[Bug 208067] Wrong MAC addresses reported by ndp

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208067

            Bug ID: 208067
           Summary: Wrong MAC addresses reported by ndp
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: kozlov.sergey.404 at gmail.com

Created attachment 168302
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=168302&action=edit
Log from 11-CURRENT

The ndp utility report wrong MAC addresses on 11-CURRENT snapshot from
2016-03-08.

On the same machine:
10.2:
root at u0824:~ # ndp -na
Neighbor                             Linklayer Address  Netif Expire    S Flags
fe80::e2db:55ff:fefd:3045%igb0       e0:db:55:fd:30:45   igb0 permanent R

11.0:
root at u0824:~ # ndp -an
Neighbor                             Linklayer Address  Netif Expire    S Flags
fe80::e2db:55ff:fefd:3045%igb0       20:f0:66:26:00:f8   igb0 permanent R

Full logs are attached.

Isolation notes:
- Wrong MACs reported for local and remote hosts
- Tested on igb and ixl drivers
- IPv4 stack (arp utility) is not affected
- Despite the wrong MAC addresses are reported, IPv6 traffic is working OK


Sponsored by: Intel Corporation

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