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Chapter 3 Using the console interface 135
Using the BayStack 380 10/100/1000 Switch
Table 25 describes the High Speed Flow Control Configuration screen fields.
Choosing a high speed flow control mode
The high speed flow control feature allows you to control traffic and avoid
congestion on the Gigabit full-duplex link. If the receive port buffer becomes full,
the BayStack 380 Switch issues a flow-control signal to the device at the other end
of the link to suspend transmission. When the receive buffer is no longer full, the
switch issues a signal to resume the transmission. You can choose Symmetric or
Asymmetric flow control mode.
Table 25 High Speed Flow Control Configuration screen fields
Field Description
Port Allows you to select the port number to view or configure. To view or configure
another port, type its unit number and press [Enter], or press the spacebar to
toggle the port numbers.
Autonegotiation When enabled, the port only advertises support for 1000 Mb/s operation, in
full-duplex mode. Note: Autonegotiation can be changed only in the Port
Configuration screen.
Default Value Enabled
Range Enabled, Disabled
Speed/Duplex
Specifies the speed and duplexity mode (read only) and whether full or not.
Note: The speed can be changed in the Port Configuration screen.
Flow Control
Allows you to control traffic and avoid congestion on the Gigabit port. Two
modes are available (see “Choosing a high speed flow control mode,” next, for
details about the two modes). The Flow Control field can be configured only
when you set the Autonegotiation field value to Disabled and the speed to
1000M/bs/full duplex.
Default Value Disabled
Range Disabled, Symmetric, Asymmetric
Note: For high speed flow control, the BayStack 380 must be connected
to a device that is IEEE802.3x compliant.