DGS-6604
m
tunnel mode
CLI Reference Guide
914
tunnel mode
Use the
tunnel mode ipv6ip
configuration command to manually specify an
IPv6 configured tunnel. The optional parameter
6to4
or
isatap
means that tunnel
type is 6to4 or ISATAP. Use the no form of the command to remove the IPv6
specification.
tunnel mode ipv6ip [6to4 | isatap]
no tunnel mode
Default
None
Command Mode
Interface configuration
Usage Guideline
Tunnel interfaces are valid for this command.
In automatic 6to4 and ISATAP tunnels, routers are not configured in pairs. If a
tunnel interface has the tunnel destination address configured, then it will not be
able to configure the tunnel type to 6to4 or ISATAP tunnel mode.
In the 6to4 tunnel, the IPv4 address embedded in the IPv6 address is used to
locate the far end of the automatic tunnel. The IPv4 address of the border router
is extracted from the IPv6 address that, as an example, starts with the prefix
2002::/16, where the format is 2002::IPv4-address:/48.
The ISATAP tunnel uses a unicast address that includes a 64-bit IPv6 prefix and
a 64-bit interface identifier. The IPv4 address is encoded in the last 32 bits of the
interface identifier. When the IPv4 address is known to be globally unique, the
first 32 bits of the interface identifier is 0000:5EFE; otherwise it is 0200:5EFE.
The interface identifier is created in modified EUI-64 format.
Examples
This example shows how to specify an IPv6 manually configured tunnel.
Syntax Description
6to4
Specifies the IPv6 tunnel is a 6to4 tunnel type.
isatap
Specifies the IPv6 tunnel type is a ISATAP tunnel type.
Switch(config)# interface tunnel 2
Switch(config-if)#tunnel mode ipv6ip
Switch(config-if)#
Summary of Contents for DGS-6600-48TS
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