On 2012-04-20, Joost Roeleveld <jo...@antarean.org> wrote:
> On Thursday, April 19, 2012 04:12:35 PM Michael Mol wrote:
>> On Thu, Apr 19, 2012 at 4:01 PM, Alex Schuster <wo...@wonkology.org> wrote:
>> > Michael Mol writes:
>> >> On Thu, Apr 19, 2012 at 3:40 PM, Alex Schuster <wo...@wonkology.org>
>> >>
>> >> wrote:
>> >> > New output:
>> >> > eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
>> >> > inet 192.168.2.42 netmask 255.255.255.0 broadcast
>> >> > 192.168.2.255 inet6 fe80::be5f:f4ff:fe19:ad18 prefixlen 64 scopeid
>> >> > 0x20<link>
>> >> >
>> >> > ether bc:5f:f4:19:ad:18 txqueuelen 1000 (Ethernet)
>> >>
>> >> There it is.
>> >
>> > Wow. Now I feel really stupid. Because I am. I have no idea why I have
>> > overlooked this.
>> >
>> > Sorry for the noise!
>>
>> I didn't see it right away, either. I found it by noticing your MAC in
>> your old output, and searched for a substring of it in your new
>> output.
>>
>> Incidentally, you can derive it from your IPv6 LL address, but that's
>> a bit of a roundabout way, and may not work if you've disabled IPv6.
>
> How do you derive it?
> I don't see the mac-address in the inet6 address.
$ ip addr show dev eth1
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UP qlen 1000
link/ether 00:16:17:84:a7:b3 brd ff:ff:ff:ff:ff:ff
inet 10.0.0.1/8 brd 10.255.255.255 scope global eth1
inet 192.168.250.1/24 brd 192.168.250.255 scope global eth1
inet 169.254.1.1/16 brd 169.254.255.255 scope global eth1
inet6 fe80::216:17ff:fe84:a7b3/64 scope link
valid_lft forever preferred_lft forever
fe80::0216:17ff:fe84:a7b3
0216 17 84 a7b3
xor 0200 00 00 0000
-------------------
0016 17 84 a7b3
00:16:17:84:a7:b3
And that's the interfaces MAC address.
See RFC2464 Sections 4 and 5
The tricky part is that you invert bit 1 of the first byte of the MAC
address.
--
Grant Edwards grant.b.edwards Yow! Someone in DAYTON,
at Ohio is selling USED
gmail.com CARPETS to a SERBO-CROATIAN
