Abstract:
The embodiments of the present invention relate to a method in a transmitting node; a method in a receiving node; a transmitting node and a receiving node in an IP network employing Internet security. The receiving node comprises a Receiving Unit, a Processing Unit and a Transmitting Unit. When an IP packet is received, the Processing Unit is adapted to derive a Security Association and a Traffic Class associated with the IP packet. The Processing unit is also adapted to maintain one anti-replay window for each Traffic Class within the Security Association and to determine if a sequence number of the IP packet is within the anti-replay window of the Traffic Class and is not a duplicate of an earlier received packet. If said sequence number is not within the anti-replay window or is a duplicate of an earlier received packet, the packet is dropped.
Abstract:
A method in a host arrangement for communicating with a terminal connected to an IP communication network. The arrangement comprises at least two hosts, one operating as active host and the remaining at least one host operating as backup host(s). The arrangement is connected to the IP communication network by means of a switch, wherein each host of the arrangement is connected to the switch by means of an individual link, the active host being associated with an IP and a MAC address. The method comprises detecting (110) a link failure between the active host and the switch, or a malfunction of the active host; and determining (120) a backup host to takeover. The method comprises associating (130) the IP and the MAC address of the active host to the determined backup host to take over; and triggering (140) a MAC learning process in the switch.