Link Capacity Adjustment Scheme orLCAS is a method to dynamically increase or decrease thebandwidth ofvirtual concatenated containers. The LCASprotocol is specified inITU-T G.7042.

It allows on-demand increase or decrease of the bandwidth of the virtual concatenated group in ahitless manner. This bringsbandwidth-on-demand capability for data clients like Ethernet when mapped intoTDM containers.

LCAS is also able to temporarily remove failed members from the virtual concatenation group. A failed member will automatically cause a decrease of the bandwidth and after repair the bandwidth will increase again in a hitless fashion. Together with diverse routing this provides survivability of data traffic without requiring excess protection bandwidth allocation.

• [ Benefits and Implementation of Link Capacity Adjustment Scheme (LCAS) in Ethernet over SONET/SDH Networking]

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