nema5pic
vi-hell
clippie

IPv6 101


address

  1. 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


####
#### test cmd 2021.06
####

# ping6
# ssh -6


# https://serverfault.com/questions/1007184/how-to-check-ipv6-address-via-command-line
# ip -6 addr show scope global
# curl -6 https://ifconfig.co                    # return what web server see of my ip.  didnt work for bofh or casa

# telnet -6 lunaria.dyn.berkeley.edu
# telnet -6 2607:f140:1:0:18af:466c:c1e:c947 22  #  lunaria # try this for 2021.0608
# ssh       2607:f140:1:0:18af:466c:c1e:c947     #  works w/in lunaria

# dig -6 TXT +short o-o.myaddr.l.google.com @ns1.google.com
# dig -t aaaa +short myip.opendns.com @resolver1.opendns.com


2607:f140:1:0:357a:70dd:6b82:65ff       domingo # 2021.0603
2607:f140:1:0:18af:466c:0c1e:c947       lunaria # 2021.0608
                   0019:b919:0ffa       lunaria mac
2607:f140:e000:1:9a03:9bff:fea2:b5f4    dtn.brc.berkeley.edu # 2021.0608

2601:0641:0400:0261:0208f:9599:d1f4:233a      comcast  z
                          0011:a300:c50b



lunaria, test-ipv6.com says no ipv6 access, (below is old info from 2020):

                             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

..





Copyright info about this work

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike2.5 License. Pocket Sys Admin Survival Guide: for content that I wrote, (CC) some rights reserved. 2005,2012 Tin Ho [ tin6150 (at) gmail.com ]
Some contents are "cached" here for easy reference. Sources include man pages, vendor documents, online references, discussion groups, etc. Copyright of those are obviously those of the vendor and original authors. I am merely caching them here for quick reference and avoid broken URL problems.



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