Adventures in Multi-Layer, Multi- Vendor Network Control. Wes Doonan Control Plane R&D July 2010

Transcription

1 Adventures in Multi-Layer, Multi- Vendor Network Control Wes Doonan Control Plane R&D July 2010

2 Connection Control Building the Pipes A software infrastructure for making network connections Connections as resources in a management/service plane Convergence of layers into unified delivery platforms Enough with the separate boxes, already Embedded control, external control; but anyway control Carrier 2

3 Transport Elements Today WDM Transport Integrated Multi-Degree ROADM 2-way, 8-way; with automated equalization Tunable Transponders, Tunable Filters Any wavelength, anywhere Full Control Plane Support Multiple Transport Capabilities Ethernet Transport Layer 2 Switching Functionality SVLAN support, EVC support, EPL/EVPL profiles Tag stacking (e.g. Q-in-Q), C- and S-tag Tag switching, VLAN crossconnect Full Control Plane Support OTN Transport OTN Encapsulation / Multiplexing Clients: OTn, Ethernet, FC, SDH, Standardized FEC, Encryption OTN Switching at multiple granularities ODU0, 1, 2, 3 Full Control Plane Support = now = soon 3

4 Layer Integration Multi-Layer Traffic Engineering Control Plane operations enabled in each transport layer Wavelengths engineered between WDM switching modules S-tagged flows engineered between Ethernet switching modules ODUk container flows engineered between OTn switching modules Control Plane handles element provisioning operations VLAN tag allocation and crossconnection, policer/shaper configuration ODUk container allocation and crossconnection, overhead configuration Packet Channel Module TDM Channel Module ETH Ports Ethernet VLAN Cross Connect WDM Ports Lambda Channel Module OTN Ports ODU0 Cross Connect WDM Ports WDM Ports WDM Ports MD-ROADM Cross Connect 4

5 Integrated Layer 2 Switching Packet Channel Module EVC Port Ethernet VLAN Cross Connect Aggregation/Switching of Ethernet flows 10PCA: 10x1GbE + 2x10GbE ports 2PCA: 4x10GbE ports Full set of VLAN tagging capabilities C-tag, S-tag, tag swapping, etc 10PCA-PCN-1G3+10G 2PCA-PCN-10G 2 Slot x 5 HU All interfaces pluggable (WDM SFP/XFP) Multiple cards per shelf, multiple shelves 5

6 VLAN Crossconnect VLAN tag Y VLAN tag Z VLAN tag X Hardware Optical DWDM transport Integrated L2 switching modules Push/pop s-tags at endpoint elements Swap s-tags at transit elements = Optical LSP, lambda A = Optical LSP, lambda B = ETH LSP, VLAN X = ETH LSP, VLAN Y + Z = swap tags (Y for Z) = add/remove s-tag Control Plane Optical tunnels setup via CP; label is Lambda Ethernet tunnels also setup via CP; label is VLAN tag VLAN tag may change along service path, per policy 6

7 WDM + Ethernet + Packet Packet TE Link: A <-> F B SWC: PSC/Packet BW: 2.5G 1.5G 0.5G 3.5G B LSP FLOW-1 BW: 1G SUB = sub layer LSP FLOW-2 BW: 1G BW = bandwidth SWC = switch caps A LSP FLOW-3 BW: 1G Ethernet TNL-ETH: CLIENT-1 SRC: A / 1-4-C1 DST: E / 1-3-C1 SUB: <none> BW: 2G A TE Link: A <-> E SWC: SVLAN/ETH BW: 8G 4.5G 10G B TE Link: B <-> E SWC: SVLAN/ETH BW: 5.5G 10G E TNL-ETH TRUNK-1 SRC: A / 1-4-C2 DST: B / 1-5-C2 SUB: PSC/Packet BW: 3.5G WDM TNL-WDM: WAVE-1 SRC: A / 1-4-N DST: E / 1-3-N SUB: SVLAN/ETH BW: 10G A B C F TNL-WDM: WAVE-2 SRC: B / 1-5-N DST: E / 1-3-N SUB: SVLAN/ETH BW: 10G = WDM+ETH element D E 7

8 ODUk Switching ODUx ODUy ODUm Hardware Supports aggregation, switching modules Add/Drop ODUk container(s) and edges Switch containers at transit elements Support high- and low-order encapsulation = Optical LSP, lambda A = Optical LSP, lambda B = OTN LSP, ODUm = OTN LSP, ODUx + ODUy = swap containers (x for y) = map/unmap Control Plane Optical tunnels setup via CP; label is Lambda ODUk tunnels also setup via CP; label is Container(s) Container(s) may change along service path, per policy 8

9 WDM + OTN + Packet Packet TE Link: A <-> F B SWC: PSC/Packet BW: 30G 20G 10G 40G B LSP FLOW-1 BW: 10G SUB = sub layer LSP FLOW-2 BW: 10G BW = bandwidth SWC = switch caps A LSP FLOW-3 BW: 10G TDM TNL-TDM: CLIENT-1 SRC: A / 1-4-C1 DST: E / 1-3-C1 SUB: <none> BW: ODU2 (10G) A TE Link: A <-> E SWC: TDM/G.709 BW: ODU4 (100G) (90G) (50G) B TE Link: B <-> E SWC: TDM/G.709 BW: ODU4 (100G) (60G) E TNL-TDM TRUNK-1 SRC: A / 1-4-C2 DST: B / 1-5-C2 SUB: PSC/Packet BW: ODU3 (40G) WDM TNL-WDM: WAVE-1 SRC: A / 1-4-N DST: E / 1-3-N SUB: TDM/G.709 BW: ODU4 (100G) A B C F TNL-WDM: WAVE-2 SRC: B / 1-5-N DST: E / 1-3-N SUB: TDM/G.709 BW: ODU4 (100G) = WDM+OTN element D E 9

10 Provisioning Methods Top Down Provisioning at a higher layer requests topology from lower layer Higher layer request intercepted at network reference point (e.g. ) If needed, lower layer LSP instantiated to support request Paths determined individually as needed Bottom Up In-network agent determines when/if to add to higher-level topology Sub-optimal; visibility only to the immediate request Provisioning in a lower layer creates topology in a higher layer LSP in WDM layer becomes a TE link in the OTN or Ethernet layer And so on; LSM in OTn layer becomes a TE link in the Packet layer Forwarding Adjacency Label Switched Path (FA-LSP, e.g. RFC4206) Directly planned and routed by the operator Paths computed within each individual layer separately Intra-layer effects indicated via link metrics/colors/srlgs Optimal resource use, predictable/controllable outcomes Find optimal set of lower-layer LSPs to support higher-layer traffic matrix 10

11 Top-Down Layering = ETH = WDM+ETH MLC = ETH LSP = WDM LSP = ETH TE Links Area 0 = WDM LSP MLC = Multi-Layer Control Area 1 MGMT Area 2 START END 11

12 Bottom-Up Layering = ETH = WDM+ETH = ETH LSP = WDM LSP = ETH TE Links Area 0 = WDM LSP Area 1 MGMT Area 2 START END 12

13 Multi-Vendor Interoperability Transport / Data Network Convergence Network asked to deliver 1G/10G/40G/100G pipes Pipes deliverable at L0/L1, L2 or L3 Cost/function trade-offs exist to deliver at any given layer Control and management costs are similar, however Interoperability through Standardization IETF: MPLS, GMPLS, etc OIF:, E-, I- ITU-T: Terminology and Architecture Directions, Progress Rich set of connection control functions Resource discovery, signaling in any layer Path Computation Element (PCE) for any layer Commercial inter-domain components / reference points and gateways ITU-style layer network traffic engineering architecture 13

14 Juniper ADVA Juniper M320 10GbE PIC 10G OTn PIC Tunnel PIC SWITCH ADVA FSP3000R7 WCC10GT 4OPCM 2 x eroadm SWITCH Juniper M320 10GbE PIC 10G OTn PIC Tunnel PIC 320a 320b R7a R7b = 10GbE / STM64 on 1310nm to WCC-PCTN-10G = OTn DWDM to 4OPCM or eroadm = RSVP-TE, OSPF-TE = 10/100 eth (fe0, eth0) = GRE tunnel = OSC 14

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