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Label Switched Ethernet (LSE) Architecture

Label Switched Ethernet (LSE) Architecture. 2005. Nov. 8 Jaihyung Cho Jaihyung@etri.re.kr draft-jaihyung-ccamp-lse-architecture-00.txt. Proposed Label Structure. ONE of the Solutions Presented to GELS BoF so far Use Lower 24bit of MAC Address for Ethernet Label

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Label Switched Ethernet (LSE) Architecture

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  1. Label Switched Ethernet (LSE) Architecture 2005. Nov. 8 Jaihyung Cho Jaihyung@etri.re.kr draft-jaihyung-ccamp-lse-architecture-00.txt

  2. Proposed Label Structure • ONE of the Solutions Presented to GELS BoF so far • Use Lower 24bit of MAC Address for Ethernet Label • Obtain 24bit of OUI Number from IEEE • Bi-directional Label (Includes Up/Down Stream Label) - Simple to send FEEDBACK to Ingress if something wrong • May use with 802.1Q (VLAN)

  3. S1 D1 error Straightforward Implementation • Ingress Encapsulates IP Packets in GMPLS-Ethernet Frames • GMPLS Core Bridges Forward Ethernet Frames to Egress Edge • Edges Must Divide 224(=16,777,216) Label Space (Address Block) • Label is NOT Swapped in This Model

  4. S2 Lc Ld La Lb S1 e2 e1 IP e1 La IP Lb Lc IP Ld e2 Label Swapping at Edge Invariant Region • MAC Address Label May be Invariant in Local Range • It Needs to be Swapped at Different Administrative Domain • e.g.) Between Provider Network • MAC Address is NOT Unique • Label Swapping Improves Scalability (Global Scale) • Label Swapping Allows Local Assignment Label Swapping Edge Label Swapping Edge

  5. MAC-in-MAC Tunneling • User Frame can be Encapsulated by Provider MAC • MAC-in-MAC performs better than Q-in-Q - No MAC Explosion Problem • Edge Bridge Requires Encapsulation Capability

  6. Why LSE is Good ? • Does Not Change Ethernet Behavior • MAC Learning, Spanning Tree, Broadcasting, VLAN, … • Non-GMPLS Frame Flows are NOT Affected At All • Ethernet, GMPLS are Bi-directional So is LSE • Semantic Change of MAC address ?  no side-effect • Backward Compatible with 802.1D/Q Bridges • NO-Homogeneous Deployment !!! • LSE only Controls GMPLS prefixed Frames • Smooth Transition from Ethernet  GMPLS • Good to apply in Aggregation/Core Network • Considering Future Extension to Local/Access…

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