By default, paravirtualized interfaces are assigned to the Gigabit Ethernet interfaces. |
When the device is rebooted, the interfaces are sorted in ascending order by MAC address. When a new interface is added, it may be sorted into the middle of the list. |
Example:
vwlc# debug
vwlc(debug)# show nic
Interface Permanent MAC Connected NIC model
---------- ------------------ ---------- ------------------------
gi1/0/1 08:00:27:6e:0c:e4 Yes 82540EM Gigabit
Ethernet Controller
gi1/0/2 08:00:27:f8:66:c9 Yes 82540EM Gigabit
Ethernet Controller |
Add an interface in the hypervisor and restart vWLC.
vwlc# debug
vwlc(debug)# show nic
Interface Permanent MAC Connected NIC model
---------- ------------------ ---------- ------------------------
gi1/0/1 08:00:27:6e:0c:e4 Yes 82540EM Gigabit
Ethernet Controller
gi1/0/2 08:00:27:a4:a8:87 Yes Virtio network device
gi1/0/3 08:00:27:f8:66:c9 Yes 82540EM Gigabit
Ethernet Controller |
As can be seen, the interface was added and took a place in the middle of the list.
For correct operation, all settings applied to gi1/0/2 must be transferred to gi1/0/3. |
If necessary, the position of the interfaces in vWLC can be changed. To do this:
1. Go to the debug menu.
vwlc# debug |
2. Run the the show nic command to show the interfaces available:
vwlc(debug)# show nic Interface Permanent MAC Connected NIC model ---------- ------------------ ---------- ------------------------ gi1/0/1 08:00:27:b3:9a:05 Yes 82540EM Gigabit Ethernet Controller gi1/0/2 08:00:27:d4:21:a5 Yes Virtio network device |
3. Next, the MAC address of the required interface must be bound to the vWLC interface. In the example, the MAC address 08:00:27:d4:21:a5 is assigned to fortygigabitethernet 1/0/1:
vwlc(debug)# nic bind mac 08:00:27:d4:21:a5 fortygigabitethernet 1/0/1 |
4. To apply the settings, reboot the device.
vwlc# reload system |
5. After the reboot, use the show interfaces status command to check that the interface has been redefined:
vwlc# show interfaces status Interface Admin Link MTU MAC address Last change Mode State State -------------------- ----- ----- ----- ----------------- ------------------------- ------------ gi1/0/1 Up Up 1500 08:00:27:b3:9a:05 47 seconds routerport fo1/0/1 Up Up 1500 08:00:27:d4:21:a5 47 seconds routerport |
By default, vWLC has the system MAC address A6:00:00:00:00:00 and the serial number VWLC0000000. For correct operation of L2 protocols, it is recommended to change it. |
The device MAC address is generated based on the serial number. |
To change the MAC address:
1. Set the serial number:
vwlc# set system serial-number VWLC0000001 WARNING!!! Changes of serial number will be applied after system reboot |
2. Reboot the device.
By default, vWLC logs are output to the VGA console. |
The virtual-serial command enables output of system logs to the virtual serial console.
Using the command in the configuration:
vwlc# configure vwlc(config)# syslog console vwlc(config-syslog-console)# virtual-serial 2025-08-15T09:57:16+00:00 %SYS-W-EVENT: WARNING!!! Changes of virtual-serial will be applying after reboot vwlc(config-syslog-console)# end |
To apply the settings, the device must be rebooted.
For more information about connecting a serial port, see the vWLC installation instructions for the required virtualization system in the vWLC installation guide.