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Introduction. What Is SmartFlow?. SmartFlow is the first application to test QoS and analyze the performance and behavior of the new breed of policy-based network devices. Switching Fabric. Congested port. Output Port. High priority - Telnet. Input Ports. Medium priority - FTP. - PowerPoint PPT Presentation

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Page 1: Introduction

Introduction

Page 2: Introduction

2

What Is SmartFlow?

SmartFlow is the first application to test QoS and analyze the performance and behavior of the new breed of policy-based network devices.

High priority - Telnet

Medium priority - FTP

Low priority - HTTP

Congested port

Input Ports

Output Port

Switching Fabric

Stream-based measurements include:Throughput, min/max/ave latency,latency distribution, and latency variation.

Page 3: Introduction

3

SmartFlow Basic Features

Automated Throughput Test.

Enhanced Wizards for Network and Flow setup.

Multiple Traffic Patterns via the Group Wizard.

IP/UDP/TCP/ICMP frames can be chosen for flows.

The user can specify a payload fill pattern per port.

Iterate tests over different frame lengths.

High Density “Cyclic” flows.

BGP4 router testing including BGP flapping.

Tracking of Stray Flows.

Results can be output in HTML format.

Results from all tests can be exported at one time.

Page 4: Introduction

4

Summary of SmartFlow test !

Throughput Measures the maximum rate at which frames from flows and groups sent through a device

can be sent without frame loss.Jumbo

Measures frame loss, latency, and latency distribution in flows and groups of flows sent through a device, and updates each of these results simultaneously. It also measures latency standard deviation based on latency distribution, and the number of frames received that were out of sequence. Frame Loss

Measures the number of frames lost from flows and groups sent through a device.Latency

Measures the minimum, maximum, and average latency of received frames in flows and groups of flows sent through a device.Latency Distribution

Measures the latency of received frames in flows and groups of flows sent through a device, and sorts them into 8 latency buckets. Compared to the Latency test, this test can provide a finer view of latency behavior at the DUT’s load tolerance limits.Latency Over TimeLatency Snap Shot

Measures the latency of each received frame, for a specified number of frames in flows and groups of flows sent through a device.

Page 5: Introduction

User Interface

Page 6: Introduction

6

Main Window - Shortcut Bar

Page 7: Introduction

7

Main Window - Setup & Run

Page 8: Introduction

8

Main Window - Results View

Page 9: Introduction

9

Results - Chart

StatusBar

Page 10: Introduction

10

Results - Summary

Page 11: Introduction

11

Results - Detail

Page 12: Introduction

12

Results - Stray Frames

• Stray frames results show per port, frames that werereceived but were not destined (expected) for that port.• It also lists each flow (not SmartFlow) containing thestray frames received by that port.• When stray frames are received, the destination IPaddress of the flow does not match any of the IPaddresses associated with the port that received the frames.• Each row in the Stray Frames tab represents one flowof a SmartFlow. The following items uniquely identify a flow:

– Source IP address– Destination IP address– SmartFlow name

Page 13: Introduction

13

Results - Port Errors

Page 14: Introduction

14

Saving Results - 3 Ways

Results can be saved in a variety of ways:1. Saved in the configuration file by selecting File > Save.

2. Saved in individual files; the chart is saved as a JPEG and the summary, detailed, and stray frames reports are saved as CSV.

3. Saved in HTML format.

1-- 2

- 3

Page 15: Introduction

15

Saving Results - HTML

Page 16: Introduction

16

SmartBits Connections

Page 17: Introduction

17

Connected to a Chassis

ConnectionStatus

Page 18: Introduction

18

Help > About SmartFlow

Displays the SmartBits controller’s and port’s firmware versions.

Page 19: Introduction

Base Configuration

Page 20: Introduction

20

Test Setup Sequence

You must configure the Test Setup parameters in the correct order.The tabs appear in the correct configuration sequence.Depending on the test, some tabs may not be applicable (i.e., BGP tab)Configure the base configuration parameters from the “Networks”, “Cards”, and “WAN” tabs.

Steps 1 2 3 4 5 6 7 8 9 10

Base Configuration

Page 21: Introduction

21

Reserving Ports

Once connected, reserve the ports from the Cards Tab.

This applies to all except the SMB-200 which is not multi-user.

Page 22: Introduction

22

Base Configuration - Cards tabThe Cards tab is used to configure the Port’s behavior.

It is also used (along with the Networks tab) to set the defaults for the flows.

Page 23: Introduction

23

Cards tab - Read State

Useful for large systems where only a few ports are being used.

Three States: Active, Inactive, Listening. Active: Can be either a Transmitter and/or Receiver port. Inactive: Does not show up in SmartFlow anywhere. Listening: Does not show up in other screens but ports are

configured and listen for stray frames on the stray frame report.

Page 24: Introduction

Card Setup

Page 25: Introduction

25

Base Configuration - Networks tab

The Networks tab defines the IP networks associated with each port.The “Port IP Address” can act as the next-hop router for each of the networks created. It can also be used to ping the port.The Networks tab also sets the defaults for the flows.

Page 26: Introduction

26

Base Configuration - Network Wizard

Add IP networks quickly using the Network Wizard!The Network Wizard automatically creates multiple networks across multiple ports.

Page 27: Introduction

Creating Groupsof Flows

Page 28: Introduction

28

Creating Groups of Flows - BeforeNo Groups or Flows (traffic) created yet.

Groups WindowPane and

Tool Buttons

Page 29: Introduction

29

Creating Groups of Flows - After

Four Groups each associated with three Flows created.

Groups

Flows

Page 30: Introduction

ModifyingIndividual

Flows

Page 31: Introduction

31

Modifying/Creating Flows

Flows can be added or modified from the SmartFlows tab.

Flow WindowPane andTool Bar

SecondarySetup tabs

Page 32: Introduction

32

Flow Attributes Tabs

The SmartFlows tab has a number of sub-tabs for modifying the Layer 2-4 attributes of the flows.

Page 33: Introduction

33

Flow Attributes - Traffic Tab

The flow attributes such as the source/destination physical port, IP protocol, frame length, and variable fields within the flow.

Page 34: Introduction

34

Flow Attributes - Ethernet II Tab

The flow’s source and destination Layer 2 MAC addresses (from the Cards tab).

Page 35: Introduction

35

Flow Attributes - VLAN Tab

Only valid if VLAN ID is enabled from the Networks tab.

Set on theNetworks

tab

Page 36: Introduction

36

Flow Attributes - IP Tab

The flow’s source and destination IP addresses (from the Networks tab), TOS or Diffserv bits, and Time to Live field.

Set to 1with

Cyclic Flows

PriorityOptions

Page 37: Introduction

37

Flow Attributes - TCP Tab

The flow’s source and destination TCP port (IP protocol = 6).

Page 38: Introduction

38

Flow Attributes - UDP Tab

The flow’s source and destination UDP port (IP protocol=17).

Page 39: Introduction

39

Flow Attributes - ICMP Tab

The flow’s ICMP Type and Code fields (IP protocol=1)

Page 40: Introduction

Test Setup

Page 41: Introduction

41

Test Setup Tab - Test Iterations Tab

Frame Sizes (Global or per Flow), Test Loads, and Iteration constants.

Continuous looping mode and Offered vs. Intended load.

Page 42: Introduction

42

Frame Sizes - SmartFlows Tab

Each flow can manually be set to its own frame length.

Or it can be assigned to a previously configured sequence.

Manual Method

OR

Page 43: Introduction

43

Frame Sizes - How Sequences are Created

From the Test Setup tab, select the Custom Frame Size Table.The number if Iterations should be equal to the number of test loads.

Page 44: Introduction

44

Frame Sizes - Frame Size Automation

When Frame Size Automation is enabled (Global), all Flows are set to one frame size.

This

or

That

Page 45: Introduction

45

Test Loads - Cards TabEvery port can run at the same rate.Or they can be assigned to a previously configured sequence.

StepMethod

SequenceMethod

Page 46: Introduction

46

Test Loads - How Sequences are Created

This

or

That

Page 47: Introduction

47

Test Setup Tab - Learning Tab

How the application will send learning frames.

Page 48: Introduction

48

Learning - Send to Ports

Benefits Phase TX Port RX Port

DUT Set Up Ports/Learn Full Full/Partial

SmartBits Set Up Flows Full/Partial** ARP Enabled only

Page 49: Introduction

49

Test Setup Tab - Individual Tests Tab

Test specific parameters for the Latency Distribution, Latency SnapShot, Latency Over Time, and Throughput tests.

Page 50: Introduction

50

User Info Tab (for HTML Export)

This information is used for the top of the summary and chart HTML files and contains information about the configuration.

Page 51: Introduction

Running a Testand

Viewing Results

Page 52: Introduction

52

The Shortcut Bar

TestStart

Buttonsin

Setup & RunMode

ViewTest

ResultsButtons

inResultsMode

Page 53: Introduction

53

Detailed TestSetup and

Results

Page 54: Introduction

54

Order to Accomplish Tests

SmartFlow tests should be accomplished in the following order:Frame LossThroughputLatencyLatency DistributionJumboLatency Over TimeLatency Snap Shot

Page 55: Introduction

55

Results - Frame Loss

Measures the number of frames lost from flows and groups sent through a device.

Page 56: Introduction

56

Results - Throughput

Measures the maximum rate at which frames from flows and groups sent through a device can be sent without frame loss.

Determines this rate “automatically.”

Page 57: Introduction

57

Results - Latency

Measures the minimum, maximum, and average latency of received frames in flows and groups of flows sent through a device.

Page 58: Introduction

58

Results - Latency Distribution

Measures the latency of received frames in flows and groups of flows sent through a device, and sorts them into 8 latency buckets.

Compared to the Latency test, this test can provide a finer view of latency behavior at the DUT's load tolerance limits.

The standard deviation for the Latency Distribution test depends in part on the size of the latency buckets you specify in the test setup.

Discussed on the next slide

Page 59: Introduction

59

Standard Deviation (Jitter)

Jitter is variation in latency between packets in a flow.

Jitter is reported as latency “Standard Deviation” in SmartFlow.

The Standard Deviation is based on the Latency Distribution buckets and is displayed in microseconds:If the latency distribution all falls into one bucket,

the standard deviation is zero (0). If the latency distribution spans multiple buckets

the standard deviation will be larger.Standard Deviation results also starts increasing

when frame loss begins to occur.

Page 60: Introduction

60

Results - Jumbo

Simultaneously measures the frame loss, latency, and latency distribution in flows and groups of flows sent through a device.

Updates each of these test results simultaneously.

The latency “Standard Deviation” is based on latency distribution.

Displays the number of frames sent, received, and lost.

Page 61: Introduction

61

Results - Latency Over TimeThe Latency Over Time test shows the overall pattern of latency across time as the test is run.Shows for each receiving port, the minimum, average, and maximum latency of frames received during the specified time interval throughout the test.

Page 62: Introduction

62

Results - Latency Snap Shot

Measures the latency of each received frame, for a specified number of frames in flows and groups of flows sent through a device.

Latency is calculated for all received frames.


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