LSP Load sharing / SDN

Transcription

1 LSP Load sharing / SDN Leonardo Sambrana Sr. Systems Engineer Extreme Networks PTT Forum 8

2 Agenda MPLS LSP Loadsharing Selective VMAN into VPLS MPLS and SDN

3 MPLS LSP Loadsharing

4 MPLS LSP Loadsharing Pseudo-wire (PW) Label Switch Path (LSP) Load Sharing provides the ability for L2VPN PWs to use multiple Transport LSPs for carrying tunneled data across the MPLS network. One of the primary drivers for this functionality is related to traffic distribution over Link Aggregation Groups (LAG). Current HW hashing algorithms on MPLS Transit Nodes uses MPLS labels to derive a hash value. While a L2VPN PW uses only 1 Transport LSP, there are only 2 MPLS labels to hash on (Outer transport label, inner VC label) for a given PW. When a PW uses multiple Tunnel LSPs, there are more labels for the HW to use for hashing, resulting in a significantly improved distribution over LAG in MPLS Transit Nodes Label 1 EXP Bottom = 0 TTL Label 2 EXP Bottom = 1 TTL

5 MPLS LSP Loadsharing ISP4 ISP1 Outer Label LSP... Inner Label Layer 3 Header VC 1. Single VPLS PW (Pseudo-wire) 2. Multiple LSP s for a single PW over a LAG group 3. Traffic is hashed based on the MPLS Shim Header Outer Label (LSP) Extreme Networks Confidential and Proprietary. Internal Use Only

6 MPLS Traffic Distribution over LAG with LSP Loadsharing ISP4 ISP1 Single PW Muliple LSP s

7 Topologia x/30 1 lo x/30 lo x/30 2 lo x/ lo x/ x/30 lo

8 1.1.1.x/ 30 lo x/ x/ 30 2 lo x/ lo x/ lo x/ 30 8

9 9

10 10

11 11

12 x/ x/ x/30 lo lo lo x/ x/ x/ lo

13 13

14 14

15 Label 1 EXP Bottom = 0 TTL Label 2 EXP Bottom = 1 TTL 15

16 16

17 Selective VMAN (VLAN) into VPLS

18 Selective VMAN (VLAN) into VPLS Selective VLAN mapping to VPLS provides the ability for multiple VLANs to be mapped to a single VPLS service. This is achieved by assigning VMAN with CEP port as a service to VPLS. VMAN is the VLAN stacking (a.k.a. Q-in-Q) feature. It has two types of ports: access and network. The access port can be unaware or aware of VLAN. The customer edge port is the VLAN aware port of VMAN. It is also known as selective Q-in-Q. The CEP allows plethora of configurable options. - An Ethernet port can be associated with multiple VMANs based on the CVIDs. - Multiple CVIDs on multiple Ethernet ports can be associated with a VMAN. - A range of CVIDs can be specified instead of individually configured. - CVID translations and egress filtering.

19 Selective VMAN (VLAN) into VPLS VPLS Peer C-DA C-SA STAG CTAG DATA FCS ISP 4 ISP 1 VLAN 10 VLAN 11 VLAN 12 ISP 2 ISP 3 CEP Port create vman vm1 configure vman vm1 add ports 3 cep cvid create vpls VSI1 fec-id-type pseudo-wire 35 configure vpls VSI1 add service vman vm1 configure vpls VSI1 add peer core

20 Selective VMAN (VLAN) into VPLS VLAN A, B, D, E VLAN B, C Port 1 Port 2 VPLS 1 for VLAN A, B, C VPLS 2 for VLAN D VPLS 3 for VLAN E VLAN A, E Port 3 20

21 Exemplo de uso de Selective VMAN (VLAN) ISPa PE - Switch 1 ISPb P VPLS VPLS P SEM SELECTIVE VMAN (VLAN) VPLS por grupo de interese de tráfego Pseudowires por VPLS: n(n-1)/2 Pseudowire por switch/vpls: n-1 Para n=60, 20 VPLSs 1770 pseudowires por VPLS Total = pseudowires na rede 59 pseudowire por switch/vpls Total = 59*20 = 1180 pseudowires por switch PE - Switch 2 PE - Switch n ISPc ISPd ISPe ISPn 21

22 Exemplo de uso de Selective VMAN (VLAN) ISPa PE - Switch 1 ISPb P VPLS VMAN P COM SELECTIVE VMAN (VLAN) Grupos de interesse de tráfego utilizando VMAN única Pseudowires por VPLS: n(n-1)/2 Pseudowire por switch/vpls: n-1 Para n=60, 1 VPLS 1770 pseudowires por VPLS Total = 1770 pseudowires na rede 59 pseudowires por switch PE - Switch 2 PE - Switch n ISPc ISPd ISPe ISPn 22

23 MPLS - SDN MPLS - SDN 23

24 Why MPLS? MPLS Services Why do Service Providers use MPLS? MPLS VPN s MPLS - TE Motivation High profitable Flexibility Resiliency / Redundancy Transparency Motivation Deterministic Behavior Efficient Resource Utilization 24

25 Traditional deployment 25

26 OpenDaylight Helium 26

27 SDN MPLS Deployment 27

28 MPLS Traffic-Engineering 28

29 MPLS L3-VPNs 29

30 Referencias Saurav Das, Unified Control Architecture for Packet and Circuit Network Convergence, PhD Thesis, Stanford University,. - Saurav Das, Ali Reza Sharafat, Guru Parulkar, Nick McKeown, MPLS with a Simple OPEN Control Plane, invited talk at Packet Switching Symposium at OFC/NFOEC'11, Los Angeles,. 30

31