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* Walter Dnes: |
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> I prefer man pages to rambling Youtube videos. |
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As you wish: man ndp ;-) |
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> given that SLAAC and DHCPV6 assign random addresses how do I |
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> accomplish the equivalant of "scp <filename> i660:." |
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The world according to 'argon', a MacBook Pro I am using right now: |
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argon $ ndp -a |
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Neighbor Linklayer Address Netif Expire St Flgs Prbs |
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fd67:1111:2222::10 (incomplete) en0 expired N |
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fd67:1111:2222:0:86a:e0ce:2999:7c4 4c:57:ca:dc:8d:5e en0 23h59m20s S |
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fd67:1111:2222:0:882:c472:d94f:66e3 20:c9:d0:45:ee:af en0 permanent R |
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fd67:1111:2222:0:a96:d7ff:fe8b:69dd 8:96:d7:8b:69:dd en0 23h53m10s S R |
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fd67:1111:2222:0:553c:9719:22e0:af74 4c:57:ca:dc:8d:5e en0 23h52m30s S |
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fd67:1111:2222:0:9d4c:8017:ae:c5af 20:c9:d0:45:ee:af en0 permanent R |
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argon.local (incomplete) lo0 permanent R |
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fe80::1%en0 (incomplete) en0 expired N |
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fe80::a96:d7ff:fe8b:69dd%en0 8:96:d7:8b:69:dd en0 36s R R |
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silver.local 4c:57:ca:dc:8d:5e en0 23h59m10s S |
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argon.local 20:c9:d0:45:ee:af en0 permanent R |
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ferrum.local 3c:7:54:7d:50:c1 en0 23h28m48s S |
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argon.local (incomplete) utun0 permanent R |
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argon.local (incomplete) utun1 permanent R |
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[... more addresses removed ...] |
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argon $ ssh ferrum.local |
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Last login: Fri Nov 29 01:06:17 2019 from 192.168.235.17 |
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ferrum $ who |
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ralph ttys000 Nov 29 01:45 (fe80::1444:5bd9:f47c:663c%en0) |
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The ndp dump on 'argon' shows expired entries, entries that are still |
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valid for the listed time, and permanent entries. As you can see, I can |
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use 'ferrum.local' to identify a particular machine and login. There is |
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also 'silver', which happens to be my smartphone. There is even an entry |
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'fd67:1111:2222::10' which represents a static IPv6 address I used for |
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testing earlier, with fd67:1111:2222 being my obfuscated ULA prefix. |
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IPv6 clients are chatting link-local without user intervention, to say |
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"I'm here" and to ask "Who is near me?". Routers actively advertise |
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their services. After a little while, clients start to get an idea of |
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their surroundings without an admin holding their hand. IPv6 is pretty |
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nifty in that regard. |
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-Ralph |
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