Assigning An Ethernet Port To Specified Vlans; Configuring The Default Vlan Id For A Port - 3Com 5500-EI PWR Install Manual

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configure a port connected to a network device or user terminal as a hybrid port for access link

connectivity or trunk connectivity.

A hybrid port allows the packets of multiple VLANs to be sent untagged, but a trunk port only allows the

packets of the default VLAN to be sent untagged.

The three types of ports can coexist on the same device.

Assigning an Ethernet Port to Specified VLANs

You can assign an Ethernet port to a VLAN to forward packets for the VLAN, thus allowing the VLAN on

the current switch to communicate with the same VLAN on the peer switch.

An access port can be assigned to only one VLAN, while a hybrid or trunk port can be assigned to

multiple VLANs.

Before assigning an access or hybrid port to a VLAN, create the VLAN first.

An access port can belong to only one VLAN. Therefore, the VLAN an access port belongs to is also the

default VLAN of the access port. A hybrid/trunk port can belong to multiple VLANs, so you should

configure a default VLAN ID for the port.

After a port is added to a VLAN and configured with a default VLAN, the port receives and sends

packets in a way related to its link type. For detailed description, refer to the following tables:

Table 1-1 Packet processing of an access port

Processing of an incoming packet

For an untagged packet

Receive the packet and tag

the packet with the default

For a tagged packet

If the VLAN ID is just the

default VLAN ID, receive the

If the VLAN ID is not the

default VLAN ID, discard the

Processing of an outgoing

Strip the tag from the packet and

send the packet.

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