Sys Admin Pocket Survival Guide

IPv6 101

address

Any address starting with "::", "fc", "fd", or "fe" are unable to work with the public IPv6 Internet.

fe80::                                  # ipv6 link local, autogenerated (like IPv5 169.254...) can't go thru router, but usable in same subnet

fe80::ec4:7aff:fe75:c9b0                # bofh    ipv6 link local 
          0cc4:7a75:c9b0                # bofh    mac
fe80::221:ccff:fed3:3d41                # cueball ipv6 link local
          0021:ccd3:3d41                # cueball mac 

ping6 fe80::ec4:7aff:fe75:c9b0%2        # works (same host or another host on same subnet).  %2 is interface id as per "ip a"

https://askubuntu.com/questions/546405/ping-adress-ipv6


lunaria, test-ipv6.com says no ipv6 access :

                             0019:b919:0ffa mac
    inet6 2607:f140:1:4:149e:a69a:62d0:c507/64 scope global temporary deprecated dynamic 
    inet6 2607:f140:1:4:58da:a619:68b3:a4aa/64 scope global temporary deprecated dynamic 
    inet6 2607:f140:1:4:398c:b98:86b2:c6d8/64  scope global temporary deprecated dynamic 
    inet6 2607:f140:1:4:bd82:93c7:ad69:691b/64 scope global temporary deprecated dynamic 
    inet6 2607:f140:1:4:f553:7c99:1da9:bda/64  scope global temporary deprecated dynamic 
    inet6 2607:f140:1:4:b1cb:55cd:3c8a:dd5f/64 scope global temporary deprecated dynamic 
    inet6 2607:f140:1:4:34:aee6:552b:3b9e/64   scope global temporary deprecated dynamic 
    inet6 2607:f140:1:4:8e98:2463:5141:d862/64 scope global deprecated mngtmpaddr noprefixroute dynamic 
    inet6 fe80::e668:bc67:eb2f:cc49/64         scope link

...

...

Commands/Troubleshooting

Reference

tba

Performance

..

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