Cisco DS-TE Lab Trial Bill Cerveny <cerveny@internet2.edu> - PowerPoint PPT Presentation

Cisco DS-TE Lab Trial Bill Cerveny <cerveny@internet2.edu> John Moore <jhm@ncstate.net> Paul Schopis <pschopis@itecohio.org> and mostly as a proxy... Ben Teitelbaum <ben@internet2.edu> IETF TEWG Experience Report - March 22, 2001

Background • Abilene backbone trying to implement a QBone Premium Service domain • Service goal : EF edge-to-edge "virtual trunk" • Cisco suggested that DS-TE might be helpful tool to complement MDRR, CAR, QPPB,... • Learned enough to pique our interest • Cisco and Internet2 agree to perform EFT • Test suite developed and executed in lab by Internet2 ITECs IETF TEWG Experience Report - March 22, 2001

•47 connectors Abilene Topology •183 participants January, 2001 •34 connections to 20 peer networks IETF TEWG Experience Report - March 22, 2001

Early Hopes for DS-TE • Before we were fully briefed, we thought DS-TE might give us... – Resource accounting / admissions control – Up-calls on constraint failure – Delay constraints too – "Trunk-style" classification and policing – Mechanism to protect PQ resources from non- policed connectors • After briefing, understood that DS-TE only addressed first item above IETF TEWG Experience Report - March 22, 2001

Implementation vs. Drafts • Support for two Class-Types (CT0, CT1) • CT1 bounded by "Max Reservable CT1" and by "Max Reservable Aggregate" • CT0 bounded by "Max Reservable Aggregate" only • Class-Types called "bandwidth pools" • Pre-standard IGP extensions ( e.g. use of Cisco-proprietary TLV in OSPF) IETF TEWG Experience Report - March 22, 2001

Abilene Premium Service Example Guaranteed Bandwidth service 10 Mbps OSU-->UNC Real-Time OSU UNC Campus 2 BE (Class-Type 0) Tunnel Campus3 (BE up to 100% on every link) EF (Class-Type 1) Tunnel (EF below 10% on every link)

Test Network Smartbits 2000 AS 1000 AS 4000 AS 2000 10.130.x.y/24 10.160.x.y/24 10.140.x.y/24 3.2 7200-VXR-A (ARz) Semtec (GSR A) FE Nitro (GSR C) 3.1 OC-3 3.1 3.2 LB = 255.3 LB = 255.2 P4/2 7505-A (ARx) L4 172.16 P1/3 172.16 P3/3 49.1 49.2 OC-12 2.1 2.2 1.2 1.1 P5/3 P4/3 OC-3 OC-3 P3/2 P3/1 P1/2 P1/1 1.1 1.2 2.2 4.1 6.1 7505-B (ARy) 1.1 FE FE L5 L3 1.2 1.2 OC-12 OC-12 Gunpowder (GSR B) AS 3000 Smartbits 2000 Smartbits 2000 OC-12 LB = 255.1 OC-12 10.150.x.y/24 2.1 1.1 P3/0 P3/1 Sink Domains Source Domain 4.2 6.2 Smartbits 6000 Smartbits 6000 Abilene Pseudo-Core

Basic MPLS TE Verification • Verification of Basic/Aggregate MPLS TE – Global Pool (Class-Type 0) bandwidth constraint mechanism – Route selection based on administrative weight – Re-routing on link failure – Verification of correct tunnel routing via CLI and by passing traffic IETF TEWG Experience Report - March 22, 2001

Test Network Smartbits 2000 AS 1000 AS 4000 AS 2000 10.130.x.y/24 10.160.x.y/24 10.140.x.y/24 3.2 7200-VXR-A (ARz) Semtec (GSR A) FE Nitro (GSR C) 3.1 OC-3 3.1 3.2 LB = 255.3 LB = 255.2 P4/2 7505-A (ARx) L4 172.16 P1/3 172.16 P3/3 49.1 49.2 OC-12 2.1 2.2 1.2 1.1 P5/3 P4/3 OC-3 OC-3 P3/2 P3/1 P1/2 P1/1 1.1 1.2 2.2 4.1 6.1 7505-B (ARy) 1.1 FE FE L5 L3 1.2 1.2 OC-12 OC-12 Gunpowder (GSR B) AS 3000 Smartbits 2000 Smartbits 2000 OC-12 LB = 255.1 OC-12 10.150.x.y/24 2.1 1.1 P3/0 P3/1 Sink Domains Source Domain 4.2 6.2 Smartbits 6000 Smartbits 6000 Abilene Pseudo-Core

DS-TE Lab Test Results 1/2 • DS-TE Extensions – Verified sub-pool route selection based on bandwidth availability: • e.g. Best Effort can get up to 100% of link capacity while EF tunnels were limited to the configured sub- pool budget – Achieves separate CAC and separate Route Computation for sub-pool tunnels – Verification of correct sub-pool (Class-Type 1) tunnel routing and forwarding IETF TEWG Experience Report - March 22, 2001

DS-TE Lab Test Results 2/2 • DS-TE Extensions (continued) – Verified sub-pool preemption mechanism (preemption orthogonal to b/w pool) – Successfully added MDRR PQ, CAR, and QPPB to approximate complete solution IETF TEWG Experience Report - March 22, 2001

Conclusions • DS-TE worked as advertised • Potentially useful tool in kit (if TE needed for non-Premium traffic) • Complete test report to be made public "real soon now"™ IETF TEWG Experience Report - March 22, 2001