ot: who to report a bug in if_tap to?
Aryeh Friedman
aryeh.friedman at gmail.com
Tue Aug 13 17:43:07 UTC 2013
It is connected to the physical nic via a switch (no intermediate
routers). DHCP doesn't even attempt because there is no carrier on
tap0:
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO>
ether 30:85:a9:ec:24:95
inet 10.0.10.10 netmask 0xffffff00 broadcast 10.0.10.255
inet6 fe80::3285:a9ff:feec:2495%em0 prefixlen 64 scopeid 0x1
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
re0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=8209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,LINKSTATE>
ether 90:f6:52:00:40:e6
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect (100baseTX <half-duplex>)
status: no carrier
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
tap0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=80000<LINKSTATE>
ether 00:bd:0c:6e:02:00
inet6 fe80::2bd:cff:fe6e:200%tap0 prefixlen 64 scopeid 0x4
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect
status: no carrier
root at petitecloud:/home/aryeh # if
if ifconfig ifmcstat
root at petitecloud:/home/aryeh # ifconfig bridge0 create
root at petitecloud:/home/aryeh # ifconfig bridge0 addm em0 addm tap0
root at petitecloud:/home/aryeh # ifconfig tap0 10.0.10.3
root at petitecloud:/home/aryeh # ifconfig -a
em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric
0 mtu 1500
options=42098<VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWTSO>
ether 30:85:a9:ec:24:95
inet 10.0.10.10 netmask 0xffffff00 broadcast 10.0.10.255
inet6 fe80::3285:a9ff:feec:2495%em0 prefixlen 64 scopeid 0x1
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
tap0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST>
metric 0 mtu 1500
options=80000<LINKSTATE>
ether 00:bd:0c:6e:02:00
inet6 fe80::2bd:cff:fe6e:200%tap0 prefixlen 64 scopeid 0x4
inet 10.0.10.3 netmask 0xff000000 broadcast 10.255.255.255
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect
status: no carrier
bridge0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
ether f6:3c:f0:0f:b9:48
nd6 options=1<PERFORMNUD>
id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
root id 00:00:00:00:00:00 priority 0 ifcost 0 port 0
member: tap0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 4 priority 128 path cost 2000000
member: em0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 1 priority 128 path cost 200000
root at vcloud:/home/aryeh # dhclient tap0
tap0: no link .............. giving up
On Tue, Aug 13, 2013 at 1:19 PM, Peter Grehan <grehan at freebsd.org> wrote:
> Hi Aryeh,
>
>
>> It appears that a bridged if_tap does not understand DHCP on the
>> physical NIC... who do I report this to?
>
>
> First, what's your configuration ? Is the DHCP server connected via the
> physical NIC ? What does a tcpdump show ?
>
> later,
>
> Peter.
>
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