Date: Sun, 09 Apr 2017 08:29:27 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 218508] Tunneling and aliases using the tun device, reusing a destination address works with IPv4, but not IPv6 Message-ID: <bug-218508-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=218508 Bug ID: 218508 Summary: Tunneling and aliases using the tun device, reusing a destination address works with IPv4, but not IPv6 Product: Base System Version: 11.0-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: reezer@reezer.org I can create a tun device by using: ifconfig tun0 create ifconfig tun 10.1.2.0 196.2.3.4 ifconfig tun alias 196.2.3.3 196.2.3.4 ifconfig up This works great and allows me to use the 10.1.2.0 and have it tunneled over the second (aliased) tunnel when I set up the correct route using /sbin/route add -net 10.0.0.0/8 -iface tun0. I have this setup, using IPv6 only working as it is supposed to. To explain what I am am actually achieving with this: In the background I am using BGP over a one-to-one VPN software using the tunnel interface. Doing the same thing on IPv6, however doesn't work when I add an alias, using the same destination address twice: ifconfig tun0 inet6 fdaa:abc:abc:abc::1 fe80::111:0 prefixlen /128 ifconfig tun0 inet6 alias fe80::111:1 fe80::111:0 prefixlen /128 ifconfig: ioctl (SIOCAIFADDR): File exists Using another destination address this works however. Since this works on IPv4 I'd expect it to work here as well. -- You are receiving this mail because: You are the assignee for the bug.
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