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| Subject: | Re: DoS of LAN via D-Link switches |
|---|---|
| Date: | Wed, 30 Mar 2005 16:19:36 -0600 |
From: Frank Bures [mailto:lisfrank@chem.toronto.edu] Sent: Tuesday, March 29, 2005 4:41 AMIn my opinion, a switch should be immune to this admittedly insane manipulation. Otherwise, one can DoS the entire network just by shorting two RJ-45 network outlets in one's office together.
I believe what you are describing is officially called a bridge loop. A
bridge loop occurs when a switch, or stack of switches are plugged into
themselves. The result is that the switches report the same MAC address
at multiple ports. The solution to this is called Spanning Tree
Protocol. STP is a set of algorithms that help switches remove
redundant MAC entries.
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