Ethernet Port Troubleshooting; Link Aggregation Configuration - 3Com 7700 Configuration Manual

34 C 2: P C
HAPTER ORT
Ethernet Port
Troubleshooting
Link Aggregation
Configuration
Link Aggregation
Configuration
ONFIGURATION
Figure 1 Configure the Default VLAN for a Trunk Port
Switch A
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.
[SW7700] interface ethernet1/0/1
2 Set the Ethernet1/0/1 as a trunk port and allows VLAN 2, 6 through 50, and 100
to pass through.
[SW7700-Ethernet1/0/1] port link-type trunk
[SW7700-Ethernet1/0/1] port trunk permit vlan 2 6 to 50 100
3 Create the VLAN 100.
[SW7700] vlan 100
4 Configure the default VLAN ID of Ethernet1/0/1 as 100.
[SW7700-Ethernet1/0/1] port trunk pvid vlan 100
If the default VLAN ID configuration fails, take the following steps:
1 Execute the display interface or display port command to check if the port is a
trunk port or a hybrid port. If it is neither of them, configure it as a trunk port or a
hybrid port.
2 Then configure the default VLAN ID.
Link Aggregation means aggregating several ports together to allow
outgoing/incoming payload balance among member ports. Link aggregation
appears as a single port physically.
The Switch 7700 supports 64 link aggregation groups. For the 48-port
10/100BASE-T auto-sensing fast Ethernet interface card, the first 24 ports can be
aggregated arbitrarily as long as they are assigned contiguously; meaning port 1
to port 2 to port 3 and so on. The same is true for the last 24 ports. For the other
interface cards, you can aggregate no more than the ports provided by each card.
The group can start from any port, as long as the ports in it are consecutive order.
In a link aggregation group, the port with the smallest number serves as the
master port, and the others serve as member ports. In one link aggregation group,
the link type of the master port and the member ports must be identical. That is,
the master port and the member ports should be in Trunk mode together, or be in
Access mode together.
Link aggregation configuration involves aggregating Ethernet ports or removing a
configured link aggregation.
Switch B