R3303-HP HSR6800 Routers Layer 3 - IP Services Configuration Guide

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b. The IPv6 protocol stack uses the destination IPv6 address of the packet to find the output
interface. If the output interface is the tunnel interface, the stack delivers it to the tunnel
interface.
c. After receiving the packet, the tunnel interface adds an IPv6 header to it and submits it to the
IPv6 protocol stack.
d. The IPv6 protocol stack forwards the packet according to its destination IPv6 address.
• De-encapsulation
e. Upon receiving the IPv6 packet, Device B delivers it to the IPv6 protocol stack.
f. The IPv6 protocol stack checks the protocol type of the data portion encapsulated in the IPv6
packet. If the encapsulation protocol is IPv6, the stack delivers the packet to the tunnel module.
g. The tunnel module de-encapsulates the packet and sends it back to the IPv6 protocol stack.
h. The IPv6 protocol stack forwards the IPv6 packet.
Protocols and standards
• RFC 1853, IP in IP Tunneling
• RFC 2473, Generic Packet Tunneling in IPv6 Specification
• RFC 2893, Transition Mechanisms for IPv6 Hosts and Routers
• RFC 3056, Connection of IPv6 Domains via IPv4 Clouds
• RFC 4214, Intra-Site Automatic Tunnel Addressing Protocol (ISATAP)
Tunneling configuration task list
Task Remarks
Configuring a tunnel interface N/A
Configuring an
IPv6 over IPv4
tunnel
Configuring an IPv6 manual tunnel
Optional.
Use one as needed.
Configuring an automatic IPv4-compatible IPv6 tunnel
Configuring a 6to4 tunnel
Configuring an ISATAP tunnel
Configuring an IPv4 over IPv4 tunnel Optional.
Configuring an IPv4 over IPv6 manual tunnel Optional.
Configuring an IPv6 over IPv6 tunnel Optional.
Configuring a tunnel interface
Configuration prerequisites
Configure a Layer 3 virtual tunnel interface on each device on a tunnel so that devices at both ends can
send, identify, and process packets from the tunnel.