1. MFA Forum requests PW Type Value for ATM Virtual Trunks Peter Busschbach Lucent Technologies

2. PE1 PE2 PSN ATM Network Establish PWs for ATM routing and signaling channel Establish PW for each ATM VC under control of ATM signaling ATM/MPLS Control Plane Interworking Client-to-Client 1-1 mapping between ATM VCs and Pseudo Wires

3. PE1 PE2 PSN ATM Network ATM/MPLS Control Plane Interworking Virtual Trunks With Virtual Trunks, ATM VC establishment is transparent to PSN Establish PW as Virtual Trunk

4. ME1 ME2 PSN ATM Network ATM/MPLS Control Plane Interworking Virtual Trunks – distributed implementation The distributed implementation enables interworking with minimal modifications to ATM switches and LERs L2E 1 L2E 2 Virtual Trunk is identified as a VPI range. E.g. {32, 63} ME maps VPI range to the Virtual Trunk PW

5. {0, 31} {32, 63} {0, 31} {32, 63} What VPI range should be used for this VT? A1 A2 A3 Translating VPI Ranges To increase manageability, VPI ranges are locally significant MEs translate VPI ranges –This does not require the ME to be involved in ATM VC establishment

6. New PT Type Value Liaison statement from MFA Forum requesting a new PW Type value for VTs Existing values are not applicable –0x0003 ATM transparent cell transport does not allow for VPI translation –0x0009 ATM n-to-one VCC cell transport is defined for a single VCC –0x000A ATM n-to-one VPC cell transport is defined for a single VPC Virtual Trunk Interworking Agreement is ready for Final Ballot