in6_pfx_newpersistaddr: %s is already configured

Jared Mauch jared at puck.nether.net
Tue Dec 3 21:09:23 CET 2013


Anyone seen these logs on their machines?

I get a fairly consistent set of syslogs on my machines (MacOS 10.9) each time I get a RA from my cable modem.

14:18:13.209477 20:e5:2a:b8:10:cf > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 174: (hlim 255, next-header ICMPv6 (58) payload length: 120) fe80::22e5:2aff:feb8:10cf > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 120
	hop limit 64, Flags [managed, other stateful], pref medium, router lifetime 1800s, reachable time 0s, retrans time 0s
	  source link-address option (1), length 8 (1): 20:e5:2a:b8:10:cf
	    0x0000:  20e5 2ab8 10cf
	  prefix info option (3), length 32 (4): 2601:4:2180:300::/64, Flags [onlink, auto], valid time 345600s, pref. time 345600s
	    0x0000:  40c0 0005 4600 0005 4600 0000 0000 2601
	    0x0010:  0004 2180 0300 0000 0000 0000 0000
	  unknown option (24), length 24 (3): 
	    0x0000:  3800 0005 4600 2601 0004 2180 0300 0000
	    0x0010:  0000 0000 0000
	  rdnss option (25), length 40 (5):  lifetime 1200s, addr: 2001:558:feed::2 addr: 2001:558:feed::1
	    0x0000:  0000 0000 04b0 2001 0558 feed 0000 0000
	    0x0010:  0000 0000 0002 2001 0558 feed 0000 0000
	    0x0020:  0000 0000 0001

Dec  3 14:57:43 Jareds-NTT-iMac kernel[0]: in6_pfx_newpersistaddr: 2601:4:2180:300:426c:8fff:fe33:d4b0 is already configured!
Dec  3 14:58:13 Jareds-NTT-iMac kernel[0]: in6_pfx_newpersistaddr: 2601:4:2180:300:426c:8fff:fe33:d4b0 is already configured!
Dec  3 14:58:43 Jareds-NTT-iMac kernel[0]: in6_pfx_newpersistaddr: 2601:4:2180:300:426c:8fff:fe33:d4b0 is already configured!
Dec  3 14:59:13 Jareds-NTT-iMac kernel[0]: in6_pfx_newpersistaddr: 2601:4:2180:300:426c:8fff:fe33:d4b0 is already configured!
Dec  3 14:59:43 Jareds-NTT-iMac kernel[0]: in6_pfx_newpersistaddr: 2601:4:2180:300:426c:8fff:fe33:d4b0 is already configured!

I'm trying to diagnose if this is related to a problem I'm seeing as well.

If you have IPv6 at home (either RA or DHCPv6) I'm curious if you see similar messages in /var/log/system.log 

Thanks,

- Jared


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