Bug 402621

Summary:	net-misc/dhcpcd-5.5.3 filling syslog with radvd ads
Product:	Gentoo Linux	Reporter:	Harris Landgarten <harrisl>
Component:	[OLD] Core system	Assignee:	William Hubbs <williamh>
Status:	RESOLVED FIXED
Severity:	normal	CC:	base-system, roy
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	Only log RA when new, expires or different

Description Harris Landgarten 2012-02-08 01:18:10 UTC

ever since the upgrade to 5.5.3 I have been getting:

eth0: Router Advertisement from fe80::207:e9ff:fe00:aa89

messages in the log approximately every 30 seconds even though I already have an ipv6 ip.

Reproducible: Always

Comment 1 William Hubbs gentoo-dev

2012-02-08 02:39:09 UTC

dhcpcd-5.5.4 is now in the tree. Please let me know if this still
occurs.

Comment 2 Harris Landgarten 2012-02-08 03:49:47 UTC

Still getting the repeating log entries with 5.5.4

Comment 3 William Hubbs gentoo-dev

2012-02-08 04:47:15 UTC

Roy,

Do you have any ideas about what is causing this?

Thanks,

William

Comment 4 Roy Marples 2012-02-08 09:09:01 UTC

His router is broadcasting an IPv6 RA every 30 seconds, dhcpcd acts on this and logs it and runs the hooks script to re-configure RDNSS and DNSSL from the RA if needed, ala RFC 6106. Basically this RFC and dhcpcd compliance allows for a fully auto configued stateless IPv6 stack without the hassle for DHCPv6.

The only way to avoid logging it is to check that the latest RA received is 100% the same as the last one and nothing about it has expired.

Comment 5 William Hubbs gentoo-dev

2012-02-08 16:16:14 UTC

Roy, 

Is this check you mention something that you would add to dhcpcd, or
should I just close this bug as invalid since dhcpcd is working as
it is designed?

Comment 6 Harris Landgarten 2012-02-08 16:59:09 UTC

sudo grep "Router Advertisement" /var/log/messages | wc -l
25465


This is since Feb 5.

Comment 7 Roy Marples 2012-02-08 18:45:43 UTC

Created attachment 301267 [details, diff]
Only log RA when new, expires or different

Well, it is by design and thus not a bug.
However, some routers maybe spammy by default.

Please note that we do actually run the hooks script to every RA though.

Please test the attached patch and verify :)

Comment 8 Harris Landgarten 2012-02-08 19:32:43 UTC

Patch works for me. Thanks.

Comment 9 William Hubbs gentoo-dev

2012-03-02 16:37:32 UTC

This is fixed in dhcpcd-5.5.4.