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Broadcast, unknown-unicast and multicast traffic (BUM traffic) [1] is network traffic transmitted using one of three methods of sending data link layer network traffic to a destination of which the sender does not know the network address. This is achieved by sending the network traffic to multiple destinations on an Ethernet network. [2]
The forward and reverse paths used for unicast and multicast traffic in an IEEE 802.1aq network are symmetric. This symmetry permits the normal Ethernet Continuity Fault Messages (CFM) IEEE 802.1ag to operate unchanged for SPBV and SPBM and has desirable properties with respect to time distribution protocols such as Precision Time Protocol ...
In computer networking, telecommunication and information theory, broadcasting is a method of transferring a message to all recipients simultaneously. Broadcasting can be performed as a high-level operation in a program, for example, broadcasting in Message Passing Interface, or it may be a low-level networking operation, for example broadcasting on Ethernet.
In practice, broadcast packets are not forwarded everywhere on a network, but only to devices within a broadcast domain, making broadcast a relative term. Less common than broadcasting, but perhaps of greater utility and theoretical significance, is multicasting , where a packet is selectively duplicated and copies delivered to each of a set of ...
A threat agent which has control of a device connected to an Ethernet switch can use MAC flooding to attack the switch's CAM table. If the table fills up, other traffic is treated as broadcast, unknown-unicast and multicast traffic and is forwarded to all ports making it available to the attacker.
When a network is experiencing unicast flooding, network performance may be degraded. Here is a graph of a bridge before and after adjusting the size of the bridge address cache: [1] 80% of the frames were flooded out never to be received by the destination address, while 20% was valid traffic.
In computer networking, network traffic control is the process of managing, controlling or reducing the network traffic, particularly Internet bandwidth, e.g. by the network scheduler. [1] It is used by network administrators, to reduce congestion, latency and packet loss. This is part of bandwidth management.
A reverse-path forwarding check and other checks are performed on multi-destination frames to further control potentially looping traffic. The first RBridge that a unicast frame encounters in a campus, RB1, encapsulates the received frame with a TRILL header that specifies the last RBridge, RB2, where the frame is decapsulated.