Abstract: It is disclosed a method and a detector capable of resolving unicast flooding in a layer 2 broadcast domain. The method is performed in a detector having a medium access control (MAC) address. The detector receives a first flooded packet having a destination MAC address differing from the detector's MAC address. The detector sends a message to a node in the layer 2 broadcast domain, wherein the type of the node is determined based on the destination MAC address of the first flooded packet and/or based on whether a destination Internet protocol (IP) address of the first flooded packet is an address within the layer 2 broadcast domain. It is advantageous that the message is adapted to trigger the node to announce its MAC address within the layer 2 broadcast domain, causing the unicast flooding to be resolved, by which consumption of available bandwidth is reduced.

Abstract: A method and a first device (110) of a switched network (100), for managing data frames received, at a first port, from a second device (120) are disclosed. The first device (110) handles the first port and a second port for transfer of data frames between the first and second devices (110, 120). The first device (110) is addressable by a Media Access Control address, “MAC address”, associated with the first port. The first device (110) receives (201), from the second device (120), at least one data frame at the second port. The first device (110) sends (202), on the first port, a message including the MAC address associated with the first port.

Abstract: A routing device and a further routing device of a switched network form a virtual router and are addressable by a virtual Media Access Control (MAC) address. The further routing device receives at least one data frame and sends, to the routing device, a request instructing the routing device to send an alert message for conveying information about the virtual MAC address throughout the switched network.

Abstract: It is disclosed a method and a detector capable of resolving unicast flooding in a layer 2 broadcast domain. The method is performed in a detector having a medium access control (MAC) address. The detector receives a first flooded packet having a destination MAC address differing from the detector's MAC address. The detector sends a message to a node in the layer 2 broadcast domain, wherein the type of the node is determined based on the destination MAC address of the first flooded packet and/or based on whether a destination Internet protocol address of the first flooded packet is an address within the layer 2 broadcast domain. It is advantageous that the message is adapted to trigger the node to announce its MAC address within the layer 2 broadcast domain, causing the unicast flooding to be resolved, by which consumption of available bandwidth is reduced.

Abstract: A routing device and a further routing device of a switched network form a virtual router and are addressable by a virtual Media Access Control (MAC) address. The further routing device receives at least one data frame and sends, to the routing device, a request instructing the routing device to send an alert message for conveying information about the virtual MAC address throughout the switched network.

Abstract: A method and a routing device (110) for managing data frames as well as a method and a further routing device (120) for managing data frames are disclosed. The routing device (110) is addressable by a virtual Media Access Control address, “virtual MAC address”, for assignment to routers. The routing device (110) sends (205) a data frame comprising a source MAC address field, which includes a unicast MAC address of the routing device (110). The routing device (110) sends (208) a message including information about the virtual MAC address. The routing device (110) is configured to send, in a periodic manner, a periodic message for conveying information about the virtual MAC address throughout the switched network (100). In another embodiment, the further routing device (120) receives (201) at least one data frame. The further routing device (120) sends (202) a request which instructs the routing device (110) to send an alert message for conveying information about the virtual MAC address.

Abstract: A method and a routing device (110) for managing data frames as well as a method and a further routing device (120) for managing data frames are disclosed. The routing device (110) is addressable by a virtual Media Access Control address, “virtual MAC address”, for assignment to routers. The routing device (110) sends (205) a data frame comprising a source MAC address field, which includes a unicast MAC address of the routing device (110). The routing device (110) sends (208) a message including information about the virtual MAC address. The routing device (110) is configured to send, in a periodic manner, a periodic message for conveying information about the virtual MAC address throughout the switched network (100). In another embodiment, the further routing device (120) receives (201) at least one data frame. The further routing device (120) sends (202)a request which instructs the routing device (110) to send an alert message for conveying information about the virtual MAC address.

Abstract: A method and a first device (110) of a switched network (100), for managing data frames received, at a first port, from a second device (120) are disclosed. The first device (110) handles the first port and a second port for transfer of data frames between the first and second devices (110, 120). The first device (110) is addressable by a Media Access Control address, “MAC address”, associated with the first port. The first device (110) receives (201), from the second device (120), at least one data frame at the second port. The first device (110) sends (202), on the first port, a message including the MAC address associated with the first port.

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 a link failure between the active host and the switch, or a malfunction of the active host, and determining a backup host to take over. The method comprises associating the IP and the MAC address of the active host to the determined backup host to take over, and triggering a MAC learning process in the switch.