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Old 04-22-2014, 08:42 PM   #1
slack_
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Registered: Oct 2013
Distribution: Slackware, Arch
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Sudden IPv6 startup messages?


I took a look at this thread: http://www.linuxquestions.org/questi...tivity-879420/, because I wanted to disable IPv6. I recently had noticed when I fired up wireshark that there is constant ICMPv6 Router Advertisement packets. Seems to me that's really inefficient. Is this normal for your network to be clogged with these if you are IPv6 enabled? What is the router doing constantly advertising? If I leave wireshark on for a minute or so, these packets completely fill up the screen.

Anyway, because of this I wanted to disable IPv6. It seems though that this is not a good idea? Why exactly? How does this 'break' my network configuration?

Also, today on startup there was an IPv6 solicitation message(which has never happened before), and it was requesting a DHCPv6 lease. This has never happened before and it slows everything down. Do I really have to deal with this? Why the sudden IPv6 startup messages when dhcp is happening?

EDIT: Oh, one more thing I forgot to add. I've disabled IPv6 on the router itself, so I don't see how disabling IPv6 on my computer will break anything if I have disabled IPv6 on the network anyway.

Last edited by slack_; 04-22-2014 at 08:43 PM.
 
Old 04-23-2014, 01:09 PM   #2
Smokey_justme
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Well, maybe because you've disabled IPv6 on your router, you got this message and stuff is going bad!? You are free to disable it on your computer... First off, if your ISP support IPv6 (and has a DNS which supports it), your IPv6-enabled computer might ask the DNS for an AAAA record (IPv6 address) for a domain with IPv6 support.. And guess what, your computer will try to connect there, but the router won't know what to do. This might explain both your Wireshark output and slow down (since it takes a while until the fall-back kicks in)..

If you really want to disable it, than do it.. But do it both on your computer and on your router.. Also, think about putting the router as your primary DNS for the computer..

Last edited by Smokey_justme; 04-23-2014 at 01:11 PM.
 
Old 04-26-2014, 04:39 PM   #3
slack_
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Registered: Oct 2013
Distribution: Slackware, Arch
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That's a good point, however, the router was spewing IPv6 advertisements before I tried to disable it. That's what made me want to disable it. I will use the router as my DNS server though.
 
  


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