Date: Mon, 12 Jan 2009 04:20:14 +0900 (JST) From: Hiroki Sato <hrs@FreeBSD.org> To: stable@FreeBSD.org Subject: IPv6 routing on 7.1R Message-ID: <20090112.042014.205677175.hrs@allbsd.org>
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Hi,
I noticed an odd behavior regarding IPv6 after upgrading my 7.0R box
to 7.1R. The situation and symptom are the following:
1. The box has two NICs. One has an address 2001:0db8:1::1/64 (NIC
A), and another has 2001:0db8:2::1/64 (NIC B). These addresses
are assigned manually ($ipv6_ifconfig in rc.conf).
2. RA is periodically sent to the network 2001:0db8:1::1/64 (NIC A)
by a router on the subnet. The RA includes a source link-layer
address option only.
When setting net.inet6.ip6.accept_rtadv=1 in this configuration, I
expected the box assigns an autoconf IPv6 address (prefix
2001:0db8:1::/64 + EUI64) to NIC A and an default route based on
source link-layer address in the RA packet. Actually, these two were
done as expected. However, after addresses are assigned, routes for
NIC B disappeared from the routing table. More specifically, a
cloning route "2001:0db8:2::1/64 -> link#2" was removed for some
reason.
Is this an expected behavior? IIRC, 7.0R does not remove the route
and I think it is strange. It works fine if a box has a single NIC,
though.
--
| Hiroki SATO
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