VLAN interfaces that have a parent interface configured with an IP
address do not show up in the arp table. If the VLAN's parent interface
does not have an IP address, it will show up in the arp table.
[Notice the output from ifconfig below, to duplicate this issue.]
#ifconfig
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=9b<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=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect (1000baseT <full-duplex>)
status: active
vlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=3<RXCSUM,TXCSUM>
ether 08:00:27:b7:11:3b
inet 172.16.200.104 netmask 0xffffff00 broadcast 172.16.200.255
nd6 options=29<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 1182 seconds
[ethernet]
? (10.20.13.9) at 00:12:3f:20:b9:4c on em0 expires in 1104 seconds
[ethernet]
? (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 669 seconds
[ethernet]
? (10.20.13.109) at 08:00:27:7c:19:d5 on em0 expires in 1199 seconds
[ethernet]
? (10.20.254.254) at 00:00:5e:00:01:33 on em0 expires in 1179 seconds
[ethernet]
Brad
On 9/1/2012 2:45 PM, Eugene M. Zheganin wrote:
Hi.
On 01.09.2012 1:04, Brad Plank wrote:
VLAN interfaces no longer show up in "arp -an", in FreeBSD 9.x, however,
the VLAN appears to be fully functional. Any ideas?
They do.
arp -an
? (86.109.196.1) at 00:21:1b:d1:14:1b on vlan818 expires in 1192
seconds [vlan]
? (89.250.213.121) at d4:ca:6d:2a:aa:11 on vlan104 expires in 906
seconds [vlan]
? (89.250.210.65) at d4:ca:6d:2a:aa:11 on vlan104 expires in 1198
seconds [vlan]
? (128.127.144.7) at 00:50:56:a3:48:59 on vlan23 expires in 1188
seconds [vlan]
? (128.127.144.5) at 00:00:5e:00:01:0b on vlan23 expires in 1194
seconds [vlan]
? (128.127.144.2) at 00:02:b3:e9:8d:0e on vlan23 expires in 380
seconds [vlan]
? (128.127.144.1) at 00:1a:64:21:8e:80 on vlan23 expires in 1199
seconds [vlan]
? (192.168.9.43) at b8:c7:5d:91:8e:30 on vlan21 expires in 1176
seconds [vlan]
? (192.168.9.16) at 94:3a:f0:9f:a1:0b on vlan21 expires in 1103
seconds [vlan]
? (192.168.9.19) at 90:c1:15:1b:c9:f3 on vlan21 expires in 1102
seconds [vlan]
Eugene.
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