Brocade Communications Systems A7533A - Brocade 4Gb SAN Switch Base Command Reference Manual page 119

Virtual Channel Settings
The switch enables fine-tuning for a specific application by configuring the parameters for eight
virtual channels. The first two virtual channels are reserved for switch internal functions and are
not available for modification.
The default virtual channel settings have already been optimized for switch performance. Changing
the default values can improve switch performance but can also degrade performance. Do not
change these settings without fully understanding the effects of the changes.
Table 3 lists the virtual channel settings.
TABLE 3
Field
VC Priority specifies the class of frame traffic given priority for a virtual channel.
F_Port Login Parameters
Specify the F_Port login parameters to limit the number of virtual port logins. These are switch-wide
parameters applicable to all N_Port ID virtualization (NPIV) ports in the switch. The last two
parameters are related to staged F_Port bring up. Logins per second specifies the number of logins
the switch accepts per second in staged F_Port bring up. The Login stage interval parameter
specifies the stage interval in staged F_Port bring up. Unless there are issues with F_Port staging,
do not change default values.
TABLE 4
Field
Maximum logins per switch
Maximum logins per port
Logins per second
Login stage interval
(milliseconds)
Fabric OS Command Reference
53-1000599-02
Configure command virtual channel settings
Default
2
VC Priority 2
2
VC Priority 3
2
VC Priority 4
2
VC Priority 5
3
VC Priority 6
3
VC Priority 7
F_Port login parameters (* = multiplication symbol)
Range
2 to 3
2 to 3
2 to 3
2 to 3
2 to 3
2 to 3
Type Default
Number 16 * the max
number of ports
Number 126
Number 0
Number 0
configure
Range
1 to 126 * the
max number of
ports
1 to 255
0 to 100
0 to 10000
2
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