Date: Fri, 08 Dec 2006 22:54:41 +0800 From: gnn@freebsd.org To: Joe Marcus Clarke <marcus@freebsd.org> Cc: current@freebsd.org Subject: Re: Problem with gif and IPv6 in -CURRENT Message-ID: <m24ps6bfpq.wl%gnn@neville-neil.com> In-Reply-To: <4578995B.4090305@FreeBSD.org> References: <4578995B.4090305@FreeBSD.org>
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At Thu, 07 Dec 2006 17:44:43 -0500, Joe Marcus Clarke wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > I am running: > > FreeBSD jclarke-pc 7.0-CURRENT FreeBSD 7.0-CURRENT #81: Thu Dec 7 > 16:06:32 EST 2006 marcus@jclarke-pc:/usr/obj/usr/src/sys/JCLARKE-PC > i386 > > And I am trying to get a gif IPv6 tunnel up to a Cisco router. I can > get this to work on a 6.2-PRERELEASE server, but the -CURRENT machine > always claims there is no route to the far end of the point-to-point > link. Here is my config: > > # ifconfig gif0 create > # ifconfig gif0 tunnel 172.18.173.17 10.29.100.75 > # ifconfig gif0 inet6 3ffe:604::2 3ffe:604::1 prefixlen 128 > # ifconfig gi0 > gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1280 > tunnel inet 172.18.173.17 --> 10.29.100.75 > inet6 fe80::211:11ff:fe10:461e%gif0 prefixlen 64 scopeid 0x4 > inet6 3ffe:604::2 --> 3ffe:604::1 prefixlen 128 > > This looks good, and I can ping my local 3ffe:604::2 address. However, > when I ping 3ffe:604::1, I get: > > ping6: UDP connect: No route to host > > It's not lying. I don't have a route to 3ffe:604::1: > > # netstat -nr > ... > ::/96 ::1 UGRS > lo0 > ::1 ::1 UHL > lo0 > ::ffff:0.0.0.0/96 ::1 UGRS > lo0 > 2003:a02::/64 link#1 UC > em0 > 2003:a02::1 00:11:11:10:46:1e UHL > lo0 > 3ffe:604::2 link#4 UHL > lo0 > fe80::/10 ::1 UGRS > lo0 > fe80::%em0/64 link#1 UC > em0 > fe80::211:11ff:fe10:461e%em0 00:11:11:10:46:1e UHL > lo0 > fe80::%lo0/64 fe80::1%lo0 U > lo0 > fe80::1%lo0 link#3 UHL > lo0 > fe80::%gif0/64 link#4 UC > gif0 > fe80::211:11ff:fe10:461e%gif0 link#4 UHL > lo0 > ff01:1::/32 link#1 UC > em0 > ff01:3::/32 ::1 UC > lo0 > ff01:4::/32 link#4 UC > gif0 > ff02::/16 ::1 UGRS > lo0 > ff02::%em0/32 link#1 UC > em0 > ff02::%lo0/32 ::1 UC > lo0 > ff02::%gif0/32 link#4 UC > gif0 > > The IPv4 address on the other end of the tunnel is reachable, and the > Cisco router has no problems finding a route to the FreeBSD machine. > Here is the config from the Cisco side: > > interface Tunnel1 > no ip address > load-interval 30 > ipv6 address 3FFE:604::1/126 > ipv6 enable > tunnel source 10.29.100.75 > tunnel destination 172.18.173.17 > tunnel mode ipv6ip > > Why isn't the other end of the point-to-point tunnel being instantiated > in the routing table? If I take this exact config to a 6.2 box, this > works just fine, and the far end of the PTP link is instantiated in the > routing table. Thanks for any clues you can provide. I'm not sure for the reason for that but I find that with this in my rc.conf my PTP comes up just fine: #IPv6 Config gif_interfaces="gif0" gifconfig_gif0="124.39.153.88 211.14.6.238" ipv6_enable="YES" ipv6_network_interfaces="bge0" ipv6_ifconfig_bge0="2001:2f0:104:8081::1 prefixlen 64" ipv6_defaultrouter="::1 -ifp gif0" ipv6_gateway_enable="YES" It might be the "ipv6_defaultrouter" line above that makes this all work. Best, George
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