Brocade Virtual ADX Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 166)

150 Brocade Virtual ADX Server Load Balancing Guide
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Application-specific SLB considerations
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Application-specific SLB considerations
RTSP server load balancing
The Brocade Virtual ADX natively understands protocol RTSP and provides load balancing for it. The
Brocade Virtual ADX can also provide Layer 7 health checks for RTSP. Refer to
“RTSP” on page 174
for details on Layer 7 health checks for RTSP.
If RTSP is bound to an unknown port, use the following command to provide RTSP server load
balancing.
Virtual ADX(config)#server rtsp-for-unknown-port
Syntax: [no] server rtsp-for-unknown-port
NOTE
The Brocade Virtual ADX supports RTSP client port values of up to 9999. If the client is using a port
number above 9999, you must configure the client to use a lower port value.
Deletion of UDP data session along with TCP control session
for RTSP
The Brocade Virtual ADX tracks both control and data sessions for RTSP regardless of the
underlying transport layer (TCP or UDP) used by these sessions. When the system deletes an RTSP
control session (TCP based), it also deletes the respective data session (which can be UDP based).
Use the following command to enable this functionality.
Virtual ADX(config)#server rtsp-delete-udp-with-tcp-sess
Syntax: [no] server rtsp-delete-udp-with-tcp-sess
TFTP load balancing
TFTP load balancing is supported with health checks.
The Brocade Virtual ADX can conduct Layer 3 and Layer 4 health checks for TFTP ports.
When you configure a TFTP port and bind it to a Virtual server, the Brocade Virtual ADX does a Layer
3 check, and if this check passes, it does a Layer 4 check.
To check the health of a TFTP port, the Brocade Virtual ADX sends out a request for the SIcheck.txt
file. The Brocade Virtual ADX does not actually interpret the reply packet. As long as it does not get
an "ICMP dest or port unreachable" message, the Brocade Virtual ADX keeps the TFTP port up. If it
gets an "ICMP unreachable" message, the Brocade Virtual ADX brings the TFTP port down.