User manual
11
wEb-bASED bROwSER MANAGEMENT
Link: Displays the current link status of each port: “1000MFDX,” “100MFDX,”
“100MHDX,” “10MFDX,” “10MHDX” or “Down.” The eld lights green and shows
the link speed if there is a valid connection on the port.
Mode: Options are “Auto speed,” “10M/Half,” “10M/Full,” “100M/Half,” “100M/Full,”
“1000M/Full” and “Disabled.” Default: Auto. Enabling auto-negotiation (“Auto”)
results in speed and duplex being negotiated upon link detection; both end devices
must be auto-negotiation compliant for the best possible results. 10Mbps and
100Mbps ber optic media don’t support auto-negotiation, so these media must be
explicitly congured to either half or full duplex. Full duplex operation requires that
both ends be congured as such; otherwise, severe frame loss will occur during
heavy network trafc. “Auto” supports all speed and duplex modes. Disabling a
port (for troubleshooting or to secure it from unauthorized connections, perhaps)
will prevent all frames from being sent and received on that port. Also, when
disabled, link integrity pulses aren’t sent, so the link/activity LED will never be lit.
Flow Control: Either “Enabled” or “Disabled” (default). This is useful for preventing
frame loss during times of severe network trafc. Examples of this include
multiple source ports sending to a single destination port or a higher-speed port
bursting to a lower-speed port. When the port is half duplex, it is accomplished
using backpressure, in which the switch simulates collisions, causing the sending
device to retry transmissions according to the Ethernet backoff algorithm. When
the port is full duplex, it is accomplished using PAUSE frame, which causes the
sending device to stop transmitting for a certain period of time.
Drop frames after excessive collisions: Either “Enabled” or “Disabled” (default).
Enable to discard the frames after excessive collision.
Jumbo Frame Support: Either “Enabled” or “Disabled” (default, or 1518 bytes).
Enable to adjust the size of Jumbo Frames to a maximum value of 9600 bytes.
PVLANS
Congure the port-based VLAN members on this screen. You need to congure
the current VLAN mode on the System Conguration screen to be PVLAN.