IPv4 point-to-point GRE tunnels

This section describes support for point-to-point Generic Routing Encapsulation (GRE) tunnels and how to configure them on a Brocade device.

GRE tunnels support includes the following:

• IPv4 over GRE tunnels. IPv6 over GRE tunnels is not supported.
• Static and dynamic unicast routing over GRE tunnels
• Multicast routing over GRE tunnels
• Hardware forwarding of IP data traffic across a GRE tunnel.
• Path MTU Discovery (PMTUD)