> Date: Mon, 2 Mar 2009 16:35:33 +0700
> From: o...@cs.ait.ac.th
> To: faiz...@hotmail.com
> CC: fbsd.questi...@rachie.is-a-geek.net; freebsd-questions@freebsd.org;
> fb...@a1poweruser.com
> Subject: Re: Bridging-(How to test and verify that bridging is enabled)
>
> Hi,
>
> > > Are you using properly crossed cables?
> > Isnt it enough check for the that two linux can ping each other..
>
> Yes and no. You must used crossed Ethernet cable between your FreeBSD
> bridge and each of your Linux boxes.
Frankly i am not sure about the cables type but they works PC to PC
connectivity.
> As someone suggested, what is ifconfig saying on the FreeBSD box? You
> should see that both sk0 and sk1 have a status: active. Else it means
> you have a cable problem.
sk0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu
1500
options=b<RXCSUM, TXCSUM, VLAN_MTU
ether 00:0a:5e:1a:69:25
media: Ethernet autoselect (1000baseTX <full-duplex, flag0, flag1, flag2>)
status: active
sk1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu
1500
options=b<RXCSUM, TXCSUM, VLAN_MTU
ether 00:0a:5e:1a:67:ee
media: Ethernet autoselect (1000baseTX <full-duplex, flag0, flag1, flag2>)
status: active
here is the ifconfig output for the bridge interface:
bridge0: flags=8943<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=b<RXCSUM, TXCSUM, VLAN_MTU
ether 0a:54:d7:7e:aa:66
inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
id 00:00:00:00:00:00 priortiy 32768 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
>
> An example of ifconfig for a bridge (FreeBSD 4.xx):
>
> fxp0: flags=89c3<UP,BROADCAST,RUNNING,NOARP,PROMISC,SIMPLEX,MULTICAST> mtu
> 1500
> ether 00:07:e9:xx:xx:xx
> media: Ethernet autoselect (100baseTX <full-duplex>)
> status: active
> fxp1: flags=89c3<UP,BROADCAST,RUNNING,NOARP,PROMISC,SIMPLEX,MULTICAST> mtu
> 1500
> ether 00:07:e9:yy:yy:yy
> media: Ethernet autoselect (100baseTX <full-duplex>)
> status: active
>
> Once you make sure that both interfaces on your FreeBSD box are up and
> running, you can procced to the next step:
>
> > > On the FreeBSD box=2C you can tcpdump(8) and see the packets moving:
> > > tcpdump -i sk0 and tcpdump -i sk1 and you will see the pick request
> > > and ping echo packets.
> > it says arp: who has 192.168.0.4 tell 192.168.0.5
>
> You'd need to give more information about your connection; something
> like:
>
> Linux 192.168.0.4 <---> sk0 FreeBSD sk1 <---> Linux 192.168.0.5
>
> And you should also specify if ou where tcpdump'ing on interface sk0
> or sk1. Once your bridge is working, you will get the same thing for
> tcpdump on both interfaces.
ok here is the detail:
Linux 192.168.0.5 <---> sk0 FreeBSD sk1 <---> Linux 192.168.0.4
ping from 192.168.0.5 to 192.168.0.4
tcpdump (on freeBSD) tcpdump -i sk0 RESULT arp: who has 192.168.0.4 tell
192.168.0.5
ping from 192.168.0.4 to 192.168.0.5
tcpdump (on freeBSD) tcpdump -i sk1 RESULT arp: who has 192.168.0.5 tell
192.168.0.4
tcpdump -i bridge0 gives nothing...
> Olivier
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