TMS zl Management and Configuration Guide ST.1.1.100226

7-193
Virtual Private Networks
Configure a GRE Tunnel
Figure 7-160. Example GRE Tunnel
Configure Routes that Use the GRE Tunnel Interface
In order for the TMS zl Module to send traffic over the GRE tunnel, it must
have routes to the appropriate subnets that use the GRE tunnel interface. You
can:
■ Create static routes
See “Configure Static Routes” on page 7-193
■ Set up RIP on the GRE tunnel interface
See “Configure RIP on a GRE Tunnel Interface” on page 7-195.
■ Set up OSPF on the GRE tunnel interface
See “Configure OSPF on a GRE Tunnel Interface” on page 7-198.
When you have a redundant GRE tunnel, you must create one route over the
primary tunnel and a floating static route over the secondary tunnel. The
floating static route has a higher metric than a primary static route or a primary
default route. A floating static route has a higher administrative distance than
a primary dynamic route.
Configure Static Routes
To configure static routes for the GRE tunnel, follow these steps:
1. Access the Network > Routing > Static Routes window.
2. Click Add static route. The Add static route window is displayed.