Allied Telesis AT-A16 Manual do Utilizador descarregar pdf (Página 5)

Switching 3-5

Software Release 2.6.4

C613-03081-00 REV A

By using Virtual LANs (VLANs), a single physical LAN can be separated into

multiple Virtual LANs. VLANs can be used to:

■ Further improve LAN performance, as broadcast traffic is limited to LAN

segments serving members of the VLAN to which the sender belongs.

■ Provide security, as frames are forwarded to those stations belonging to the

sender’s VLAN, and not to stations in other VLANs on the same physical

LAN.

■ Reduce the cost of moving or adding stations to function or security based

LANs, as this generally requires only a change in the VLAN configuration.

Switch Ports

The term port is used frequently in switch terminology. Each port in a switch is

associated with one of the physical interfaces on the switch. Each port is

uniquely identified by a port number. The switch supports a number of

features at the physical level that allows it to be connected in a variety of

physical networks. This physical layer (Layer 1) versatility includes:

■ Enabling and disabling Ethernet ports.

■ Autonegotiation of port speed and duplex mode for all 10/100 Ethernet

ports and copper gigabit ports.

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

ports and copper gigabit ports.

■ Port trunking.

■ Packet storm protection.

■ Port mirroring.

■ Support for SNMP management.

■ Link triggers for fibre ports.

Enabling and disabling switch ports

A switch port that is enabled is available for packet reception and transmission.

Its administrative status in the Interfaces MIB is UP. Conversely, a port that is

disabled is not available for packet reception and transmission. It does not send

or receive frames and its administrative status in the Interfaces MIB is DOWN.

Every port on the switch is enabled by default. A switch port that has been

disabled by the Port Security feature cannot be enabled using the ENABLE

SWITCH PORT command.

To enable or disable a switch port, use the commands:

ENABLE SWITCH PORT={port-list|ALL}

DISABLE SWITCH PORT={port-list|ALL}

Resetting ports at the hardware level discards all frames queued for reception

or transmission on the port, and restarts autonegotiation of port speed and

duplex mode. Ports are reset using the command:

RESET SWITCH PORT={port-list|ALL} [COUNTER]

1 2 3 4 5 6 7 8 9 10 ... 153 154

Comentários a estes Manuais

Sem comentários

Allied Telesis AT-A16 Manual do Utilizador Página 5

Comentários a estes Manuais

Manuais e produtos relacionados com Comutadores de rede Allied Telesis AT-A16