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Date: Fri, 31 Aug 2012 15:04:44 -0400
From: Brad Plank <bplank@gta.com>
Organization: Global Technology Associates, Inc.
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Subject: VLAN and ARP table
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VLAN interfaces no longer show up in "arp -an", in FreeBSD 9.x, however,
the VLAN appears to be fully functional.  Any ideas?


# ifconfig
em0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 15=
00
options=3D9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM>
         ether 08:00:27:b7:11:3b
         inet 10.20.13.104 netmask 0xffff0000 broadcast 10.20.255.255
         inet6 fe80::a00:27ff:feb7:113b%em0 prefixlen 64 scopeid 0x1
         inet6 2620:3f:8000:1:d::104 prefixlen 64
         nd6 options=3D21<PERFORMNUD,AUTO_LINKLOCAL>
         media: Ethernet autoselect (1000baseT <full-duplex>)
         status: active
lo0: flags=3D8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
         options=3D600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
         inet6 ::1 prefixlen 128
         inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
         inet 127.0.0.1 netmask 0xff000000
         nd6 options=3D21<PERFORMNUD,AUTO_LINKLOCAL>
vlan0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu =
1500
         options=3D3<RXCSUM,TXCSUM>
         ether 08:00:27:b7:11:3b
         inet 172.16.200.104 netmask 0xffffff00 broadcast 172.16.200.255
         nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
         media: Ethernet autoselect (1000baseT <full-duplex>)
         status: active
         vlan: 115 parent interface: em0

# arp -an
? (10.20.13.112) at c8:60:00:c3:24:19 on em0 expires in 1181 seconds=20
[ethernet]
? (10.20.13.9) at 00:12:3f:20:b9:4c on em0 expires in 908 seconds [ethern=
et]
? (10.20.13.104) at 08:00:27:b7:11:3b on em0 permanent [ethernet]
? (10.20.13.110) at 00:90:fb:02:db:e8 on em0 expires in 448 seconds=20
[ethernet]
? (10.20.13.109) at 08:00:27:7c:19:d5 on em0 expires in 663 seconds=20
[ethernet]
? (10.20.254.254) at 00:00:5e:00:01:33 on em0 expires in 1063 seconds=20
[ethernet]

Regards,

Brad Plank


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