" The IETF is forming a new working group to address scalability issues in the Internet's routing system caused by companies splitting their network traffic over multiple carriers, a practice called multihoming.
The new working group will build upon a base proposal from a team of Cisco engineers to create a new tunneling mechanism that will be used by the Internet’s edge and core routers.
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The new mechanism — dubbed LISP for Locator/Identifier Separation Protocol — is designed to reduce the number of entries in the routing tables stored in the core routers operated by ISPs"
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