[Bug 193488] New: [re] RTL8168F ignores incoming multicast packets

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Tue Sep 9 14:39:13 UTC 2014


            Bug ID: 193488
           Summary: [re] RTL8168F ignores incoming multicast packets
           Product: Base System
           Version: 10.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: josh at greyage.org

The RTL8168F ignores incoming multicast packets. This breaks SLAAC for IPv6
because router advertisements are multicast. The problem also affects minidlna
(UPnP media server). While the interface is in PROMISC mode multicast packets
are processed.

This bug is very similar to Bug 125024 although on a different device. [1]

Steps to reproduce:

1. Attach RTL8168F interface to network with working SLAAC-capable router.

2. Set up rc.conf according to handbook. [2]

3. Run "ifconfig re0" and note that only link-local address is set.

4. Run "tcpdump -i re0" and concurrently "rtsol re0". (This puts the device in
promiscuous mode, allowing router advertisement to be received.)

5. Run "ifconfig re0" again and note that gloal address has been acquired.

[1] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=125024
[2] https://www.freebsd.org/doc/handbook/network-ipv6.html#idp84149040

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