That will not work with the gateway providing the address NATing it. On
Cisco, bpdu-guard will block this, though.
Bruce Osborne
Network Engineer – Wireless Team
IT Network Services
(434) 592-4229
LIBERTY UNIVERSITY
Training Champions for Christ since 1971
From: Ian McDonald
I've never known a NAT gateway to send BPDUs out of its WAN port, and so
I've never seen BPDU guard work in this scenario.
When these home gateways first came out, the cable ISPs only allowed one
computer to be used on their service. So, the gateways are very good at
emulating a single computer.
I posted something very similar a month or so ago. I feel your pain – as a
small school with limited manpower, we have the same issue. So far I haven’t
seen a good answer – we quickly got rid of all of the wireless routers, but
there are so many devices that do not plug into the network that
To me, wireless printers are absolutely the worst offenders. If they could be
eliminated, the rest may be manageable. In one version of the dorm world I
envision, I’d do something like this:
1. Develop a per dorm central printing solution that was free (as long as
it wasn’t abused),
1) We have this. We have printers in labs on every other floor of
residence halls. We even have a web-based solution where students can print
directly to the printer from their personal PCs without messing with drivers,
etc. We discourage personal printers, yet students (or their parents)
