Re: F10 - dIsabling IPv4 addressing

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Robert Moskowitz <rgm@xxxxxxxxxxxxxxx> writes:
> When I save ifcfg-eth0, NetworkManager reports the network is down.
> If I start eth0 in NetworkManager, I get IPv4 addresses.  If I use
> ifdown to bring eth0 back down, then ifup, I don't get IPv4 addresses,
> only my IPv6 global assignment.
>
> What do I have to do to get the desired behaviour?

You'll be doing yourself a favor if you ditch NetworkMangler and use
the traditional network infrastructure.  

    chkconfig network on
    chkconfig NetworkManager off

(Then run system-config-network and make sure your interfaces are
configured the way you want then.  Save and reboot.)

    root@poblano # service network restart
    Shutting down interface eth1:                              [  OK  ]
    Shutting down loopback interface:                          [  OK  ]
    Bringing up loopback interface:                            [  OK  ]
    Bringing up interface eth1:                                [  OK  ]
    root@poblano # 
    root@poblano # ifconfig
    eth1      Link encap:Ethernet  HWaddr XX:XX:XX:XX:XX:XX  
              inet6 addr: 2001:5a8:4:7d0:2e0:XXff:feXX:8dXX/64 Scope:Global
              inet6 addr: fe80::2e0:XXff:feXX:8dXX/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:23 errors:0 dropped:0 overruns:0 frame:0
              TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:2514 (2.4 KiB)  TX bytes:3164 (3.0 KiB)
              Interrupt:19 

    lo        Link encap:Local Loopback  
              inet addr:127.0.0.1  Mask:255.0.0.0
              inet6 addr: ::1/128 Scope:Host
              UP LOOPBACK RUNNING  MTU:16436  Metric:1
              RX packets:4273 errors:0 dropped:0 overruns:0 frame:0
              TX packets:4273 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:2326924 (2.2 MiB)  TX bytes:2326924 (2.2 MiB)

First off, you'll want to make sure your /etc/resolv.conf has some
ipv6 nameservers listed.

Now I doubt the system is capable of running as a pure ipv6 host
unless someone put in the effort to flush out the last few ipv4
dependencies.  We do have ~3 decades of ipv4 dependencies wired into
the code. There are no doubt lots of programs that were never updated
to use ipv6 sockets.

> Oh, I am logged in as root, so I don't have to futz with permissions
> to fiddle with the interface.

Sigh.  

-wolfgang
-- 
Wolfgang S. Rupprecht              http://www.full-steam.org/  (ipv6-only)
         You may need to config 6to4 to see the above pages.

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