This document is an Internet Draft. Note that other groups may also distribute working documents as Internet Drafts.
Internet Drafts are draft documents valid for a maximum of six months.
Internet Drafts may be updated, replaced, or obsoleted by other documents at any time. The scalability of label switching over ATM is one of fundamental issues in MPLS that has not been fully understood. Whether or not one should assume stream merging in ATM is a major design decision that has many implications to MPLS protocols and ATM hardware design. In this document, we present an analysis of scalability of label switching over ATM, and examine some possible solutions. We now look at the worst-case label requirement, namely the maximum number labels required on a single link in one direction.