Brocade Virtual ADX Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 76)

60 Brocade Virtual ADX Server Load Balancing Guide
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Configuring Direct Server Return
2
Placing a session in delete queue
DSR fast delete places a session in a delete queue upon seeing the first FIN in Direct Server Return
(as opposed to the standard two FINs). The session is deleted in eight seconds instead of the
standard two minute FIN session age.
The DSR fast-delete option is enabled by default. To disable the option, enter commands as follows:
Virtual ADX(config)#server virtual-name-or-ip vs
Virtual ADX(config-vs-vs)#port 80 dsr no-fast-delete
Syntax: [no] port port dsr no-fast-delete
NOTE
The default setting is recommended in most cases. In the DSR setup, the Brocade Virtual ADX will
not be able to see a FIN message from a server, resulting into session piling up and connection drops
when the same TCP connection is reused within two minutes by a client.
L2 DSR configuration example
Direct Server Return may be used in many different Brocade Virtual ADX implementations including
the Hot Standby high availability (HA) scenario.
Figure 13 shows an example of an L2 DSR
configuration for an HA scenario.
FIGURE 13 Brocade Virtual ADX devices deployed in Direct Server Return configuration