Pekka Savola schrieb: > On Tue, 29 Aug 2006, David Miller wrote: >> From: YOSHIFUJI Hideaki <[EMAIL PROTECTED]> >> Date: Tue, 29 Aug 2006 18:34:26 +0900 (JST) >> >>> Further analysis is needed, but one idea is to skip >>> addrconf_dev_config() if !(dev->flags & IFF_MULTICAST). >> >> Yes, it is logical because without multicast IPV6 cannot >> work correctly. >> >> But from another perspective (I assume these bridged Xen devices use >> ARPHRD_ETHER, do they?) a device with ARPHRD_ETHER and cleared >> IFF_MULTICAST flag seems potentially problematic. How many other >> things break over such a device? > > It's not obvious that IFF_MULTICAST is good enough. IMHO, you should be > able to run addrconf on non-multicast interfaces as well (e.g., > point-to-point interfaces, tunnels in particular).
Hmm, at least on RHEL4 (2.6.9): 1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue 2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000 3: eth1: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000 4: sit0: <NOARP> mtu 1480 qdisc noop 5: [EMAIL PROTECTED]: <POINTOPOINT,NOARP,UP> mtu 1480 qdisc noqueue 6: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP> mtu 1492 qdisc pfifo_fast qlen 3 8: [EMAIL PROTECTED]: <NOARP,UP> mtu 1480 qdisc noqueue And contributed from FC5: 5: vmnet8: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000 7: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,10000> mtu 1500 qdisc pfifo_fast qlen 100 ppp0, tun0 has IFF_MULTICAST set, so not an issue. > It seems that current code already excludes IFF_NOARP interfaces though. So 6-in-4 tunnels are already except. Don't wonder about Flag "10000", missing support in "ip", already reported https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=202199 and fixed in rawhide. Just my 2 cents, Peter -- Dr. Peter Bieringer http://www.bieringer.de/pb/ GPG/PGP Key 0x958F422D mailto:[EMAIL PROTECTED] Deep Space 6 Co-Founder and Core Member http://www.deepspace6.net/ OpenBC http://www.openbc.com/hp/Peter_Bieringer/ Personal invitation to OpenBC http://www.openbc.com/go/invita/3889 - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
