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Date:      Tue, 18 Dec 2001 11:14:26 +0100 (CET)
From:      Attila Nagy <bra@fsn.hu>
To:        net@freebsd.org
Subject:   FEC and VLAN trunking
Message-ID:  <Pine.LNX.4.40.0112181105520.4341-100000@scribble.fsn.hu>

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Hello,

I tried the FEC patch from http://people.freebsd.org/~wpaul/FEC/ on a
4-STABLE machine with two fxp cards connecting to a HP 4000M switch.
The switch supports .1q tagging and FEC.

I did the following:

ifconfig fec0 up (the fec0 interface stands from fxp0 and fxp1)
ifconfig vlan0 192.168.5.2 vlan 5 vlandev fec0 up

Now I can't ping the machine 192.168.5.1 which is in the same VLAN (VLAN
ID 5). If I do this without VLANs everything works correctly, so I can use
fec0 as intended.

tcpdump on fec0 (tcpdump -i fec0) shows that the machine gets the VLANs
and tcpdump can identify each one with their ID. So on fec0 I get the
correct traffic of several VLANs but I can not do anything besides that.

If I ping 192.168.5.2 (the machine with FEC) from 192.168.5.1 I can see
the ICMP echo requests coming in on the correct VLAN on fec0, but the
machine does not respond to them.

Is it possible to do VLAN trunking on a FEC interface?

Thanks,
--------------------------------------------------------------------------
Attila Nagy                                    e-mail:  Attila.Nagy@fsn.hu
Budapest Polytechnic (BMF.HU)                   @work: +361 210 1415 (194)
H-1084 Budapest, Tavaszmezo u. 15-17.           cell.: +3630 306 6758



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