On Thu, May 19, 2011 at 10:06 PM, JD <jd1008@xxxxxxxxx> wrote: > On 05/19/11 18:45, Tom H wrote: >> On Thu, May 19, 2011 at 8:57 PM, JD<jd1008@xxxxxxxxx> wrote: >>> On 05/19/11 17:41, Tom H wrote: >>>> >>>> To the OP: Do you have a "/etc/sysconfig/network-scripts/ifcfg-wlan0" >>>> and a "/etc/sysconfig/network-scripts/ifcfg-wlan0:0"? What are their >>>> contents? >>> I have no /etc/sysconfig/network-scripts/ifcfg-wlan0:0 >>> >>> $ cat /etc/sysconfig/network-scripts/ifcfg-wlan0: >>> DEVICE=wlan0:0 >>> IPV6INIT=no >> >> Why do you have "DEVICE=wlan0:0" in >> "/etc/sysconfig/network-scripts/ifcfg-wlan0"? > > I think that is a remnant. Thank for pointing it out. > I had completely overlooked it. But, it is nevertheless, > harmless. You're welcome. It's harmless in your case, except for the weird ifconfig and netstat outputs. If you were using dhcp, it'd be even more harmless (only wlan0 would be brought up with a dhcp ipv4 address and a link-local ipv6 address) or harmful (neither wlan0 nor wlan0:0 would be brought up). >>>>> It is a valid IPv6 interface. >>>> It's valid but it isn't routable. It's the equivalent of an ipv4 >>>> 169.254.x.y address. >>> >>> Yes. ifconfig always prints this even when ip6 is disabled. >> >> No, if ipv6 is disabled, no ipv6 address is assigned to any interface. > > I do not see in any of my conf files, nor in services > where I have enabled ipv6. Take a look at "CONFIG_IPV6" in "/boot/config...". > But I think there are other internal interfaces/modules that, [do > not/are not configured to] > go out over the LAN, that use ipv6: such as: > bridge,ah6,esp6,xfrm6_mode_beet,xfrm6_mode_tunnel,ipcomp6,xfrm6_tunnel,tunnel6 > > But I see your point because I thought that it was completely disabled. > Now I wonder if any of the loadable modules that get loaded, depend on. > ipv6 being enabled. >>>>> >>>>> The fact that IPv6 layer was disabled on the subnet (as JD clarified it later), >>>>> does not change anything. Once again, the type of configured interface wlan0 >>>>> is of interest to me, that is IPv6-type. >>>> >>>> Since wlan0:0 has a ipv6 address, ipv6 must not be disabled. >>> >>> It really IS disabled. Look at the contents of my ifcfg-wlan0 above. >>> It says IPV6INIT=no >> >> "IPV6INIT=no" doesn't disable ipv6; it's used by >> "/etc/sysconfig/network-scripts/ifup-ipv6" to determine whether to >> configure ipv6 for that interface. If ipv6.ko isn't prevented from >> loading through "/etc/modprobe.conf" or a conf file in >> "/etc/modprobe.conf.d/", an interface will be assigned an fe80 ipv6 >> address. > > Correct. I had overlooked that altogether. > As I asked above, I wonder if some service will break > if I black list the ipv6 modules. No idea but possible; exim (on Debian, never tried it on Fedora) craps out if you disable ipv6 globally without disabling ipv6 in exim's own configuration. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
