Huawei S9300 Configuration Manual page 198

S9300&S9300E Terabit Routing Switch
Configuration Guide - IP Service
3.
Figure 11-4 ISATAP tunnel
IPv6 Host
The principle of an IPv4 or IPv6 host accessing an IPv6 network is as follows:
1.
2.
3.
6PE
On an IPv4 backbone network where the MPLS is deployed, the ISP can use the IPv6 Provider
Edge (6PE) technology to provide the interconnection capacity for the IPv6 networks of
dispersed users. 6PE is the PE with the IPv6 capacity.
Figure 11-5
1.
2.
3.
4.
Issue 01 (2012-03-15)
The IPv4/IPv6 host obtains its IPv6 address.
The IPv4/IPv6 host obtains its own IPv6 address by combining the ISATAP prefix with
5EFE:IPv4-Address, and uses this address to access the IPv6 host.
IPv6
Network
ISATAP
Switch
The IPv4 or IPv6 host in the IPv4 network obtains an IPv6 address based on the steps given
above.
The IPv4 or IPv6 host sends packets that are encapsulated in an IPv4 packet to the host in
the IPv6 network.
An ISATAP device decapsulates the IPv4 packet and sends the IPv6 packets to the IPv6
host.
shows the principle of interconnecting isolated IPv6 domains through 6PE.
When the 6PE device receives an IPv6 packet from the CE, it directly labels the packet to
translate the packet into an MPLS packet that can be transmitted over the IPv4 backbone
network.
The MPLS packet is forwarded to the remote 6PE through the LSP.
The remote 6PE removes the label and finds the IPv6 routing table according to the
destination address in the resulting IPv6 packet header.
The remote 6PE then sends the packet to the destination host in the remote IPv6 network
through the remote CE.
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11 IPv6 over IPv4 Tunnel Configuration
IPv4
Network
ISATAP Tunnel
IPv4/IPv6 Host
2.1.1.1
FE80::5EFE:0201:0101
3FFE::5EFE:0201:0101
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