Debugging IPv6 HE Tunnel
here
For whatever reason, this interface doesn't work. All packets sent from it seem to go into the bit bucket. For example:
server:~> ping6 ipv6.google.com
PING ipv6.google.com(pv-in-x68.google.com) 56 data bytes
--- ipv6.google.com ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 3998ms
The output of the ifconfig command is below, and I'm interested in knowing what is wrong, but I'm also interested in learning what tools would be available for me to debug this type of issue in the future, too!
server:~>ifconfig
eth0 Link encap:Ethernet HWaddr fe:fd:40:3e:be:7d
inet addr:64.62.190.74 Bcast:64.62.190.255 Mask:255.255.255.0
inet6 addr: fe80::fcfd:40ff:fe3e:be7d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2434892 errors:0 dropped:0 overruns:0 frame:0
TX packets:1855876 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:514489967 (514.4 MB) TX bytes:950154288 (950.1 MB)
Interrupt:28
eth0:0 Link encap:Ethernet HWaddr fe:fd:40:3e:be:7d
inet addr:64.62.190.125 Bcast:64.62.190.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:28
hetunnel Link encap:IPv6-in-IPv4
inet6 addr: 2001:470:1f04:66::2/64 Scope:Global
inet6 addr: fe80::403e:be4a/128 Scope:Link
UP POINTOPOINT 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)
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:1366271 errors:0 dropped:0 overruns:0 frame:0
TX packets:1366271 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:147905132 (147.9 MB) TX bytes:147905132 (147.9 MB)
5 Replies
@jed:
ip6tables -nvL route -6Por favor.
:-)
I don't have a firewall installed, but here are the items you requested
server:~> sudo ip6tables -nvL
Chain INPUT (policy ACCEPT 104 packets, 8376 bytes)
pkts bytes target prot opt in out source destination
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 126 packets, 10424 bytes)
pkts bytes target prot opt in out source destination
server:~> sudo route -6
Kernel IPv6 routing table
Destination Next Hop Flag Met Ref Use If
::1/128 :: Un 0 1 5 lo
fe80::fcfd:40ff:fe3e:be7d/128 :: Un 0 1 0 lo
fe80::/64 :: U 256 0 0 eth0
ff00::/8 :: U 256 0 0 eth0
::/0 :: !n -1 1 2 lo
It seems that there is no default route for IPv6, however, I'd guess that is correct, because the IPv6 traffic should be tunneling through IPv4. Am I right?
Thanks again for the help!
auto 6in4
iface 6in4 inet6 v4tunnel
endpoint <remote ipv4="">
local <local ipv4="">
ttl 255
address <local ipv6="">
netmask 64
mtu 1480
up ip -6 route add ::/0 dev 6in4 metric 1
post-up sysctl -w net.ipv6.conf.all.forwarding=1</local></local></remote>
Dont know if last line is required or not
and here is my routing table for comparison:
Kernel IPv6 routing table
Destination Next Hop Flag Met Ref Use If
::1/128 :: Un 0 1 1171 lo
2001:470:1f04:54d::/128 :: Un 0 1 0 lo
2001:470:1f04:54d::2/128 :: Un 0 1 94079 lo
2001:470:1f04:54d::/64 :: Un 256 0 9 6in4
fe80::/128 :: Un 0 1 0 lo
fe80::42a0:8d94/128 :: Un 0 1 0 lo
fe80::fcfd:40ff:fe3e:e756/128 :: Un 0 1 0 lo
fe80::/64 :: U 256 0 0 eth0
fe80::/64 :: Un 256 0 0 6in4
ff00::/8 :: U 256 0 0 eth0
ff00::/8 :: U 256 0 0 6in4
::/0 :: U 1 0 0 6in4
::/0 :: !n -1 1 1 lo
@OverlordQ:
Dont know if last line is required or not
:)
It's not.