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[solved] dhcpcd-9.1.2 causing packet storm

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Ant P.
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Joined: 18 Apr 2009
Posts: 6920

Posted: Tue Jun 30, 2020 6:32 am Post subject: [solved] dhcpcd-9.1.2 causing packet storm

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Since a recent update when dhcpcd starts up this happens:

Code:

eth0: requesting DHCPv6 information
eth0: REPLY6 received from fe80::XXXX
eth0: refresh in 86400 seconds
eth0: rebinding prior DHCPv6 lease
eth0: DHCPv6 REPLY: No Addresses Available
eth0: REPLY6 received from fe80::XXXX
eth0: refresh in 86400 seconds
eth0: rebinding prior DHCPv6 lease
eth0: DHCPv6 REPLY: No Addresses Available
eth0: REPLY6 received from fe80::XXXX
eth0: refresh in 86400 seconds
eth0: rebinding prior DHCPv6 lease

These few lines repeat about 10 times per second until I kill the daemon, and the only rate limiting seems to be that it's CPU-bound.

Is there a way to disable DHCPv6 only while leaving ipv6ra enabled? My current workaround's simply to mask the broken version, but that won't last forever.

Last edited by Ant P. on Wed Jul 01, 2020 3:55 am; edited 1 time in total

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UberLord
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Joined: 18 Sep 2003
Posts: 6835
Location: Blighty

Posted: Tue Jun 30, 2020 10:59 pm Post subject:

Until I can add a fix, you can add nodhcp6 to dhcpcd.conf _________________ Use dhcpcd for all your automated network configuration needs Use dhcpcd-ui (GTK+/Qt) as your System Tray Network tool

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Ant P.
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Joined: 18 Apr 2009
Posts: 6920

Posted: Wed Jul 01, 2020 3:54 am Post subject:

Oh, thanks. No idea how I missed that...

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UberLord
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Posts: 6835
Location: Blighty

Posted: Wed Jul 01, 2020 6:30 pm Post subject:

Could you post your dhcpcd.conf please? This should only happen is NODELAY is set. _________________ Use dhcpcd for all your automated network configuration needs Use dhcpcd-ui (GTK+/Qt) as your System Tray Network tool

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UberLord
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Posted: Wed Jul 01, 2020 7:11 pm Post subject:

Aha! I think I have this fixed here: https://roy.marples.name/cgit/dhcpcd.git/commit/?id=0834ecd0a81ea7c6e2909fe4482c52c5494fbcc1 _________________ Use dhcpcd for all your automated network configuration needs Use dhcpcd-ui (GTK+/Qt) as your System Tray Network tool

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Ant P.
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Joined: 18 Apr 2009
Posts: 6920

Posted: Wed Jul 01, 2020 8:28 pm Post subject:

I did have nodelay set, but I can confirm that patch fixes it.

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UberLord
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Posts: 6835
Location: Blighty

Posted: Thu Jul 02, 2020 10:45 am Post subject:

Great! But why do you have nodelay set? _________________ Use dhcpcd for all your automated network configuration needs Use dhcpcd-ui (GTK+/Qt) as your System Tray Network tool

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