Choose Manage→Service→Services from the NFM-P main menu. The Manage Services form opens.

Choose a VPRN service and click Properties. The VPRN Service (Edit) form opens.

On the service navigation tree, choose the first site to participate in the sham link. If you need to create the site, perform To configure a VPRN site .

Choose an L3 access interface for the site. If you need to create the L3 access interface, see To configure an L3 access interface on a VPRN site .

Configure OSPFv2 for the site. Perform To configure ISIS, L2TP, MLD, OSPFv2, OSPFv3, PIM, RIP, or WPP on a VPRN routing instance . Ensure that you select sub c in Step 4 .

Right-click on OSPFv2 under the Protocols icon in the service navigation tree and choose Create Sham Link. The ShamLink (Create) form opens.

Select the Remote Neighbor IP Address. This is the IP Address of the other site participating in the sham link.

Select and interface in the Interface panel.

Select the area ID in the Area panel.

Configure the Administrative State parameter.

Click on the Protocol Properties tab and configure the required parameters.

The Authentication tab is configurable, depending on the OSPF version. To configure authentication for the sham link, click on the Authentication tab and either:

1. Create an MD5-based authentication key, by setting the Authentication Type parameter to MD5-based and clicking Create. The Md5Key (Create) form opens. Configure the required parameters and save and close the form.

2. Create a simple password, setting the Authentication Type parameter to Simple Password and clicking Change Password to enter a password. The Password (Create) form opens. Configure the parameters and close the form.

To view OSPF configuration information on neighbor sites, click on the Virtual Neighbor tab.

Save the changes and close the form.

Repeat for the second site participating in the sham link.

Save the changes and close the forms.

End of steps