Link Types Of Ethernet Ports; Assigning An Ethernet Port To Specified Vlans; Configuring The Default Vlan Id For A Port - H3C S5100-SI Operation Manual

Ports on Ethernet switches have the three link types: access, trunk, and hybrid. For the three types of
ports, the process of being added into a VLAN and the way of forwarding packets are different.
Port-based VLANs are easy to implement and manage and applicable to hosts with relatively fixed
positions.

Link Types of Ethernet Ports

The link type of an Ethernet port on the S5100-SI/EI series can be one of the following:
Access: An access port can belong to only one VLAN, and is generally connected to a user PC.
Trunk: A trunk port can belong to more than one VLAN. It can forward packets for multiple VLANs,
and is generally connected to another switch.
Hybrid: A hybrid port can belong to more than one VLAN to forward packets for multiple VLANs. It
can be connected to either a switch or a user PC.
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.

Configuring the Default VLAN ID for a Port

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:
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