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Configuring IP Tunnel Interfaces

Configuring IPv6-over-IPv4 Tunnels

If you have a Tunnel PIC installed in your M Series or T Series router, you can configure IPv6-over-IPv4 tunnels. To define a tunnel, you configure a unicast tunnel across an existing IPv4 network infrastructure. IPv6/IPv4 packets are encapsulated in IPv4 headers and sent across the IPv4 infrastructure through the configured tunnel. You manually configure configured tunnels on each end point.

On SRX Series Firewalls, Generic Routing Encapsulation (GRE) and IP-IP tunnels use internal interfaces, gr-0/0/0 and ip-0/0/0, respectively. The Junos OS creates these interfaces at system bootup; they are not associated with a physical interface.

IPv6-over-IPv4 tunnels are defined in RFC 2893, Transition Mechanisms for IPv6 Hosts and Routers. For information about configuring a unicast tunnel, see Configuring Unicast Tunnels. For an IPv6-over-IPv4 tunnel configuration example, see Tunnel Services Overview.

Example: Configuring an IPv6-over-IPv4 Tunnel

Configure a tunnel on both sides of the connection.

Configuration on Router 1

Configuration on Router 2