Using the Console Interface
309985-C Rev 00
3-57
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 gigabit MDA 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 MDA
issues a signal to resume the transmission.
You can choose Symmetric or Asymmetric flow-control mode.
Flow Control
Allows you to control traffic and avoid congestion on the gigabit MDA port. Two
modes are available (see
“Choosing a High Speed Flow Control Mode
” on
page 3-57
for details about the two modes). Autonegotiation must be disabled
for this port when using this feature.
Default
Disabled
Range
Disabled, Symmetric, Asymmetric
Note:
The following two fields appear only when a (single MAC) MDA with a
separate redundant Phy port is installed.
Preferred Phy
Allows you to choose the preferred Phy port; the other Phy port reverts to
backup.
Default
Right
Range
Right, Left
Active Phy
Indicates the operational Phy port.
Default
None
Range
None, Right, Left
Table 3-20.
High Speed Flow Control Configuration Screen Fields
(continued)
Field
Description