Gus Wirth wrote:
In order to test at home I'll need to figure out some way of generating
802.1Q packets and spewing them out an interface. Have any
recommendations for that? Maybe I should learn about vconfig first.
OpenWRT uses it in home routers to set up the switch but since it "just
works" I haven't paid much attention to it.
You can setup an interface with vconfig and it will tag/untag the
packets for you as they go in and out. So you can plug the switch into
physical eth0 on the machine which you want to generate traffic and
create an interface with vconfig like so:
vconfig add eth0.2 2
Now any traffic sent out of eth0.2 will have 802.1q tags on it for VLAN 2.
Make sure the switch port the machine is plugged into is in 802.1q
trunking mode and has the vlan number in question enabled on that port
Then you can use another machine on the same physical network which is
also plugged into a trunk port with that vlan enabled on it to receive
the packets on the physical eth0 and use vconfig:
vconfig add eth0.2 2
and now if you use iptraf on eth0.2 you will get untagged packets.
If you don't have a fancy vlan capable switch at home where you want to
do this testing you could probably just direct connect two machines with
a crossover ethernet and send 802.1q tagged packets direct.
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