Using the no advertise-vip-route command causes any routes for this VIP
host injected by RHI to be withdrawn.
To disable VIP RHI for an individual virtual server, enter commands such as the following.
Virtual ADX(config)#server virtual-name-or-ip vs1
Virtual ADX(config-vs-vs1#disable-advertise-vip-route
Virtual ADX(config-vs-vs1)#end
Syntax: [no] disable-advertise-vip-route
This command is useful if you need to enable VIP RHI globally and disable it for a few virtual
servers.
NOTE
Due to certain design restrictions, we advise that users turn off the RHI feature before modifying an
interface configuration (on the interface to which the VIP is attached). After changes have been
made to the interface configuration, you can turn the RHI feature on again. Following this method
allows new VIP static routes to be recomputed and advertised while the old VIP routes are
withdrawn. Use the Global and Local VIP advertise commands to turn the RHI on and off.
Defining the health of a VIP port
There are two options for defining VIP port health:
• By default, a VIP port will be considered healthy as long as there is at least one healthy real
server port bound to it.
• You can define the percentage of bound real server ports that must be healthy in order to
consider the VIP port healthy.
When you define the percentage of bound real server ports that must be healthy in order to
consider the VIP port healthy, you can define this setting globally or per-VIP.