Date: Thu, 02 Mar 2000 11:29:10 +0900 From: Yoshinobu Inoue <shin@nd.net.fujitsu.co.jp> To: markk@knigma.org Cc: freebsd-current@FreeBSD.ORG Subject: Re: IPv6 diagnostic VMWARE 2 beta Message-ID: <20000302112910G.shin@nd.net.fujitsu.co.jp> In-Reply-To: <G1JJFQAfEYv4EwjF@knigma.org> References: <G1JJFQAfEYv4EwjF@knigma.org>
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> World of 20000228 under VMWARE 2.0-468 under NT4. > > Is this one for VMWARE? > > lnc0 = bridged adapter (network cable disconnected) > lnc1 = host adapter > > The following kernel diagnostics are presented during boot. > > lnc0: starting DAD for fe80:0001::0250:56ff:fe98:95ec > lnc1: starting DAD for fe80:0002::0250:56ff:fee7:93ca > lnc0: DAD detected duplicate IPv6 address fe80:0001::0250:56ff:fe98:95ec > : 1 NS, 0 NA > lnc0: DAD complete for fe80:0001::0250:56ff:fe98:95ec - duplicate found > lnc0: manual intervention required > lnc1: DAD complete for fe80:0002::0250:56ff:fee7:93ca - no duplicates > found > -- > Mark Knight The above log message is of IPv6 duplicated address detection. It is defined in RFC2462, and briefly it does following things, on each of connected interfaces. -Automatically create own addr. -But before actually enable it, do link local multicast query for the addr to the assocated interface, to check if there is already same addr assigned to another host. -Usually it success if no reply is obtained in some period, and fails if an reply is obtained. (It think same addr is already used by some other host.) So this procedure will fail in following cases. -Its own outstanding multicast packets are copyied back from network. -The interface is in PROMISCUS mode. (e.g. tcpdump is exec,ed on the interface.) I have not ever used VMWARE, but I suppose the above lnc0 is VMWARE's virtual bridging interface and copying back its own outstanding multicast packets? Yoshinobu Inoue To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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