The ipv6 enable command enables the tunnel. Alternatively, you could specify an IPv6 address, which
would also enable the tunnel.
Syntax: ipv6 address ipv6-prefix / prefix-length [ eui-64 ]
The ipv6 address command enables the tunnel. Alternatively, you could enter ipv6 enable , which
would also enable the tunnel.
Specify the ipv6-prefix parameter in hexadecimal format using 16-bit values between colons as
documented in RFC 2373.
Specify the prefix-length parameter as a decimal value. A slash mark (/) must follow the ipv6-prefix
parameter and precede the prefix-length parameter. The eui-64 keyword configures the global address
with an EUI-64 interface ID in the low-order 64 bits. The interface ID is automatically constructed in
IEEE EUI-64 format using the interface’s MAC address.
Clearing IPv6 tunnel statistics
You can clear statistics (reset all fields to zero) for all IPv6 tunnels or for a specific tunnel interface.
For example, to clear statistics for tunnel 1, enter the following command at the Privileged EXEC level
or any of the Config levels of the CLI.
device#clear ipv6 tunnel 1
To clear statistics for all IPv6 tunnels, enter the following command.
device#clear ipv6 tunnel
Syntax: clear ipv6 tunnel [number]
The number parameter specifies the tunnel number.
Displaying IPv6 tunnel information
Use the commands in this section to display the configuration, status, and counters associated with
IPv6 tunnels.
Displaying a summary of tunnel information
To display a summary of tunnel information, enter the following command at any level of the CLI.
device#show ipv6 tunnel
IP6 Tunnels
Tunnel Mode Packet Received Packet Sent
1 configured 0 0
2 configured 0 22419
Syntax: show ipv6tunnel
This display shows the following information.
IPv6 tunnel summary information TABLE 16
Field Description
Tunnel The tunnel interface number.
Clearing IPv6 tunnel statistics
FastIron Ethernet Switch Administration Guide 143
53-1003625-01
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