Date: Sat, 5 Nov 2005 14:39:13 -0800 From: Sean McNeil <sean@mcneil.com> To: Hajimu UMEMOTO <ume@freebsd.org> Cc: current@freebsd.org Subject: Re: recent MFC code to 6-STABLE kills ipv6 Message-ID: <8427EC93-6788-4659-B769-3703FF2AAA9A@mcneil.com> In-Reply-To: <ygehdaqhnnv.wl%ume@mahoroba.org> References: <1131161768.8571.9.camel@server.mcneil.com> <ygehdaqhnnv.wl%ume@mahoroba.org>
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On Nov 5, 2005, at 11:58 AM, Hajimu UMEMOTO wrote: > Hi, > >>>>>> On Fri, 04 Nov 2005 19:36:08 -0800 >>>>>> Sean McNeil <sean@mcneil.com> said: > > sean> My IMAP server used to work perfectly fine with IPv6 > connections from > sean> evolution. Today, there was some MFCd code that has killed > it. I can > sean> no longer log into my imap server with IPv6. Investigating, > I find that > sean> the interface I have tied to stf0 will not respond. > > When was your working kernel built? I had a working kernel that was built perhaps 3-4 days ago. It is the changes MFCd in the last couple of days that broke things. > sean> ping6 does NOT work for > sean> fe80::203:6dff:fe1a:b19b%dc0 > sean> 2002:18c7:2d36:0:203:6dff:fe1a:b19b > sean> 2002:18c7:2d36:: > > It seems an IPv6 operation for dc0 is disabled entirely. Don't you > see an error message from your kernel like following? > > dc0: possible hardware address duplication detected, disable IPv6 No, nothing like that in any logs. I can't see how there could suddenly be a duplication of hardware addresses. I agree, though, that IPv6 is disabled for dc0. Some change in the kernel has caused this. Two things to note: The dc0 interface has option VLAN_MTU. Don't know why. The dc0 interface is my gateway with ipv4mapping. Here are the relevant rc.conf settings... /etc/rc.conf:ipv6_defaultrouter="2002:c058:6301::" /etc/rc.conf:ipv6_enable="YES" /etc/rc.conf:ipv6_gateway_enable="YES" /etc/rc.conf:ipv6_prefix_dc0="2002:18c7:2d36:0000" /etc/rc.conf:ipv6_prefix_sk0="2002:18c7:2d36:0001" /etc/rc.conf:ipv6_router_enable="YES" /etc/rc.conf:stf_interface_ipv4addr="24.199.45.54" /etc/rc.conf.d/ip6addrctl:ipv6_enable="YES" /etc/rc.conf.d/ip6fw:ipv6_firewall_enable="YES" /etc/rc.conf.d/ip6fw:ipv6_firewall_type="/etc/fw/rc.firewall6.rules" /etc/rc.conf.d/ip6fw:ipv6_firewall_quiet="YES" /etc/rc.conf.d/network_ipv6:ipv6_ipv4mapping="YES" /etc/rc.conf.d/route6d:ipv6_router_enable="YES" looking at ip6fw show indicated nothing is being denied. Cheers, Sean
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