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In order to provide device redundancy, most enterprise networks are designed with redundant connections between aggregation (core) switches and user access switches. For networks with just one aggregation switch, MLT provides redundancy and load sharing.
SMLT improves the reliability of a layer 2 (L2) network operating between a building's user access switches and the network center aggregation switch by providing:
An Inter Switch Trunk (IST) operates between the aggregation switches and allows them to exchange information. This permits the rapid detection of any faults and the modification of forwarding paths.
Note:
Although SMLT is primarily designed for layer 2 networks, it also provides benefits for layer 3 networks.
In an SMLT network, 8000 Series switches are typically used as follows:
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| Note: An edge (layer 2) switch must support MLT to allow communication with an SMLT aggregation switch. |
The 8100 Switch uses an MLT algorithm for load-sharing among MLT link aggregation switches. In the event of failure, traffic is rapidly diverted from one MLT link to another.
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