On 10/23/14 18:55, Peter J. Philipp wrote: > I have a tcpdump set in the background on OpenBSD 5.5-current from: > > mercury$ sysctl kern.version > kern.version=OpenBSD 5.5-current (MERCURY.MP) #2: Sat Jun 21 08:24:41 > CEST 2014 > [email protected]:/usr/src/sys/arch/amd64/compile/MERCURY.MP > > late June (waiting for 5.6). > > Now my problem is a certain WRT router, I'm supposed to be able to reach > it with an IPv6 address made of its MAC address, but ndp doesn't > recognize it, and it should. While this was on my laptop which is off > (it is 5.5) right now I can duplicate what i saw in a tcpdump on my > workstation and it goes a little something like this: > > mercury# ping6 fe80::1234:56ff:fe78:9abc%em0 > PING6(56=40+8+8 bytes) fe80::beee:7bff:fedd:2e5a%em0 --> > fe80::1234:56ff:fe78:9abc%em0 > 18:43:39.537023 bc:ee:7b:dd:2e:5a 33:33:ff:78:9a:bc 86dd 86: > fe80::beee:7bff:fedd:2e5a > ff02::1:ff78:9abc: icmp6: neighbor sol: who > has fe80::1234:56ff:fe78:9abc(src lladdr: bc:ee:7b:dd:2e:5a) [icmp6 > cksum ok] (len 32, hlim 255) > ^C > --- fe80::1234:56ff:fe78:9abc%em0 ping6 statistics --- > 2 packets transmitted, 0 packets received, 100.0% packet loss > > mercury# 18:43:40.532913 bc:ee:7b:dd:2e:5a 33:33:ff:78:9a:bc 86dd 86: > fe80::beee:7bff:fedd:2e5a > ff02::1:ff78:9abc: icmp6: neighbor sol: who > has fe80::1234:56ff:fe78:9abc(src lladdr: bc:ee:7b:dd:2e:5a) [icmp6 > cksum ok] (len 32, hlim 255) > 18:43:41.532915 bc:ee:7b:dd:2e:5a 33:33:ff:78:9a:bc 86dd 86: > fe80::beee:7bff:fedd:2e5a > ff02::1:ff78:9abc: icmp6: neighbor sol: who > has fe80::1234:56ff:fe78:9abc(src lladdr: bc:ee:7b:dd:2e:5a) [icmp6 > cksum ok] (len 32, hlim 255) > > notice the 33:33:ff for the beginning mac address, I can not find the > code for that grepping through /sys/netinet6/* where would that be > defined? Or is this a brokenness that we encountered with this article > concerning vlan(4): > > http://permalink.gmane.org/gmane.os.openbsd.misc/212691 > > Is it really a cause with 5.5, and fixed in 5.6, or is it normal > behaviour of ndp to add 33:33:ff, a multicast address after all but I'm > unsure if it's proper due to lack of knowledge of IPv6 and ND6. > > Regards, > > -peter >
To save someone doing the work, I have found where that is defined, in /sys/net/if_ethersubr.c, sorry for the noise. it's legitimate then and I'm still trying to figure out why I can't reach the WRT router. Thanks! -peter
