Allied Telesis 2.6.1 manual Enabling and Disabling Switch Ports

Chapter 5

Layer 2 Switching

This section describes the Layer 2 switching features on the AT-8800 Series

Switch, and how to configure them.

Switch Ports

Each Ethernet switch port is uniquely identified by a port number. The switch supports a number of features at the physical level that allow it to be connected in a variety of physical networks. This physical layer (layer 1) versatility includes:

■Enabling and disabling of Ethernet ports.

■Auto negotiation of port speed and duplex mode for all 10/100 Ethernet ports.

■Manual setting of port speed and duplex mode for all 10/100 Ethernet ports.

■Link up and link down triggers.

■Port trunking.

■Packet storm protection.

■Port mirroring.

■Support for SNMP management

Enabling and Disabling Switch Ports

An switch port that is enabled is available for packet reception and transmission. Its administrative status in the Interfaces MIB is UP. Conversely, an Ethernet port that is disabled is not available for packet reception and transmission. It will not send or receive any frames; incoming STP BPDU packets are discarded. Its administrative status in the Interfaces MIB is DOWN. Every Ethernet port on the switch is enabled by default. Disabling a switch port does not affect the STP operation on the port. Enabling a switch port will allow the port to participate in spanning tree negotiation. A switch port that has been disabled by the Port Security feature cannot be enabled using the ENABLE SWITCH PORT command.