View and Add VLAN Fix-up Link for a specific device

You can manually add the Fix-up links between neighbor interfaces to help improve the VLAN Group calculation in the following situation: the device does not support NDP or NDP disabled on the device.

For example: Cisco ASA Firewall uses a physical interface connected to an L2 switch port.

1. On the Data Accuracy Discovery window, click the Topology tab and then click VLAN Fix-up Link.
   
2. Click Add Link to open the window.
   
3. Select the link type, then search and select the device interface and the neighbor interface to add the link.
   

There are two Link Types:  

• Direct Connect will affect both the VLAN group and L2 topology
• Virtual Connect only affects the calculation of VLAN groups. The Virtual Connect is designed to support Overlay technology such as OTV and VxLAN.

Note: You will need to enter the interface VLANs for both sides of the link:  If you only add one VLAN ID for each side of the link, the interfaces will be treated as access ports. In this case, the VLAN ID for each side could be either the same or different. If you only add VLAN Range for each side of the link, the interfaces will be treated as trunk ports. In this case, the VLAN ID for each side must be the same. You can use “,” to separate VLANs for a VLAN Range, and use “-” to indicate the range of a VLAN. For example: 2,4,6-9,11-19.

See also:

• Defining Discover Mac List
• Defining Black Mac List