Brocade Virtual ADX Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 60)

44 Brocade Virtual ADX Server Load Balancing Guide
53-1003247-01
Application port grouping
2
Tracking primary ports
You can configure the Brocade Virtual ADX to send all client requests for a specific set of TCP or
UDP ports to the same real server as a “primary” TCP or UDP port grouped with the other ports.
The primary TCP or UDP port can be grouped with up to four additional TCP or UDP ports. Once the
Brocade Virtual ADX sends a client request for the primary port to a real server, all subsequent
requests from the client for ports grouped with the primary port go to the same real server. For a
configuration example and more information, refer to
“TCP/UDP application groups configuration
example” on page 47.
Note that if any primary port is down for a real server, any track ports on that real server are not
considered for load balancing.
NOTE
You must configure all the grouped ports to be “sticky” and bind them to all real servers involved.
NOTE
If a client requests one of the ports that follows the primary port before requesting the primary port
itself, the Brocade Virtual ADX does not make the connection sticky. Only after the client requests
the primary port does the Brocade Virtual ADX make subsequent requests from the client for that
port or ports that track the primary port sticky.
NOTE
For servers that use passive FTP in a DSR configuration, configure the FTP ports to be both sticky
and concurrent.
To configure a TCP or UDP application group, enter the following commands.
Virtual ADX(config)#server virtual-name-or-ip v1 10.157.22.1
Virtual ADX(config-vs-v1)#port 80 sticky
Virtual ADX(config-vs-v1)#port 23 sticky
Virtual ADX(config-vs-v1)#port 69 sticky
Virtual ADX(config-vs-v1)#track 80 23 69
Virtual ADX(config-vs-v1)#bind 80 r1 80 r2 80
Virtual ADX(config-vs-v1)#bind 23 r1 23 r2 23
Virtual ADX(config-vs-v1)#bind 69 r1 69 r2 69
These commands configure HTTP (port 80), Telnet (port 23), and TFTP (port 69) to
be sticky.
Syntax: [no] track primary-port TCP/UDP-port [TCP/UDP-port [TCP/UDP-port [TCP/UDP-port]]]
Track port group function
In a track port group, the Brocade Virtual ADX sends client requests for applications within a group
of ports to the same real server, regardless of which application the client requests first.
Up to eight ports can be grouped together using the track port group function. However, a port can
be part of only one track port group. For a configuration example and more information, refer to
“TCP/UDP application groups configuration example” on page 47.
Note that if any service port is down for a real server, the track port groups on that real server are
not considered for load balancing.