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Old 08-11-2011, 09:52 PM   #1
jazzsir
LQ Newbie
 
Registered: Aug 2011
Posts: 8

Rep: Reputation: Disabled
Unhappy [IPv6] Problem with 6to4 tunnels

Hi,

I followed http://www.tldp.org/HOWTO/Linux+IPv6...4-tunnels.html
to set up a 6to4 tunnel for my router.
But, when setting up a "ip route" using "metric 1" the problem is encountered as below.
if "metric 1" is excluded, the command succeeded. but I can't ping6 ipv6.google.com

-Problem
Code:
# ip tunnel add tun6to4 mode sit remote any local 150.150.140.233
# ip link set dev tun6to4 up
tun6to4: Disabled Privacy Extensions
# ip -6 addr add 2002:9696:8ce9::1/48 dev tun6to4
# ip -6 route add 2000::/3 via ::192.88.99.1 dev tun6to4 metric 1
ip: either "to" is duplicate, or "metric" is a garbage.
# ip -6 addr add 2002:9696:8ce9:ffff::1/64 dev br0
-Environment
Code:
# uname -a
Linux cpe.amazon_s.infineon.com 2.6.20.19 #21 Fri Aug 12 09:54:58 KST 2011 mips unknown
# busybox
BusyBox v1.00 (2011.08.03-08:42+0000) multi-call binary
-ip -6 route
Code:
# ip -6 route
::/96 via :: dev tun6to4  metric 256  expires -34sec
2002:9696:8ce9:ffff::/64 dev br0  metric 256  expires -17sec
2002:9696:8ce9::/48 dev tun6to4  metric 256  expires -26sec
fe80::/64 dev br0  metric 256  expires -155sec
fe80::/64 dev eth0  metric 256  expires -153sec
fe80::/64 dev wan  metric 256  expires -145sec
fe80::/64 dev eth1  metric 256  expires -145sec
fe80::/64 dev tun6to4  metric 256  expires -26sec
unreachable default dev lo  metric -1  error -128
ff00::/8 dev br0  metric 256  expires -155sec
ff00::/8 dev eth0  metric 256  expires -153sec
ff00::/8 dev wan  metric 256  expires -145sec
ff00::/8 dev eth1  metric 256  expires -145sec
ff00::/8 dev tun6to4  metric 256  expires -26sec
unreachable default dev lo  metric -1  error -128
#
-ifconfig
Code:
# ifconfig
br0       Link encap:Ethernet  HWaddr 00:E0:92:00:01:40  
          inet addr:192.168.1.1  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: 2002:9696:8ce9:ffff::1/64 Scope:Global
          inet6 addr: fe80::220:daff:fe86:2374/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:1270 (1.2 KiB)

eth0      Link encap:Ethernet  HWaddr 00:E0:92:00:01:40  
          inet6 addr: fe80::2e0:92ff:fe00:140/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1 errors:0 dropped:0 overruns:0 frame:0
          TX packets:26 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:4294967276 (3.9 GiB)  TX bytes:2092 (2.0 KiB)

eth1      Link encap:Ethernet  HWaddr 00:20:DA:86:23:75  
          inet6 addr: fe80::220:daff:fe86:2375/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:12617 errors:0 dropped:121 overruns:0 frame:0
          TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:978599 (955.6 KiB)  TX bytes:1206 (1.1 KiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  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)

tun6to4   Link encap:UNSPEC  HWaddr 96-96-8C-E9-00-00-00-00-00-00-00-00-00-00-00-00  
          inet6 addr: 2002:9696:8ce9::1/48 Scope:Global
          inet6 addr: ::150.150.140.233/128 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)

wan       Link encap:Ethernet  HWaddr 00:20:DA:86:23:75  
          inet addr:150.150.140.233  Bcast:150.150.255.255  Mask:255.255.0.0
          inet6 addr: fe80::220:daff:fe86:2375/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:11734 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:937885 (915.9 KiB)  TX bytes:720 (720.0 B)

#
Also, I tryed to use ifconfig and route command instead of 'ip' command as below
But, I coudn't also ping6
# /sbin/ifconfig sit0 up
# /sbin/ifconfig sit0 add <local6to4address>/16
# /sbin/route -A inet6 add 2000::/3 gw ::192.88.99.1 dev sit0
Last edited by jazzsir; 08-17-2011 at 01:20 AM.
 
Old 08-12-2011, 07:12 PM   #2
janhe
Member
 
Registered: Jul 2007
Location: Belgium
Distribution: slackware64 14.2, slackware 13.1
Posts: 371

Rep: Reputation: 54
Quote:
Originally Posted by jazzsir View Post
Hi,

I followed http://www.tldp.org/HOWTO/Linux+IPv6...4-tunnels.html
to set up a 6to4 tunnel for my router.
But, when setting up a "ip route" using "metric 1" the problem is encountered as below.
if "metric 1" is excluded, the command succeeded. but I can't ping6 ipv6.google.com

-Problem
Code:
# ip tunnel add tun6to4 mode sit remote any local 150.150.140.233
# ip link set dev tun6to4 up
tun6to4: Disabled Privacy Extensions
# ip -6 addr add 2002:9696:8ce9::1/48 dev tun6to4
why do you use prefix /48 instead of /16 like the howto says?
Quote:
Originally Posted by jazzsir View Post
Code:
# ip -6 route add 2000::/3 via ::192.88.99.1 dev tun6to4 metric 1
ip: either "to" is duplicate, or "metric" is a garbage.
have you tried the propper IPv6 notation (not the IPv4 compatible one?
From your howto:
Code:
# /sbin/ip -6 route add 2000::/3 via 2002:c058:6301::1 dev tun6to4 metric 1
 
Old 08-15-2011, 08:07 PM   #3
jazzsir
LQ Newbie
 
Registered: Aug 2011
Posts: 8

Original Poster
Rep: Reputation: Disabled
the problem is not solved
Quote:
Originally Posted by janhe View Post
why do you use prefix /48 instead of /16 like the howto says?

have you tried the propper IPv6 notation (not the IPv4 compatible one?
From your howto:
Code:
# /sbin/ip -6 route add 2000::/3 via 2002:c058:6301::1 dev tun6to4 metric 1
I followed your advice,
However, problems still remain. as below

# ip tunnel add tun6to4 mode sit remote any local 150.150.140.233
# ip link set dev tun6to4 up
tun6to4: Disabled Privacy Extensions
# ip -6 addr add 2002:9696:8ce9::1/16 dev tun6to4
# ip -6 route add 2000::/3 via 2002:c058:6301::1 dev tun6to4 metric 1
ip: either "to" is duplicate, or "metric" is a garbage.
Last edited by jazzsir; 08-15-2011 at 09:18 PM.
 
Old 08-16-2011, 03:59 AM   #4
janhe
Member
 
Registered: Jul 2007
Location: Belgium
Distribution: slackware64 14.2, slackware 13.1
Posts: 371

Rep: Reputation: 54
Ok, maybe try to add the "metric 1" part before the "via 2002:..." part?
Code:
ip -6 route add 2000::/3 metric 1 via 2002:c058:6301::1 dev tun6to4
What distro are you using? What version of iproute2?
Code:
ip -Version
 
Old 08-16-2011, 05:17 AM   #5
jazzsir
LQ Newbie
 
Registered: Aug 2011
Posts: 8

Original Poster
Rep: Reputation: Disabled
Quote:
Originally Posted by janhe View Post
Ok, maybe try to add the "metric 1" part before the "via 2002:..." part?
Code:
ip -6 route add 2000::/3 metric 1 via 2002:c058:6301::1 dev tun6to4
What distro are you using? What version of iproute2?
Code:
ip -Version
The result is the same as before.
My environment is below

# uname -a
Linux cpe.amazon_s.infineon.com 2.6.20.19 #21 Fri Aug 12 09:54:58 KST 2011 mips unknown
# busybox
BusyBox v1.00 (2011.08.03-08:42+0000) multi-call binary

Anyway, Thank you for your reply~
 
Old 08-17-2011, 01:20 AM   #6
jazzsir
LQ Newbie
 
Registered: Aug 2011
Posts: 8

Original Poster
Rep: Reputation: Disabled
After upgrading busybox from 1.00 to 1.13.2
I can set up "ip -6 route" with "metric 1"
 
  


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