QoS Service Level Agreement (SLA) for Tactical/Deployed Scenario Deborah Goldsmith MITRE Corporation

2 Outline Problem Statement General Requirements Scenario Description Tactical /Deployed SLA Data Classification and Marking Issues Questions

3 Problem Statement Meet QoS Service Level Agreements (SLA’s) for the Tactical/Deployed platform across the End-to-End Circuit

4 General Requirements* Applications will converge to a common infrastructure (most likely Layer 3 IP) –Voice –Video –Datagram –Control/Management Applications MUST work end-to-end across wide diversity of LANs, MANs, WANs System MUST allow user to indicate mission- based priority and support priority handling to resolve end-to-end bottlenecks System MUST meet stringent IA requirements * DISA,

5 Scenario Description: The End-to-End Circuit* FIXEDTACTICAL CAMP/POST/STATIONWIDE AREA NETWORKTACTICAL/DEPLOYED END-TO-END DISN Solution must apply to ALL elements of the Defense Information Systems Network (C/P/S, WAN, TACTICAL) –F-F, F-T, T-T Multiple domains –Traffic in the WAN traverses many network domains that may be considered analogous to external carrier networks with their own QoS/SLA’s * DISA,

6 Scenario Description: The Tactical/Deployed Segment Tactical \deployed communications use multiple RF gateways RF gateways represent bottlenecks due to bandwidth constraints

7 Scenario Description: The Tactical Platform & the RF Gateway enclave VPN WAN GW WAN GW LAN RF GW LOS SLA

8 Tactical/Deployed SLA Minimum bandwidth guarantees for specified data types or sources B/W, latency, jitter guarantees for VoIP and packet VTC Latency guarantees for tactical messages No starvation for Best Effort (BE) (aggregate)

9 Data Classification and Marking

10 Application Flow Categories* QoS Application Flow TypeApplication ExampleFlow Continuous/InteractiveVoice over IP, VTCTCP Setup and UDP Flow StreamingVideo Imagery, Multicasting TCP Setup and UDP Flow Block TransferTelnet, httpTCP Flow Batch Transfer , ftpTCP Flow TransactionalClient / Server, e-commerceTCP Flow OtherSNMP, RIP, OSFP, BGP, TFTP, DHCP, ICMP Non-TCP Each category has QoS Performance Metrics * DISA,

11 Marking RFC’s

12 Sample DSCP Marking by Application Categories Marking by priority and latency requirements

13 Issues Mobility Ad-hoc Networks Link outage and degradation

14 Questions –Can DiffServ (DSCP’s) be the basis of a near-term implementation plan to implement end- to-end QoS for the tactical/deployed scenario? Bandwidth Reservation for some applications B/W, Latency and Jitter guarantees for VOIP, VTC Latency guarantees for tactical messages Priority and precedence No starvation for Best effort –What are the end-to-end QoS mechanisms to implement a long-term implementation plan? Dynamic QoS based on policy Admission control QoS-aware applications signaling the network Reroute with QoS on link failure /degradation Mobility Performance monitoring and control Yes No