VLANs and routing
fox at verio.net
Fri Jun 15 16:45:17 UTC 2007
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Peter Jeremy <peterjeremy at optushome.com.au> wrote:
> > But the (somewhat weird) requirements are that the vlan interface on
> > machine1 shouldn't have assigned IP address, but the second one
> > should.
> > Is this kind of setup even supported?
> I don't see how it could be if machine1 is an IP endpoint: In order
> to transmit a packet, it needs to put a source IP address into the
> packet - which virtually always comes from the interface.
When originating a packet, that is the case. But a forwarded packet
already has a source address, which can be left unchanged. As long as
routing is working (ARP is not needed, destination is clear, etc), the
intermediate interface need not have an IP.
David DeSimone == Network Admin == fox at verio.net
"It took me fifteen years to discover that I had no
talent for writing, but I couldn't give it up because
by that time I was too famous. -- Robert Benchley
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