Tygolmaran ERS config -if exit. Retrieved 3 Sep For each packet that needs to be transmitted, one of the physical links is selected based on a load-balancing algorithm usually involving a hash function operating on the source and destination Media Access Control MAC address information. From Wikipedia, the free encyclopedia. A loop would result, however, with this feature all frames from the edge switch will be discarded until the switch is reconfigured.
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For each packet that needs to be transmitted, one of the physical links is selected based on a load-balancing algorithm usually involving a hash function operating on the source and destination Media Access Control MAC address information.
For real-world network traffic this generally results in an effective bandwidth for the logical link equal to the sum of the bandwidth of the individual physical links. A general limitation of standard link aggregation, MLT or EtherChannel is that all the physical ports in the link aggregation group must reside on the same switch. The split may be at one or at both ends of the MLT. If both ends of the link are split, the resulting topology is referred to as an "SMLT square" when there is no cross-connect between diagonally opposite aggregation switches, or an "SMLT mesh" when each aggregation switch has a SMLT connection with both aggregation switches in the other pair.
If only one end is split, the topology is referred to as an SMLT triangle. The only requirement is that IEEE In general, normal network traffic does not traverse the IST unless this is the only path to reach a host which is connected only to the peer switch.
By ensuring all devices have SMLT connections to the aggregation switches, traffic never needs to traverse the IST and the total forwarding capacity of the switches in the cluster is also aggregated. Play media SMLT The use of SMLT not only allows traffic to be load-balanced across all the links in an aggregation group but also allows traffic to be redistributed very quickly in the event of link or switch failure. In general the failure of any one component results in a traffic disruption lasting less than half a second normal less than millisecond   making SMLT appropriate in environments running time- and loss-sensitive applications such as voice and video.
In a network using SMLT, it is often no longer necessary to run a spanning tree protocol of any kind since there are no logical bridging loops introduced by the presence of the IST. This eliminates the need for spanning tree reconvergence or root-bridge failovers in failure scenarios which causes interruptions in network traffic longer than time-sensitive applications are able to cater for.
Depending on the specific routing protocol, this convergence time can cause network interruptions ranging from seconds to minutes. This high speed recovery is required by many critical networks where outages can cause loss of life or very large monetary losses in critical networks. Distributed multi-link trunking[ edit ] Avaya Distributed Multi-Link Trunking DMLT between 2 stacked switches to an ERS switch Distributed multi-link trunking DMLT or distributed MLT is a proprietary computer networking protocol designed by Nortel Networks , and now owned by extreme networks ,  used to load balance the network traffic across connections and also across multiple switches or modules in a chassis.
DMLT allows the ports in a trunk MLT to span multiple units of a stack of switches or to span multiple cards in a chassis, preventing network outages when one switch in a stack fails or a card in a chassis fails. DSMLT allows the ports in a trunk to span multiple units of a stack of switches or to span multiple cards in a chassis, preventing network outages when one switch in a stack fails or one card in a chassis fails.
US , Fite, Jr. Should any one switch, port, or more than one link fail, the DSMLT technology will automatically redistribute traffic across the remaining links. Automatic redistribution is accomplished in less than half a second typically less than milliseconds  so no outage is noticed by end users.
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