How to prevent VLAN Hopping in Cisco Switches
Posted on Apr 17, 2008 under Cisco, Security | No CommentTags:802.1Q Cisco Double-Tagging Security-Exploit switch-spoofing Tunnel vlan VLAN-Hopping
A malicious user can easily gain access to data on another VLAN to which he is not authorised to access using VLAN hopping. A VLAN Hoping attack can be launched by using a Switch Spoofing or Double Tagging of 802.1q trunking protocol. To have a quick insight into VLAN Hopping, click here.
You can prevent VLAN Hopping in Cisco Switches as follows:

