[mythtv] Q about networking after recent networking improvements in master

Peter Bennett pgbennett at comcast.net
Sun Apr 16 18:36:12 UTC 2017

On 04/16/2017 01:16 PM, Bill Meek wrote:
> $ ifconfig
> enp4s0    Link encap:Ethernet  HWaddr 1c:6f:65:4a:85:15
>           inet addr:  Bcast: Mask:
>           inet6 addr: fd14:4bf7:d5bf:0:1e6f:65ff:fe4a:8515/64 
> Scope:Global
>           inet6 addr: fd14:4bf7:d5bf:0:4c4c:afde:fb87:7981/64 
> Scope:Global
>           inet6 addr: fdf9:a66:2cd8:1::221/64 Scope:Global
>           inet6 addr: fd14:4bf7:d5bf:0:b52e:f578:ce6b:8ceb/64 
> Scope:Global
>           inet6 addr: fe80::1e6f:65ff:fe4a:8515/64 Scope:Link
>           inet6 addr: fd14:4bf7:d5bf:0:d3bd:3a12:6018:90cb/64 
> Scope:Global
> fd14... = magic to me, fdf9... = the ULA I made up and configured. 
> Yesterday,
> the fd14:4bf7:d5bf:0/64 prefix was fdec:somethingElseIdon'tRemember. 
> Perhaps
> they're some kind of stale temporary address. Just don't know. But if 
> it's
> not a reliable kernel feature, it's of no value to Peter's question.
> [my ISP only provides GUAs to their business customers and based on my 
> last
>  conversation with them, they have no plans to start]

It seems like you have an over-enthusiastic router, which created 4 ULA 
addresses for 1 server.
Mine, on the other hand, generates none, but I do get a GUA from Comcast:

enp0s25   Link encap:Ethernet  HWaddr bc:5f:f4:f8:a8:a2
           inet addr:  Bcast: Mask:
           inet6 addr: 2601:183:101:18dc:5e04:34b5:7af4:6714/64 Scope:Global
           inet6 addr: fe80::1c98:f936:7f9e:3afb/64 Scope:Link
           inet6 addr: fd3d:63f5:6a89:1::10/64 Scope:Global

The fd3d is the one I create and assign in the script I mentioned before.

If your ISP does not give you Global addresses then you cannot access 
IPV6 web sites. They seem to think only businesses need that??? That's 

Comcast seems to be on the ball in that respect. They give an IPv6 range 
to users, and their websites and their email servers all are IPv6 


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