Q-Logic 8100 SERIES 用户手册

6–Configuring NIC Functionality in the Converged Network Adapter

Configuring the NIC in a Linux Environment

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In most RHEL 5 environments, the VLAN 802.1q kernel module is loaded by 
default. VLAN interfaces cannot be created over the QLogic adapter NIC function 
without the VLAN 802.1q kernel module. 

To determine whether the VLAN 802.1q kernel module is loaded, issue the 
following command:

# lsmod | grep 8021q

If the command produces no output, the VLAN 802.1q Kernel Module is not 
loaded. If the output is similar to 

, the VLAN 802.1q kernel module is 

already loaded.

To load the VLAN 802.1q kernel module, issue the following command:

# modprobe -v 8021q

If the command produces no output, the VLAN 802.1q Kernel Module is 
already loaded. If the output contains the string insmod 
/lib/modules/2.6.18-164.el5/kernel/net/8021q/8021q.ko, 

the VLAN 802.1q kernel module has already been loaded.

To unload the VLAN 802.1q Kernel Module, issue the following command:

# modprobe -r 8021q

To verify that the VLAN 802.1q kernel module has been unloaded, refer to 

To display VLAN 802.1q kernel module version information, issue the following 
command:

# modinfo 8021q

Creating, modifying, or dissolving VLAN interfaces can reset the network 
connection. Do not configure VLAN interfaces on production systems.