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Link Capacity Adjustment Scheme
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<p>Link Capacity Adjustment Scheme or LCAS is a method to dynamically increase or decrease the <a href="/facts/Bandwidth_(computing)/lY6Tb4gX">bandwidth</a> of <a href="/facts/Virtual_concatenation/K3j6LKTg">virtual concatenated</a> containers. The LCAS <a href="/facts/Communications_protocol/5uady7cB">protocol</a> is specified in <a href="/facts/ITU-T/9nJwkPYx">ITU-T</a> G.7042. </p><p>It allows on-demand increase or decrease of the bandwidth of the virtual concatenated group in a <i>hitless</i> manner. This brings <i>bandwidth-on-demand</i> capability for data clients like Ethernet when mapped into <a href="/facts/Time-division_multiplexing/tv7bMh1v">TDM containers</a>. </p><p>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. </p>