3Com 10014298 manual Setting the Default Vlan ID for Ethernet Port

40CHAPTER 2: PORT CONFIGURATION

Perform the following configuration in Ethernet port view.

Table 35 Adding the Ethernet Port to Specified VLANs

Operation	Command
Add the current access port to a specified	port access vlan vlan_id
VLAN

Add the current hybrid port to specified VLANs

Add the current trunk port to specified VLANs

Remove the current access port from to a specified VLAN.

port hybrid vlan vlan_id_list { tagged untagged }

port trunk permit vlan { vlan_id_list all }

undo port access vlan

Remove the current hybrid port from to	undo port	hybrid vlan
specified VLANs.	vlan_id_list
Remove the current trunk port from specified	undo port	trunk permit vlan {
VLANs.	vlan_id_list all }

The access port will be added to an existing VLAN other than VLAN 1. The VLAN to which a Hybrid port is added must exist. The VLAN to which a Trunk port is added cannot be VLAN 1.

After adding the Ethernet port to the specified VLANs, the local port can forward packets from these VLANs. The hybrid and trunk ports can be added to multiple VLANs, thereby, implementing the VLAN intercommunication between peers. For the hybrid port, you can tag VLAN packets to process packets in different ways, depending on the target device.

Setting the Default VLAN ID for Ethernet Port

Since the access port can only be included in one VLAN, its default VLAN is the one to which it belongs. The hybrid port and the trunk port can be included in several VLANs, however, it is necessary to configure the default VLAN ID. If the default VLAN ID has been configured, the packets without VLAN Tag will be forwarded to the port that belongs to the default VLAN. When sending the packets with VLAN Tag, if the VLAN ID of the packet is identical to the default VLAN ID of the port, the system will remove VLAN Tag before sending this packet.

Perform the following configuration in Ethernet port view.

Table 36 Set the Default VLAN ID for the Ethernet Port

Operation	Command
Set the default VLAN ID for the hybrid port.	port hybrid pvid vlan vlan_id
Set the default VLAN ID for the trunk port	port trunk pvid vlan vlan_id
Restore the default VLAN ID of the hybrid port	undo port hybrid pvid
to the default value
Restore the default VLAN ID of the trunk port	undo port trunk pvid
to the default value

■A Trunk port and isolate-user-vlan cannot be configured simultaneously. A hybrid port and isolate-user-vlancan be configured simultaneously. However, if the default VLAN has been mapped in isolate-user-vlan, you cannot modify the default VLAN ID until the mapping relationship has been removed.