# Defining MD5 keys for OSPF virtual links using EDM

Use the following procedure to configure OSPF MD5 keys for OSPF virtual interfaces.

## Prerequisites

- Install the Advanced License.

- Enable IP routing globally on the switch.

- Assign an IP address to the VLAN that you want to enable with OSPF.

  Routing is automatically enabled on the VLAN when you assign an IP address to it.

## Procedure steps

1. From the navigation tree, double-click IP Routing.

2. In the IP Routing tree, double-click OSPF.

3. In the work area, click the Virtual If Message Digest tab.

4. In the toolbar, click Insert.

   The OSPF, Insert Virtual If Message Digest window appears.

5. Configure the parameters as required.

6. Click Insert.

## Variable definitions

The following table describes the fields of the Virtual If Message Digest tab.

Field | Description
--- | ---
AreaId | Specifies the area ID of the area associated with the virtual interface.
Neighbor | Specifies the IP address of the neighbor router associated with the virtual interface.
Index | Specifies the index value of the virtual interface message digest entry. The value is an integer between 1 and 255.
Type | Specifies the type of digest entry. Only MD5 is supported.
Key | Specifies the key value associated with the digest entry.