# Define GRE Protocol parameters

The Generic Routing Encapsulation (GRE) protocol is a tunneling protocol that allows the encapsulation of network layer packets inside IP tunneling packets.

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For more details about the product and how to configure features, click Help or press F1.

## Steps

1. In the properties of a custom Service you have created, click Select next to the Protocol field and select GRE.
2. On the Protocol Parameters tab, set the parameters for the Protocol.
3. Click OK.