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Author Topic: Can ping IPV6 server but not anything else  (Read 4753 times)

bhockney

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Can ping IPV6 server but not anything else
« on: October 03, 2012, 01:59:07 PM »

Hi there,

I set up my tunnel on Fedora 16 using the linux-route2 instructions, and I can now ping the remote server but not anything else, e.g., google.

# ifconfig he-ipv6

he-ipv6   Link encap:IPv6-in-IPv4 
          inet6 addr: fe80::1831:ae7f/128 Scope:Link
          inet6 addr: 2001:470:c:871::2/64 Scope:Global
          UP POINTOPOINT RUNNING NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:1499 (1.4 KiB)

#ip -6 route show
unreachable ::/96 dev lo  metric 1024  error -101
unreachable ::ffff:0.0.0.0/96 dev lo  metric 1024  error -101
2001:470:c:871::/64 via :: dev he-ipv6  proto kernel  metric 256
unreachable 2002:a00::/24 dev lo  metric 1024  error -101
unreachable 2002:7f00::/24 dev lo  metric 1024  error -101
unreachable 2002:a9fe::/32 dev lo  metric 1024  error -101
unreachable 2002:ac10::/28 dev lo  metric 1024  error -101
unreachable 2002:c0a8::/32 dev lo  metric 1024  error -101
unreachable 2002:e000::/19 dev lo  metric 1024  error -101
unreachable 3ffe:ffff::/32 dev lo  metric 1024  error -101
fe80::/64 dev eth0  proto kernel  metric 256
fe80::/64 via :: dev he-ipv6  proto kernel  metric 256
default dev he-ipv6  metric 1024

I can now ping the remote router:

#ping6 -c3 2001:470:c:871::1

PING 2001:470:c:871::1(2001:470:c:871::1) 56 data bytes
64 bytes from 2001:470:c:871::1: icmp_seq=1 ttl=64 time=23.7 ms
64 bytes from 2001:470:c:871::1: icmp_seq=2 ttl=64 time=17.3 ms
64 bytes from 2001:470:c:871::1: icmp_seq=3 ttl=64 time=16.4 ms

--- 2001:470:c:871::1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 16.459/19.197/23.797/3.275 ms

But I can't ping or connect to anything else, e.g. google:

#ping6 -c3 www.google.com
PING www.google.com(lax02s02-in-x11.1e100.net) 56 data bytes

--- www.google.com ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 1999ms

Any ideas?

-Bob
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broquea

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Re: Can ping IPV6 server but not anything else
« Reply #1 on: October 03, 2012, 02:12:16 PM »

2001:470:c:871::2 doesn't respond to pings. Try specifying 2000::/3 as default route and not ::/0. That bug shouldn't exist anymore in Fedora/CentOS/RHEL kernels since 2.6.18, but since you cannot get beyond the tserv, and I cannot reach you beyond it either, either the default route is incorrect, or the tunnel should get rebuilt on HE's side to verify it is correct and there are no dupe tunnels or something.

Also if that machine is behind NAT, make certain you used the RFC1918 IP as local when running the iproute2 commands. Although since you can ping upstream, I don't think that is the issue.
« Last Edit: October 03, 2012, 02:14:10 PM by broquea »
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bhockney

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Re: Can ping IPV6 server but not anything else
« Reply #2 on: October 03, 2012, 03:47:50 PM »

no joy adding 2000::/3 as a gateway route.

I'm running a relatively recent kernel:
# uname -r
3.4.11-1.fc16.i686.PAE

The machine is connected directly to the internet.

Route to IPV6 router:

#ip -6 route get to 2001:470:c:871::1
2001:470:c:871::1 from :: via :: dev he-ipv6  src 2001:470:c:871::2  metric 0

Route to www.google.com:

# ip -6 route get to 2001:4860:4007:801::1012
2001:4860:4007:801::1012 from :: via 2001:4860:4007:801::1012 dev he-ipv6  src 2001:470:c:871::2  metric 0

-Bob
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cholzhauer

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Re: Can ping IPV6 server but not anything else
« Reply #3 on: October 03, 2012, 04:02:41 PM »

You're not running from your /48 are you?
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broquea

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Re: Can ping IPV6 server but not anything else
« Reply #4 on: October 03, 2012, 04:05:02 PM »

email ipv6@he.net, ask them to verify your tunnel is built correctly, and no other dupe configs, etc.
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bhockney

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Re: Can ping IPV6 server but not anything else
« Reply #5 on: October 04, 2012, 06:43:59 AM »

I contacted support and they fixed it.  Thanks for your help.

-Bob
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