On 22.06.2018 19:38, Viktor Dukhovni wrote: > I just upgraded to 11.1-p10, forgetting I had patched my kernel, > and the stf0 interface flapping was back, with IPv6 connectivity > disappearing every other second or so (interface shows as "tentative" > and outgoing connections fail with "can't assign requested address"). > > Appied the same patch and rebooted, and the problem is gone. Here's > the patch again: > > Index: sys/net/if_stf.c > --- sys/net/if_stf.c (revision 333375) > +++ sys/net/if_stf.c (working copy) > @@ -722,6 +722,7 @@ > } > > ifp->if_flags |= IFF_UP; > + ifp->if_drv_flags |= IFF_DRV_RUNNING; > break; > > case SIOCADDMULTI: > Hi,
Your change looks reasonable due to IPv6 DAD procedure does check for presence of IFF_DRV_RUNNING flag. But actually it seems the right solution should be disabling DAD for if_stf(4) interface. IPv6 DAD requires that given interface should be multicast capable, but for if_stf(4) it is not true. Will it help if you use `ifconfig stf0 inet6 no_dad` before assigning IPv6 address? -- WBR, Andrey V. Elsukov
signature.asc
Description: OpenPGP digital signature
