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openwrt router works, linux box doesnt.

Started by slaxative, October 24, 2008, 06:20:29 PM

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slaxative

I can ping6 anything with open wrt router.
I am unable to ping6 anything with Linux box.

Tunnel details...
     Server IPv4 address:     66.220.18.42
   Server IPv6 address:    2001:470:c:5::1/64
   Client IPv4 address:    xxx.xxx.xxx.xxx
   Client IPv6 address:    2001:470:c:5::2/64
   Routed /48:    2001:470:f001::/48
   Routed /64:    2001:470:d:5::/64

Router config
br-lan    Link encap:Ethernet  HWaddr 00:0C:41:D4:84:7E
          inet addr:10.10.10.100  Bcast:10.10.10.255  Mask:255.255.255.0
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          inet6 addr: 2001:470:f001::1/48 Scope:Global
          inet6 addr: 2001:470:d:5::1/64 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4618 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4312 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1023435 (999.4 KiB)  TX bytes:1739666 (1.6 MiB)

2001:470:c:5::/64 via :: dev henet  metric 256  mtu 1480 advmss 1420
2001:470:d:5::/64 dev br-lan  metric 256  mtu 1500 advmss 1440
2001:470:f001:beef::/64 dev br-lan  metric 256  mtu 1500 advmss 1440
2001:470:f001::/48 dev br-lan  metric 256  mtu 1500 advmss 1440
fe80::/64 dev eth0  metric 256  mtu 1500 advmss 1440
fe80::/64 dev br-lan  metric 256  mtu 1500 advmss 1440
fe80::/64 dev eth0.0  metric 256  mtu 1500 advmss 1440
fe80::/64 dev eth0.1  metric 256  mtu 1500 advmss 1440
fe80::/64 dev wl0  metric 256  mtu 1500 advmss 1440
fe80::/64 via :: dev henet  metric 256  mtu 1480 advmss 1420
ff00::/8 dev eth0  metric 256  mtu 1500 advmss 1440
ff00::/8 dev br-lan  metric 256  mtu 1500 advmss 1440
ff00::/8 dev eth0.0  metric 256  mtu 1500 advmss 1440
ff00::/8 dev eth0.1  metric 256  mtu 1500 advmss 1440
ff00::/8 dev wl0  metric 256  mtu 1500 advmss 1440
ff00::/8 dev henet  metric 256  mtu 1480 advmss 1420
default via 2001:470:c:5::1 dev henet  metric 1024  mtu 1480 advmss 1420
unreachable default dev lo  proto none  metric -1  error -128





Linux box config
eth0      Link encap:Ethernet  HWaddr 00:18:f3:90:ec:fb
          inet addr:10.10.10.10  Bcast:10.10.10.255  Mask:255.255.255.0
          inet6 addr: 2001:470:f001:beef:218:f3ff:fe90:ecfb/64 Scope:Global
          inet6 addr: fe80::218:f3ff:fe90:ecfb/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2147 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2345 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:481326 (470.0 KiB)  TX bytes:384337 (375.3 Ki

2001:470:f001:beef::/64 dev eth0  proto kernel  metric 256  expires 2592110sec mtu 1500 advmss 1440 metric 10 4294967295
fe80::/64 dev eth0  metric 256  mtu 1500 advmss 1440 metric 10 4294967295
ff00::/8 dev eth0  metric 256  mtu 1500 advmss 1440 metric 10 4294967295
default via fe80::200:ff:fe00:0 dev eth0  proto kernel  metric 1024  expires 1748sec mtu 1500 advmss 1440 metric 10 64
unreachable default dev lo  proto none  metric -1  error -101 metric 10 255



radvd.conf
interface br-lan
{
        AdvSendAdvert on;

#
# Disable Mobile IPv6 support
#
        AdvHomeAgentFlag off;

#
# example of a standard prefix
#
        prefix 2001:470:f001:beef::/64
        {
                AdvOnLink on;
                AdvAutonomous on;
                AdvRouterAddr off;
        };

};


This is the error I get while pinging from the Linux box to any ipv6 host.
PING irc.ipv6.he.net(irc.ipv6.he.net) 56 data bytes
From 2001:470:f001::1 icmp_seq=1 Destination unreachable: No route

The forwarding setting below is enabled.
echo 1 > /proc/sys/net/ipv6/conf/all/forwarding


Thank you for any help offered.

broquea

maybe assign 2001:470:f001:beef::1/64 to br-lan instead of 2001:470:f001::1/48 ?
also you default points to link-local, shouldn't it be the br-lan assigned address?

slaxative

Assigned the /64 to br-lan.
How do i modify the route to the correct host?
Shouldnt radvd take care of that?

broquea

yes, it should, i thought it odd that it would choose link-local

You can try restarting the linux machine's networking (/etc/init.d/network restart) and seeing if it picks up the correct information.
Or remove and setting the default route by hand (ip route del default dev eth0 ; ip route ::/0 dev eth0).

Also in all my configurations of radvd, I have "AdvRouterAddr" set to on. Maybe change yours from off to on and restart that linux machines networkiing

slaxative

Adjusted the line in radvd with no luck.
Still cant ping anything from Linux....

slaxative

Ok, I finally figured it out.
The line to forward ipv6 must be before you setup the tunnel on the router...
echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
This MUST be done before the tunnel is setup on openwrt Kamikaze 7.09.
This works fine now.

slaxative


kriteknetworks

Defnitely before radvd is started since radvd will fail to start when it checks if forwarding is enabled and finds it off.

scarpa

I was having a similar problem to the first poster who couldn't ping an IPv6 host. I ended up having to change route -A inet6 add ::/0 dev sit1 into route -A inet6 add 2000::/3 sit1 like broquea suggested (worked like a charm btw =D). Now I'm having a problem where I cannot use any ip except 2001:470:1f04:1f8::2. I know my way around linux, just not very well so any help on how to fix this would be really appreciated. I'm running Ubuntu, uname -a is Linux planck 2.6.20-15-generic.

jeverett

Quote from: slaxative on October 25, 2008, 05:17:30 PM
Ok, I finally figured it out.
The line to forward ipv6 must be before you setup the tunnel on the router...
echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
This MUST be done before the tunnel is setup on openwrt Kamikaze 7.09.
This works fine now.
So how did you fix that?  Did you move the echo 1 > /proc/sys/net/ipv6/conf/all/forwarding from the /etc/init.d/radvd script to the beginning of your tunnel script?

What's the working order for setting up the tunnel, starting radvd, etc.?

I have a similar problem as you, but I can ping from the router and the LAN but any attempt to access IPv6 web sites times out.

My /etc/rc.d now looks like this:
lrwxrwxrwx    1 root     root           19 Sep  9  2008 S40network -> /etc/init.d/network
lrwxrwxrwx    1 root     root           20 Sep  9  2008 S45firewall -> /etc/init.d/firewall
lrwxrwxrwx    1 root     root           23 Jan  1  2000 S47wlmacfilter -> /etc/init.d/wlmacfilter
lrwxrwxrwx    1 root     root           22 Jan  1  2000 S48tunhe-ipv6 -> /etc/init.d/tunhe-ipv6
lrwxrwxrwx    1 root     root           17 Jan  1  2000 S49radvd -> /etc/init.d/radvd

and I copied echo 1 > /proc/sys/net/ipv6/conf/all/forwarding to the beginning of my tunnel script.
#!/bin/sh /etc/rc.common
LOCALIP=x.x.x.x
POPIP=x.x.x.x
LOCTUN=2001:0db8:1234:4::2
REMTUN=2001:0db8:1234:4::1
START=48

start() {
        echo -n "Starting TunnelBroker.net IPv6 tunnel: "
        echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
        ip tunnel add he-ipv6 mode sit local $LOCALIP remote $POPIP
        ip link set he-ipv6 up
        #ip link set mtu 1280 dev he-ipv6
        #ip tunnel change he-ipv6 ttl 64
        ip -6 addr add $LOCTUN/64 dev he-ipv6
        ip -6 ro add default via $REMTUN dev he-ipv6
        #ip -f inet6 addr
        echo "Done."
}
stop() {
        echo -n "Stopping TunnelBroker.net IPv6 tunnel: "
        ip link set he-ipv6 down
        ip tunnel del he-ipv6
        echo "Done."
}
restart() {
        stop
        start
}

But, I still get sketchy routing/connectivity.
Quote from: broquea on October 24, 2008, 10:37:58 PMAlso in all my configurations of radvd, I have "AdvRouterAddr" set to on.
I also added this setting to my /etc/radvd.conf and now my default router shows up as the non-link-local address.  I still have sketchy IPv6 performance however.