Split Multi-Link Trunking/Routed Split Multi-Link Trunking
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Overview: Split Multi-Link Trunking (SMLT), a Nortel Networks extension to IEEE 802.3ad, improves on the level of Layer 2 resiliency by providing nodal protection in addition to link failure protection and flexible bandwidth scaling. It achieves this by allowing edge switches using IEEE 802.3ad to dual home to two SMLT aggregation switches. It is important to note that SMLT is transparent to attached devices supporting IEEE 802.3ad. With Routed Split Multi-Link Trunking (RSMLT), Nortel Networks introduces a feature that allows rapid failover for core topologies by providing an active-active router concept to core SMLT networks.