C
HAPTER
2
| Hardware Description
Front Panel
– 16 –
RJ-45 P
ORTS
The switch contains 16/24 1000BASE-T RJ-45 ports. All ports support automatic
MDI/MDI-X operation, so you can use straight-through cables for all network
connections to PCs or servers, or to other switches or hubs.
Each of these ports support auto-negotiation, so the optimum transmission
mode (half or full duplex), and data rate (10, 100, or 1000 Mbps) is selected
automatically.
Each port also supports IEEE 802.3x auto-negotiation of flow control, so the
switch can automatically prevent port buffers from becoming saturated.
S
MART
B
UTTON
When the Smart button is engaged, the unmanaged switch automatically
initiates smart switch functionality. The Smart button enables the following
functions:
◆
DHCP Prevention - restricts installation of a DHCP server to port 1 only,
preventing rogue DOS servers from being connected to the network.
◆
Loopback Detection and Prevention - The switch checks all ports for a
loopback condition every 2 seconds. Upon detection of a loopback condition,
the switch blocks the affected port’s traffic for 3 seconds and flashes the
Loop
On Red
The switch has detected a loop condition and
disabled the appropriate port. When the loop
clears, the LED will turn off.
Off
The switch has not detected a loop condition
or the current loop condition has cleared.
1 to 24
On/Blinking Green
Port has established a valid 100 Mbps
connection. Blinking indicates activity.
On/Blinking Amber
Port has established a valid 1000 Mbps
connection. Blinking indicates activity.
Flashing Amber
(two flashes per second)
The port is in a looped state and has been
disabled. When the loop clears, the port LED
will cease flashing.
Off
There is no valid link on the port.
Table 1: System and Port Status LEDs (Continued)
LED
Condition
Status
