SICOM Series CLI Command Manual
12
Chapter 2 Port Configuration
2.1 Port Configuration Overview
The port configuration of SICOM series Industrial Ethernet Switch contains port-related
configuration and the configuration of port-based functions. In the port configuration
commands, user can configure the functions of auto-negotiation, port enable, duplex, flow
control, mirroring, port rate, ACL, etc.
Auto negotiation:
SICOM series Industrial Ethernet Switch supports the auto-negotiation function for ports;
ports with auto-negotiation function can automatically negotiate the communication mode
(duplex state, communication speed, etc) according to the port state in the other end. This
function only work to 10/100M copper port and 1000M fiber or copper port; 100Base-FX
ports do not support auto negotiation and their fixed rate is 100M and the duplex mode is
full duplex.
Flow control:
SICOM series Industrial Ethernet Switch supports 802.3-based port flow control. At full
duplex mode, if the port receives data beyond its limit, the port would transmit flow control
frames so as to prevent the packet loss caused by the rate limit. At the half duplex mode, if
the port receives data beyond its limit, the port would generate the back pressure half duplex
collision detection frames to reduce the transmitting data from the sending end.
Mirroring
The mirroring of SICOM series Industrial Ethernet Switch is port-based mirroring. Its
function is to copy the data at the mirroring port to mirrored port(s) with the purpose of
monitoring mirroring ports, and so on.
ACL:
SICOM series Industrial Ethernet Switch supports Port + MAC-based ACL function with
“accept” and “reject” two modes which can basically guarantee the port security. At the
“accept” mode, only the configured MAC address can pass through switch. At the “reject”
mode, configured MAC address is not allowed to pass through the switch.
