Configuring Tunnel Interfaces

You can configure several types of tunnel interfaces in SonicOS:

• Numbered and unnumbered tunnel interfaces, WLAN tunnel interfaces, and IPv6 6to4 tunnel interfaces are configured on NETWORK | System > Interfaces.
• Drop tunnel interfaces and VPN tunnel interfaces are configured from NETWORK | System > Dynamic Routing; for more information, see Configuring Route Advertisements and Route Policies.
• Unnumbered tunnel interfaces are configured as part of a VPN policy from NETWORK | IPSec VPN > Rules and Settings; for information about VPN policies, see the SonicOS IPSec VPN Administration Guide.

Numbered and unnumbered tunnel interfaces are used with VPNs. A numbered tunnel interface is assigned its own IP address, but an unnumbered tunnel interface borrows an IP address from an existing physical or virtual (VLAN) interface.

Both numbered and unnumbered tunnel interface types support static routing and dynamic routing with RIP and OSPF, while numbered tunnel interfaces can also be used with BGP.

Also, both numbered VPN and unnumbered tunnel interfaces can support advanced routing, and unnumbered tunnel interfaces have no restrictions.

See these sections for configuring the various types of tunnel interfaces:

• Numbered Tunnel Interfaces; see Configuring VPN Tunnel Interfaces
• Unnumbered Tunnel Interfaces; see SonicOS Network Administration Guide
• WLAN Tunnel Interfaces; see Creating a WLAN Tunnel Interface
• Drop Tunnel Interfaces; see Drop Tunnel Interface
• IPv6 6to4 Tunnel Interfaces; see Configuring the 6to4 Auto Tunnel