Content-type: text/html Man page of 6to4relay

6to4relay

Section: System Administration Commands (1M)
Updated: 19 Nov 2002
Index Return to Main Contents
 

NAME

6to4relay - administer configuration for 6to4 relay router communication  

SYNOPSIS

/usr/sbin/6to4relay

/usr/sbin/6to4relay [-e] [-a addr]

/usr/sbin/6to4relay [-d]

/usr/sbin/6to4relay [-h]  

DESCRIPTION

The 6to4relay command is used to configure 6to4 relay router communication. Relay router communication support is enabled by setting the value of a variable that stores an IPv4 address within the tun module. This variable is global to all tunnels and defines the policy for communication with relay routers. By default, the address is set to INADDR_ANY (0.0.0.0), and the kernel interprets the value to indicate that support for relay router communication is disabled. Otherwise, support is enabled, and the specified address is used as the IPv4 destination address when packets destined for native IPv6 (non-6to4) hosts are sent through the 6to4 tunnel interface. The 6to4relay command uses a project private ioctl to set the variable.

6to4relay used without any options outputs the current, in-kernel, configuration status. Use the -a option to send packets to a specific relay router's unicast address instead of the default anycast address. The address specified with the -a option does not specify the policy for receiving traffic from relay routers. The source relay router on a received packet is non-deterministic, since a different relay router may be chosen for each sending native IPv6 end-point.

Configuration changes made by using the 6to4relay are not persistent across reboot. The changes will persist in the kernel only until you take the tunnel down  

OPTIONS

The 6to4relay command supports the following options:

-a addr Use the specified address, addr.

-e Enable support for relay router. Use -a addr if it is specified. Otherwise, use the default anycast address, 192.88.99.1.

-d Disable support for the relay router.

-h Help

 

OPERANDS

The following operands are supported:

addr A specific relay router's unicast address. addr must be specified as a dotted decimal representation of an IPv4 address. Otherwise, an error will occur, and the command will fail.

 

EXAMPLES

Example 1: Printing the In-Kernel Configuration Status

Use /usr/sbin/6to4relay without any options to print the in-kernel configuration status.

example# /usr/sbin/6to4relay

If 6to4 relay router communication is disabled, the administrator will see the following message:

6to4relay: 6to4 Relay Router communication support is disabled.

If 6to4 router communication is enabled, the user will see this message:

6to4relay: 6to4 Relay Router communication support is enabled.
IPv4 destination address of Relay Router = 192.88.99.1
 

EXIT STATUS

The following exit values are returned:

0 Successful completion.

>0 An error occurred.

 

FILES

/usr/sbin/6to4relay The default installation root

 

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE
AvailabilitySUNWcsu
Interface StabilityEvolving

 

SEE ALSO

ifconfig(1M), attributes(5)

Huitema, C. RFC 3068, An Anycast Prefix for 6to4 Relay Routers. Network Working Group. June, 2001.

Carpenter, B. and Moore, K. RFC 3056, Connection of IPv6 Domains via IPv4 Clouds. Network Working Group. February, 2001.  

DIAGNOSTICS

The 6to4relay reports the following messages:

6to4relay: input (0.0.0.0) is not a valid IPv4 unicast address

Example:

example# 6to4relay -e -a 0.0.0.0

Description:

The address specified with the -a option must be a valid unicast address.

6to4relay: option requires an argument -a
usage:
    6to4relay
    6to4relay -e [-a <addr>]
    6to4relay -d
    6to4relay -h

Example:

example# 6to4relay -e -a 

Description:

The -a option requires an argument.

usage:
    6to4relay
    6to4relay -e [-a <addr>]
    6to4relay -d
    6to4relay -h

Example:

example# 6to4relay -e -d

Description:

The options specified are not permitted. A usage message is output to the screen.

usage:
    6to4relay
    6to4relay -e [-a <addr>]
    6to4relay -d
    6to4relay -h

Example:

example# 6to4relay -a 1.2.3.4

Description:

The -e option is required in conjunction with the -a option. A usage message is output to the screen.

6to4relay: ioctl (I_STR) : Invalid argument

Example:

example# 6to4relay -e -a 239.255.255.255

Description:

The address specified with the -a option must not be a class d addr.


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
OPERANDS
EXAMPLES
EXIT STATUS
FILES
ATTRIBUTES
SEE ALSO
DIAGNOSTICS

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Time: 02:37:06 GMT, October 02, 2010