Date: Tue, 21 Aug 2012 11:57:56 +0900 From: Hajimu UMEMOTO <ume@FreeBSD.ORG> To: Andrey Chernov <ache@FreeBSD.ORG> Cc: svn-src-head@FreeBSD.ORG, svn-src-all@FreeBSD.ORG, src-committers@FreeBSD.ORG, John Baldwin <jhb@FreeBSD.ORG> Subject: Re: svn commit: r239356 - head/sbin/dhclient Message-ID: <ygeharxdk97.wl%ume@mahoroba.org> In-Reply-To: <20120821010311.GA8250@vniz.net> References: <201208171553.q7HFrhuf090457@svn.freebsd.org> <201208171507.07699.jhb@freebsd.org> <20120818195724.GA74684@vniz.net> <201208201409.55544.jhb@freebsd.org> <20120821010311.GA8250@vniz.net>
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Hi, >>>>> On Tue, 21 Aug 2012 05:03:11 +0400 >>>>> Andrey Chernov <ache@FreeBSD.ORG> said: ache> Having dual-stack machine it seems proper way for me to run both DHCP and ache> DHCPv6 clients (net-mgmt/wide-dhcp? net/dhcp6?). But I fear they both will ache> interact with single /etc/resolv.conf overriding each other there. FreeBSD 9 and above already have a feature to handle multiple source of DNS address,; resolvconf(8). Our dhclient(8) and rtsol(8) uses it to write /etc/resolv.conf. ache> As I already mention, perhaps it is router bug combined with the lack of ache> validity checking in dhclient itself. As result I currently have ache> /etc/resolv.conf: ache> nameserver 192.168.1.1 ache> nameserver <ipv6 address of the tunnel NS> Don't you see `# Generated by resolvconf' line in your generated /etc/resolv.conf? DHCP cannot carry an IPv6 address. I suspect your router advertises an IPv6 address of your DNS server. You can confirm where the DNS server addresss come from by executing `resolvconf -l'. The following is the output on my box for example: ume@yuga:~% resolvconf -l # resolv.conf from em0:dhcpv6 search mahoroba.org nameserver 2001:2f0:104:8010::1 nameserver 2001:2f0:104:8010:221:5aff:feeb:183 # resolv.conf from em0:slaac:[fe80::218:71ff:feec:5271] nameserver 2001:2f0:104:8010::1 search mahoroba.org # resolv.conf from em0 search mahoroba.org nameserver 192.168.100.59 nameserver 192.168.100.55 My network announces DHCPv6 and my box is configured to use DHCPv6. So, there are three sources for a DNS address, here. Sincerely, -- Hajimu UMEMOTO ume@mahoroba.org ume@{,jp.}FreeBSD.org http://www.mahoroba.org/~ume/
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