From owner-freebsd-net  Thu Aug 16 13:33:46 2001
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To: freebsd-net@freebsd.org
Cc: Mike Smith <msmith@freebsd.org>, hogsett@csl.sri.com
Subject: Question : vlan -> fec -> fxp
Date: Thu, 16 Aug 2001 13:33:01 -0700
From: Mike Hogsett <hogsett@csl.sri.com>
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Previously I had been posting to freebsd-stable regarding my
questions, but this seems to be a better list for this.

First let me explain my goal, then I will explain the problem.

My goal is to use two fxp's "bonded" together using the fast ether
channel netgraph module ( from http://people.freebsd.org/~wpaul/FEC/ )
then create n vlan interfaces with the fec0 interface as the parent
dev for the vlan interfaces.

     fxp0  fxp1 
     \________/
         |
        fec0
       / | \
      /  |  \
     /   |   \
  vlan0 vlan1 vlanN

I have built and installed a new kernel with "pseudo-device vlan 1"
and have built and installed the fec module.

I have confirmed that fxp{0,1} interfaces work stand alone.

I have confirmed that the fec0 interface works (using
"set_mode_inet").

I have confirmed that the vlan interfaces work when the parent device
is either fxp0 or fxp1.

What does not work is when the fec0 interface is the parent for the
vlan interfaces.

Here is the setup : 

 ngctl mkpeer fec dummy fec
 ngctl msg fec0: add_iface '"fxp0"'
 ngctl msg fec0: add_iface '"fxp1"'
 ngctl msg fec0: set_mode_mac #(I have also tried using "set_mode_inet")
 ifconfig fxp0 up
 ifconfig fxp1 up
 ifconfig fec0 up
 ifconfig vlan0 192.168.1.10 netmask 255.255.255.0 vlan 505 vlandev fec0 up mtu 1500

Nothing complains.  The interfaces all look good in ifconfig, mtu's are correct, 
all are "UP".

When pinging this machine from another machine on the lan here is the
behavior that I get :

Running "tcpdump -ni vlan0" shows the arp requests and the arp replies
Running "tcpdump -ni fec0" shows the 802.1q tagged arp reqests and the arp replies
Running "tcpdump -ni fxp{0,1}" shows the 802.1q tagged arp requests

So the packets climb the chain but seem to enter a blackhole back down...

Suggestions?

 - Michael Hogsett

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