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APRICOT 2011 - MPLS-based Metro Ethernet Networks v1.0

APRICOT 2011 - MPLS-based Metro Ethernet Networks v1.0

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Traditional <strong>Metro</strong> <strong>Ethernet</strong> <strong>Networks</strong><br />

Provider Backbone Bridging<br />

Takes IEEE 802.1ad to the next level<br />

MAC-in-MAC technology:<br />

Customer <strong>Ethernet</strong> frames are encapsulated in a provider <strong>Ethernet</strong> frame<br />

Alleviates the MAC explosion problem<br />

Core switches no longer need to learn customer MAC addresses<br />

Does not address the STP issue, however.<br />

46 | <strong>MPLS</strong>-<strong>based</strong> <strong>Metro</strong> <strong>Ethernet</strong> <strong>Networks</strong>, February <strong>2011</strong>

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