Brocade Virtual ADX Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 59)

Brocade Virtual ADX Server Load Balancing Guide 43
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Application port grouping
2
Enabling a concurrent port
The concurrent feature allows a client to have sessions on different application ports on the same
real server at the same time. When you enable an application port to be concurrent, the real server
can open additional (“concurrent”) TCP or UDP sessions with the client using arbitrary TCP or UDP
port numbers.
Although the concurrent connections attribute is similar to application groups, application groups
apply to specific TCP or UDP ports that you configure on the virtual server.
NOTE
For servers that use passive FTP in a DSR configuration, configure the FTP ports to be both sticky
and concurrent.
To enable an application port to be concurrent, enter commands such as the following.
Virtual ADX(config)#server virtual-name-or-ip v1 10.157.22.1
Virtual ADX(config-vs-v1)#port 80 concurrent
Syntax: [no] port tcp/udp-port concurrent
Application port grouping
The track port and track port group methods of TCP/UDP application grouping are similar. In both
configurations, the Brocade Virtual ADX sends all client requests for ports within a specific set of
application ports to the same real server. The two methods differ in the following way:
• In a track port configuration, the tracking applies only to the primary port, which is the first port
in the list of track ports. If the client requests one of the other applications (one of the
applications that is tracking the primary application) first, Brocade Virtual ADX tracking does
not apply.
• In a track port group configuration, the Brocade Virtual ADX sends client requests for
applications within a group to the same real server regardless of which application the client
requests first.
The track and track-group commands for a port are mutually exclusive.