Patent ID: 8230498
Filing Date: 2012-07-24
Classification: H04L

Abstract:
1. A method comprising: establishing a first virtual talk group (VTG) that includes a plurality of endpoints, the plurality of endpoints including a first endpoint and a second endpoint, the first VTG having a first multicast address; monitoring traffic associated with the first VTG; determining when a denial of service (DOS) attack is indicated by the traffic; identifying at least one rogue endpoint responsible for the DOS attack when it is determined that the DOS attack is indicated by the traffic; notifying the first endpoint and the second endpoint to participate in a dynamic switchover from the first VTG to a second VTG when it is determined that the DOS attack is indicated by the traffic, the second VTG having a second multicast address; and establishing the second VTG to include the first endpoint and the second endpoint, but not to include the at least one rogue endpoint, wherein establishing the first VTG includes providing a list of alternative multicast addresses to the plurality of endpoints, the second multicast address being included in the list of alternative multicast addresses.