Dell PowerConnect M6220 - Manual (Page 556)

554 Configuring Routing
Figure 9-59. Loopbacks Configuration - IPv6 Entry
5. Choose IPv6 from the drop-down box in the Protocol field.
6. Add the IPv6 Address.
7. Enter desired values in the remaining fields.
8. Click Submit.
The new loopback is saved, and the device is updated.
Configuring an Existing Loopback
1. Open the Loopback Configuration page.
2. Specify the loopback to configure in the Loopback drop-down menu.
3. Change field values as desired in the remaining fields.
4. Click Apply Changes.
The new configuration is saved, and the device is updated.