Hello,
Userland layer-2 tunneling devices allocated through the TUNTAP driver
(drivers/net/tun.c) have a type of ARPHRD_NONE, and have no link-layer
address. The kernel complains at regular interval when IPv6 Privacy
extension are enabled because it can't find an hardware address :
Dec 29 11:02:04 auguste kernel: __ipv6_regen_rndid(idev=cb3e0c00):
cannot get EUI64 identifier; use random bytes.
IPv6 Privacy extensions should probably be disabled on that sort of
device. They won't work anyway. If userland wants a more usual
Ethernet-ish interface with usual IPv6 autoconfiguration, it will use a
TAP device with an emulated link-layer and a random hardware address
rather than a TUN device.
As far as I could fine, TUN virtual device from TUNTAP is the very only
sort of device using ARPHRD_NONE as kernel device type.
Signed-off-by: RÃmi Denis-Courmont <rdenis@xxxxxxxxxxxxxxxx>
--- a/net/ipv6/addrconf.c.orig 2004-12-29 10:50:27.000000000 +0100
+++ b/net/ipv6/addrconf.c 2004-12-29 10:50:41.000000000 +0100
@@ -372,6 +372,7 @@
ndev->regen_timer.data = (unsigned long) ndev;
if ((dev->flags&IFF_LOOPBACK) ||
dev->type == ARPHRD_TUNNEL ||
+ dev->type == ARPHRD_NONE ||
dev->type == ARPHRD_SIT) {
printk(KERN_INFO
"Disabled Privacy Extensions on device
%p(%s)\n",
--
RÃmi Denis-Courmont
http://www.simphalempin.com/home/
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