1. Mutually Exclusive Link Group (MELG) draft-beeram-ccamp-melg-01.txt Vishnu Pavan Beeram (Ed), John Drake, Gert Grammel [Juniper Networks] Igor Bryskin (Ed), Wes Doonan [Adva Optical Networking] Manuel Paul, Ruediger Kunze [Deutsche Telekom] Friedrich Armbruster, Cyril Margaria [Coriant GmbH] Oscar González de Dios [Telefonica] Daniele Ceccarelli [Ericsson] draft-beeram-ccamp-melg-01.txt 1

2. Recap Presented [’00] in IETF 86 Discussion on mailing list – Abstraction/Virtual-TE Links – Concurrent Client Path Computation – Static vs Dynamic Virtual TE Link Mutual Exclusivity draft-beeram-ccamp-melg-01.txt 2

3. Static vs Dynamic Virtual TE Link Mutual Exclusivity Static – Permanent within a given network configuration – Resource used in its entirety by a single Virtual TE link (when committed) Dynamic – Temporary within a given network configuration – Resource shared simultaneously in some limited capacity by several Virtual TE links (when committed) 3 draft-beeram-ccamp-melg-01.txt

4. Static Mutual Exclusivity -Example 4 B A C D E F G H I J A B E F J I C D Client TE Info draft-beeram-ccamp-melg-01.txt Virtual TE Links [F-J] and [F-I] depend on the usage of the same non-shareable resource – source transponder Only one of the two Virtual TE Links can be committed at any given point of time.

5. Dynamic Mutual Exclusivity - Example 5 B A C D E F G H I J A B E F J I C D Client TE Info draft-beeram-ccamp-melg-01.txt Server WDM Link {H-I} has only 2 lambda channels available. Only two of the three Virtual TE Links – [E-I], [F-I] and [F-J] can be concurrently committed. Mutual Exclusivity is dynamic (it disappears when a third lambda channel becomes available on {H-I})

6. Questions Separate document for “Dynamic Virtual TE- Link Mutual Exclusivity”? Working Group status ? draft-beeram-ccamp-melg-01.txt 6 [‘01] Changes Clarify the current focus of the MELG draft Static Mutual Exclusivity

7. Thank you 7 draft-beeram-ccamp-melg-01.txt