This explaing basics concepts of QOS with some elite graphics, which helps to understand the difference between various comcepts of QOS

1. Quality of Service (QOS) Prepared by-: Pratik Mavani CCNA, CCNP CCIE Theory 350-001

3. Understanding QOS Requirements

4. Methods of Deploying QOS

7. Citrix

8. FTP

9. Voice

10. Smooth

11. Not Dangerous

12. Delay / Drop Sensitive

13. Video

14. Bursty

15. Greedy

17. Packet loss

18. Delay

19. ITU defined < 150 ms for voice and video

20. It’s a normal PSTN standard. Voice even works fine till 200 ms

21. Jitter

27. Link Fragmentation and InterleavingVoice Packet Fragments larger packet so priority traffic won’t be delayed Data packet

29. Configuring Class Maps

30. Configuring Policy-Maps

33. How can we classify ?

36. Creating a class map

37. Classifying traffic on various criteria Classifying traffic with NBAR – Wowww…

38. Downloading a PDLM

39. Updating PDLM on a router

41. Where should marking be done ?

42. Types of Marking

43. Layer 2

46. Typically stripped at Router Hops

47. Examples

48. COS

49. Frame Relay DE Bit

50. ATM CLP Bit

51. MPLS EXP Bit

52. Layer 3

53. Passes through Routers

54. Examples

55. IP Precedence

57. Match Traffic Statements

58. Policy Map

59. Match the above class map

60. Mark the traffic with the help of “set command”

62. The DSCP World 1 Byte IP Prec Values (0-7) 00000 000 00000000 DSCP 00 00 000 Major Minor ECN

63. Standard DSCP Values DSCP 00 00 000 Values for backward compatibility with IP Prec Major Minor ECN 5 - Voice EF 4 –Video Conf. AF4 AF3 3– Call Signaling 2 – High Priority Data AF2 1 – Medium Priority Data AF1 AF AF AF 2 1 1 1 3 1 0 – Default 0 – Best Effort Data AF AF AF 1 2 3 2 2 2 AF AF 3 3 2 3 AF 1 3 Also Known as Drop Preference (The higher the value higher the drop preference) AF AF 4 2 4 AF 1 4 3

65. Match the SMTP Traffic and set the high priority with DSCP value

67. Mark SMTP with high priority with DSCP Value and reserve 20% of bandwidth

68. Mark WEB traffic with low priority and reserve 10% of bandwidthApply the policy map on Outgoing interface of Router Verify the policy

69. Show ipnbar protocol-discovery stats