Monday, March 15, 2010

Network Dictionary — VTP Bomb

November 9, 2009 by Greg Ferro · 4 Comments 

VTP is VLAN Trunking Protocol which propag­ates VLAN num­bers through­out a net­work. When a switch act­ing as VTP server with a higher revi­sion num­ber of the VTP data­base is inser­ted into the net­work it can “bomb” the network.

The higher VTP data­base num­ber will cause VLAN inform­a­tion to be over­writ­ten in all switches. Because the ver­sion of the latest data­base is usu­ally from a switch in the lab which is noth­ing like the live net­work, your entire net­work effect­ively “dies”.

This is known as a “VTP Bomb”, espe­cially is per­formed maliciously.

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