3com S7906E Instrução De Instalação

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1-4 
Tunnel type 
Tunnel mode 
Manually configured tunnel 
IPv6 manual tunnel 
6to4 tunnel 
Automatic tunnel 
Intra-site automatic tunnel addressing protocol (ISATAP) tunnel 
 
The configuration parameters for each tunnel mode are listed in the following table: 
Tunnel mode 
Source/destination IP address of the tunnel 
IP address of the tunnel 
interface 
IPv6 manual 
tunnel 
The source/destination IP address is a manually 
configured IPv4 address. 
IPv6 address 
6to4 tunnel 
The source IP address is a manually configured 
IPv4 address, while the destination IP address 
does not need to be configured. 
6to4 address, in the format of 
2002:IPv4-source-address::/
48 
ISATAP tunnel 
The source IP address is a manually configured 
IPv4 address, while the destination IP address 
does not need to be configured. 
ISATAP address, in the 
format of 
Prefix:0:5EFE:IPv4-source-a
ddress/64 
 
1)  IPv6 manually configured tunnel 
A manually configured tunnel is a point-to-point link. Each link is a separate tunnel. IPv6 manually 
configured tunnels are mainly used to provide stable connections for regular secure communication 
between border routers or between border routers and hosts for access to remote IPv6 networks. 
2) 6to4 
tunnel 
An automatic 6to4 tunnel is a point-to-multipoint tunnel and is used to connect multiple isolated IPv6 
networks over an IPv4 network to remote IPv6 networks. The embedded IPv4 address in an IPv6 
address is used to automatically acquire the destination IPv4 address of the tunnel.  
The automatic 6to4 tunnel adopts 6to4 addresses. The address format is 2002:abcd:efgh:subnet 
number::interface ID/64, where 2002 represents the fixed IPv6 address prefix, and abcd:efgh 
represents the 32-bit globally unique source IPv4 address of the 6to4 tunnel, in hexadecimal notation. 
For example, 1.1.1.1 can be represented by 0101:0101. The part that follows 2002:abcd:efgh uniquely 
identifies a host in a 6to4 network. The tunnel destination is automatically determined by the embedded 
IPv4 address, which makes it easy to create a 6to4 tunnel. 
Because the 16-bit subnet number of the 64-bit address prefix in 6to4 addresses can be customized 
and the first 48 bits in the address prefix are fixed to a permanent value and the IPv4 address of the 
tunnel source or destination, it is possible that IPv6 packets can be forwarded by the tunnel.  
3) ISATAP 
tunnel 
With the application of the IPv6 technology, there will be more and more IPv6 hosts in the existing IPv4 
network. The ISATAP tunneling technology provides a satisfactory solution for IPv6 application. An 
ISATAP tunnel is a point-to-point automatic tunnel. The destination of a tunnel can automatically be 
acquired from the embedded IPv4 address in the destination address of an IPv6 packet.  
When an ISATAP tunnel is used, the destination address of an IPv6 packet and the IPv6 address of a 
tunnel interface both adopt special ISATAP addresses. The ISATAP address format is 
prefix(64bit):0:5EFE:ip-address. The 64-bit prefix is the prefix of a valid IPv6 unicast address, while