Unsupported IP header/ ethernet type msgs

[ahmedwahdan]

Describe your issue

This is the log when running sudo ./lvl-ip

~/level-ip$ sudo ./lvl-ip Unsupported ethertype 86dd ARP was not for us Unknown IP header proto : 2 Unsupported ethertype 86dd Unknown IP header proto : 17 Unknown IP header proto : 17 Unknown IP header proto : 17 Unsupported ethertype 86dd Unknown IP header proto : 2 Unknown IP header proto : 17 Unknown IP header proto : 17 Unsupported ethertype 86dd Unknown IP header proto : 17 ARP was not for us Unsupported ethertype 86dd Unsupported ethertype 86dd Unsupported ethertype 86dd Unknown IP header proto : 17 Unsupported ethertype 86dd Unsupported ethertype 86dd Unknown IP header proto : 17 Unsupported ethertype 86dd Unknown IP header proto : 17 Unsupported ethertype 86dd Unsupported ethertype 86dd Unsupported ethertype 86dd Unknown IP header proto : 17 Unknown IP header proto : 17 Unknown IP header proto : 17 Unsupported ethertype 86dd Unsupported ethertype 86dd Unknown IP header proto : 17 Unknown IP header proto : 17 Unsupported ethertype 86dd Unknown IP header proto : 17 Unsupported ethertype 86dd Unknown IP header proto : 17 Unsupported ethertype 86dd Unsupported ethertype 86dd Unknown IP header proto : 17 Unsupported ethertype 86dd Unsupported ethertype 86dd Unknown IP header proto : 17 Unsupported ethertype 86dd Unknown IP header proto : 17

Describe your running environment

Ubuntu 16.04 LTS

[Jackistang]

I have the same problem with you.

[Jackistang]

"Unsupported ethertype 86dd."
0x86DD is the IPv6 type, and the IPv6 protocol isn't supported in the programs.
But also I don't find the solutions.

[oliverhu]

@Jackistang facing the same issue, thank for pointing out it is due to ipv6. I think the solution would have to be taking the material learnt from the posts and build it out 😂

[helintongh]

Turn off ipv6 support on your computer.
In centos 7,you can
sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1

in ubuntu, you can:
sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1
sysctl -w net.ipv6.conf.lo.disable_ipv6 =1
then will not report this log.