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#1 2008-04-14 04:00:45

astrix
Member
Registered: 2007-12-10
Posts: 3

Permanently removing IPv6 default route?

Hi,

I am on a university network which I figure sets an ipv6 default route with DHCP. Output from ip -6 route:

fe80::/64 dev eth0  metric 256  expires 21318932sec mtu 1500 advmss 1440 hoplimit 4294967295
default via fe80::98c9:cc4d:2027:e183 dev eth0  proto kernel  metric 1024  expires 65284sec mtu 1500 advmss 1440 hoplimit 4294967295
default via fe80::9c20:e192:7f04:9024 dev eth0  proto kernel  metric 1024  expires 65183sec mtu 1500 advmss 1440 hoplimit 4294967295
default via fe80::38a6:a838:abb2:7b31 dev eth0  proto kernel  metric 1024  expires 65361sec mtu 1500 advmss 1440 hoplimit 4294967295

I have trouble accessing a certain domain hosted on the university network. Some elucidating feedback from a professor who doesn't have the time to really help me troubleshoot:
"The problem seems to be that the IPv6 default route points to the link-local fe80:: network. <xxxxxx> has a global address which surely does not exist on the link-local network. But the kernel, likely forced by the default route, throws out a connection request to this link and then waits for a timeout...I assume when you remove the IP6 default route, the problem disappears. "

And indeed, when I sudo 'ip -6 route del default' a few times, my problems accessing that domain disappear.

I would like to know how I can permanently disable the ipv6 default route, since this is getting annoying. And I really don't have much of a clue how to do this :-)

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#2 2008-04-14 04:17:49

Ashren
Member
From: Denmark
Registered: 2007-06-13
Posts: 1,229
Website

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#3 2008-04-14 05:25:18

astrix
Member
Registered: 2007-12-10
Posts: 3

Re: Permanently removing IPv6 default route?

Thanks, that works and is a good solution considering I don't really use ipv6

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