Re: gif problems in -STABLE
On Sat, Dec 30, 2006 at 02:56:35AM +0100, Dimitry Andric wrote: For some reason, the ifconfig command now fails to create the proper routing table entries. With the 2006-11-03 kernel, if I configure my gif0 tunnel as follows: ifconfig gif0 create ifconfig gif0 213.154.244.69 193.109.122.244 ifconfig gif0 inet6 2001:7b8:2ff:146::2 2001:7b8:2ff:146::1 prefixlen 128 route add -inet6 default 2001:7b8:2ff:146::1 Apart from the two IPv4 endpoint addresses you also assign two IPv6 addresses with prefixlen 128 to the gif0 interface? Looks weird to me... Try this configuration in /etc/rc.conf instead: ipv6_defaultrouter=2001:7b8:2ff:146::1 gif_interfaces=gif0 gifconfig_gif0=213.154.244.69 193.109.122.244 ipv6_ifconfig_gif0=2001:7b8:2ff:146::2 prefixlen 127 This syntax works for my setup (and matches reality - gif0 is a tunnel with two IPv4 endpoints). I have just tested it with RELENG_6 as of today. Regards, Brix -- Henrik Brix Andersen [EMAIL PROTECTED] pgplDzlfW5rfe.pgp Description: PGP signature
Re: gif problems in -STABLE
Henrik Brix Andersen wrote: On Sat, Dec 30, 2006 at 02:56:35AM +0100, Dimitry Andric wrote: For some reason, the ifconfig command now fails to create the proper routing table entries. With the 2006-11-03 kernel, if I configure my gif0 tunnel as follows: ifconfig gif0 create ifconfig gif0 213.154.244.69 193.109.122.244 ifconfig gif0 inet6 2001:7b8:2ff:146::2 2001:7b8:2ff:146::1 prefixlen 128 route add -inet6 default 2001:7b8:2ff:146::1 Apart from the two IPv4 endpoint addresses you also assign two IPv6 addresses with prefixlen 128 to the gif0 interface? Looks weird to me... This is the syntax my IPv6 ISP (sixxs.net) specifies, here: http://www.sixxs.net/faq/connectivity/?faq=ossetupos=freebsd If you Google around for IPv6 gif tunnel setup information, you'll see this particular syntax many times. It used to work for several years, but if someone can point out an obvious error in it, please let me know. :) There's also a similar syntax in the FreeBSD handbook, though it doesn't mention the prefixlen at all: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-ipv6.html#AEN39629 Moreover, the syntax mentioned in the handbook doesn't even work: # ifconfig gif0 create # ifconfig gif0 gif0: flags=8010POINTOPOINT,MULTICAST mtu 1280 # ifconfig gif0 tunnel 213.154.244.69 193.109.122.244 # ifconfig gif0 inet6 alias 2001:7b8:2ff:146::2 2001:7b8:2ff:146::1 ifconfig: ioctl (SIOCAIFADDR): Invalid argument The particular thing that I observe, is that when you configured the gif tunnel with: ifconfig gif0 inet6 2001:7b8:2ff:146::2 2001:7b8:2ff:146::1 prefixlen 128 the kernel *used* to automagically create two routing table entries: 2001:7b8:2ff:146::1 link#6UHLgif0 2001:7b8:2ff:146::2 link#6UHL lo0 but as of some date between 2006-11-03 and 2006-12-29, this behaviour changed, and it now only creates *one* routing table entry: 2001:7b8:2ff:146::2 link#6UHL lo0 And I'm only asking why this was changed. Try this configuration in /etc/rc.conf instead: ipv6_defaultrouter=2001:7b8:2ff:146::1 gif_interfaces=gif0 gifconfig_gif0=213.154.244.69 193.109.122.244 ipv6_ifconfig_gif0=2001:7b8:2ff:146::2 prefixlen 127 Doesn't work for me; if I specify prefixlen 127 instead of 126, I get: ping6: UDP connect: No route to host when trying to ping the other endpoint of the tunnel, and the required routing table entry is *not* present: Internet6: Destination Gateway Flags Netif Expire ::/96 ::1 UGRSlo0 ::1 ::1 UHL lo0 :::0.0.0.0/96 ::1 UGRSlo0 2001:7b8:2ff:146::2 link#6UHL lo0 = 2001:7b8:2ff:146::2/127 link#6UC gif0 ... In my case, the 2001:7b8:2ff:146::2/127 route is also not enough to reach 2001:7b8:2ff:146::1; you really have to use a prefixlen of 126 for that. Cheers, Dimitry ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: gif problems in -STABLE
On Sat, 30 Dec 2006, Dimitry Andric wrote: Hi, I just updated one of my machines from RELENG_6 as of 2006-11-03, to RELENG_6 as of 2006-12-29. This caused the IPv6 tunnel which this box uses, which had been doing fine for months, to suddenly stop working. Reverting to my 2006-11-03 kernel restored the tunnel again, so my ISP could be ruled out. :) The symptoms are that the IPv6 default gateway cannot be reached, and you'll get ping6: sendmsg: No route to host when you try to ping it. For some reason, the ifconfig command now fails to create the proper routing table entries. With the 2006-11-03 kernel, if I configure my gif0 tunnel as follows: I can confirm my setup with Hurricane Electric also started failing at some point: gif_interfaces=gif0 gifconfig_gif0=AA.BB.CC.DD 64.71.128.83 ipv6_defaultrouter=:::::1C ipv6_ifconfig_gif0=:::::1D :::::1C prefixlen 128 I needed to add the following to restore the old (working) behavior: ipv6_static_routes=defroute ipv6_route_defroute=:::::1C -interface gif0 Sean -- [EMAIL PROTECTED] ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: gif problems in -STABLE
Sean C. Farley wrote: I just updated one of my machines from RELENG_6 as of 2006-11-03, to RELENG_6 as of 2006-12-29. This caused the IPv6 tunnel which this box uses, which had been doing fine for months, to suddenly stop working. ... For some reason, the ifconfig command now fails to create the proper routing table entries. With the 2006-11-03 kernel, if I configure my gif0 tunnel as follows: I can confirm my setup with Hurricane Electric also started failing at some point: ... I needed to add the following to restore the old (working) behavior: ipv6_static_routes=defroute ipv6_route_defroute=:::::1C -interface gif0 By doing some nice bisection debugging, I've narrowed the problem down to this specific commit: http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet6/nd6.c#rev1.48.2.16 If you revert this change, tunnel configuration will work as before again. I'm now investigating the diff itself, to see if I can find an error in there anywhere... :) Cheers, Dimitry ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to [EMAIL PROTECTED]
gif problems in -STABLE
Hi, I just updated one of my machines from RELENG_6 as of 2006-11-03, to RELENG_6 as of 2006-12-29. This caused the IPv6 tunnel which this box uses, which had been doing fine for months, to suddenly stop working. Reverting to my 2006-11-03 kernel restored the tunnel again, so my ISP could be ruled out. :) The symptoms are that the IPv6 default gateway cannot be reached, and you'll get ping6: sendmsg: No route to host when you try to ping it. For some reason, the ifconfig command now fails to create the proper routing table entries. With the 2006-11-03 kernel, if I configure my gif0 tunnel as follows: ifconfig gif0 create ifconfig gif0 213.154.244.69 193.109.122.244 ifconfig gif0 inet6 2001:7b8:2ff:146::2 2001:7b8:2ff:146::1 prefixlen 128 route add -inet6 default 2001:7b8:2ff:146::1 I get the following entries in the routing table: Internet6: Destination Gateway Flags Netif Expire ::/96 ::1 UGRSlo0 = default 2001:7b8:2ff:146::1 UGSgif0 ::1 ::1 UHL lo0 :::0.0.0.0/96 ::1 UGRSlo0 2001:7b8:2ff:146::1 link#6UHLgif0 2001:7b8:2ff:146::2 link#6UHL lo0 ... If I use the 2006-12-29 kernel, the routing table after exactly the same sequence of commands is: Internet6: Destination Gateway Flags Netif Expire ::/96 ::1 UGRSlo0 = default 2001:7b8:2ff:146::1 UGSgif0 ::1 ::1 UHL lo0 :::0.0.0.0/96 ::1 UGRSlo0 2001:7b8:2ff:146::2 link#6UHL lo0 ... So, for some reason, the 2001:7b8:2ff:146::1 entry is not automatically created anymore. Of course, you could add this manually, but it's rather strange that this behaviour has changed. After some Googling, I found this thread about -current, which seems to describe approximately the same problem: http://lists.freebsd.org/pipermail/freebsd-current/2006-December/067830.html However, the thread seems to have no real conclusion as to what the cause or proper solution is. There are two possible solutions mentioned, though: 1) Using something like: ipv6_defaultrouter=::1 -ifp gif0 This doesn't work for me, unless I set the prefixlen for the whole gif0 tunnel to 64; but in that case I don't need the ::1 -ifp stuff either. 2) Using something like: ipv6_ifconfig_gif0=2001:7b8:2ff:146::2 prefixlen 126 This does work, though I find it strange that such functionality is changed so shortly before a release. :) Does anyone have a clue where this changed behaviour comes from, or where in the source tree I should look to find the commit that caused it? Maybe it would be nicer to revert to the previous behaviour for 6.2-RELEASE, since it will cause many non-working tunnels when people upgrade. Or otherwise at least put a big notice in UPDATING or the release notes. :) Cheers, Dimitry ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to [EMAIL PROTECTED]
