[ds6] IPv6 Scope:Compat

[Bellino, Phil]

Hello,
Running 2.6.11 kernel.
I set up a tunnel with the following commands:

ip tunnel add tun6to4 mode sit ttl 255 remote any local 140.175.165.63
ip link set dev tun6to4 up
ip -6 addr add 2002:8caf:a53f::1/16 dev tun6to4

This all works fine, but I get the following output from the "ifconfig
tun6to4" command:
tun6to4   Link encap:IPv6-in-IPv4
          inet6 addr: 2002:8caf:a53f::1/16 Scope:Global
          inet6 addr: ::140.175.165.63/128 Scope:Compat
          UP RUNNING NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b) 

Can anyone explain to me what the function of the "Scope:Compat” is in the
above configuration and how I can use it to my benefit?

Thanks,
Phil Bellino

============================
Phil Bellino
MRV Communications, Inc.
Boston Product Division
295 Foster St.
Littleton,MA 01460
Tel: (978)952-4807
Email: pbellino at mrv.com
============================

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