3Com SuperStack 4 Configuration Manual page 43

Ethernet Port
Troubleshooting
Link Aggregation
Configuration
Overview
When receiving packets without a VLAN Tag, the port can forward them to the
■
member ports belonging to the default VLAN
When it is sending the packets with VLAN Tag and the packet VLAN ID is the
■
default VLAN ID, the trunk port will remove the packet VLAN Tag and forward
the packet.
Networking Diagram
Figure 12 Configuring the Default VLAN for a Trunk Port
Switch A
Configuration Procedure
The following configurations are used for Switch A. Configure Switch B in the
similar way.
1 Enter the Ethernet Port View of Ethernet1/0/1.
[SW5500]interface ethernet1/0/1
2 Set the Ethernet1/0/1 as a trunk port and allow VLAN 2, 6 through 50, and 100 to
pass through.
[SW5500-Ethernet1/0/1]port link-type trunk
[SW5500-Ethernet1/0/1]port trunk permit vlan 2 6 to 50 100
3 Create the VLAN 100.
[SW5500]vlan 100
4 Configure the default VLAN ID of Ethernet1/0/1 as 100.
[SW5500-Ethernet1/0/1]port trunk pvid vlan 100
Fault: Default VLAN ID configuration failed.
Troubleshooting: Take the following steps.
1 Use the
display interface
trunk port or a hybrid port. If it is neither, configure it as a trunk port or a hybrid
port.
2 Configure the default VLAN ID.
Brief Introduction to Link Aggregation
Link aggregation means aggregating several ports together to implement the
outgoing/incoming payload balance among the member ports and enhance the
connection reliability. Link aggregation includes manual aggregation, dynamic
LACP aggregation, and static LACP aggregation. In terms of load sharing, link
aggregation may be load sharing aggregation and non-load sharing aggregation.
Link Aggregation Configuration
Switch B
or command to check if the port is a
display port
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