Transcript QoS Application Monitoring and Other Tools for a Better User

March 25 – 27th, 2014 І Orlando, FL
Quality of Experience
Mike Fitzgerald
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Quality of
Experience
QoS, Avaya Diagnostic Server,
SLAMon™ and tools for a
better user experience
© 2014 Avaya Inc. Avaya – Confidential & Proprietary
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Problem Scenario
New Hires Report Degraded Video Quality to IT During Recent Video Training
Sessions
New Hires
HQ
New Hires
Paul
1. An Insurance company regularly conducts remote PC-based video training exercise for their new hires across multiple sites that
don’t require the use of Avaya IP phones.
2. The company streams video from a central training system at HQ to New Hires at each of the remote sites.
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3
Problem Scenario
New Hires Report Degraded Video Quality to IT During Recent Video Training
Sessions
New Hires
HQ
New Hires
Paul
1. The New Hires have complained that in the past training sessions, some sites (but not all) have experienced
degraded video quality during the sessions.
2. Now what?.
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4
March 25 – 27th, 2014 І Orlando, FL
Avaya Diagnostic Server
and SLAMon™ Overview
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Avaya Diagnostic Server with SLAMon™
Empowers customers with proactive tools
Provides Customers with Early Warning Signs for Preventative Actions
 Intelligent, proactive agents embedded in Avaya equipment
 Local Interface delivers end to end network visibility for voice, video and data
traffic
 Identifies and isolates QoS problems across each network hop using
synthetic sessions and defined traffic priority levels
 Provides graphical reporting of latency, delay, jitter, and estimated MOS
 Proactive Alarms based on thresholds sent to multiple destinations –
enterprise NMS, Avaya
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6
Network Monitoring – Spring 2014
Using synthetic test patterns that do not load the network…
Monitor hop-by-hop QoS integrity:
Monitor network performance:
Packet loss
Is the DSCP marking preserved
end-to-end?
Jitter
Delay
At which hop is the marking
being changed?
Emulate three traffic types:
Keep a 60-day history
of the network performance
statistics to correlate
product/solution disruptions
to network disruptions
Voice
Video
Data
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7
How SLA MonTM Technology Works
agent
ERS switch
agent
ERS switch
Intelligent agents embedded in Avaya products and controlled
by the SLA Mon™ server to provide advanced capabilities
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8
Network Monitoring – Summary Matrix
Holistic view of all network links being monitored
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9
Network Monitoring – Detailed Graphs
 View the details of a specific location pair
 Select the desired time period, traffic type,
and measured traffic parameter
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10
Network Monitoring – Hop-by-Hop QoS
 Is the DSCP marking preserved end-to-end?
 At which hop is the marking being changed?
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11
Proactive Alarming
When Network Thresholds Are Breached
SNMP traps sent to multiple destinations – enterprise NMS, Avaya
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12
Products w/ Embedded SLA Mon Agent
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13
March 25 – 27th, 2014 І Orlando, FL
Avaya Diagnostic Server
Installation Requirements
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New Install Packages for Avaya Diagnostic Server
Software
VMware OVA
To install on customer’s server
or virtual server
To install on customer’s Vmware
environment
We will have a download site linking to
PLDS
We will have a download site linking to
PLDS
iON Server
SVM
For customers who want
a low-cost appliance
On System Platform product templates
that support the latest SVM TBD
Will be sold through Select Product
Program, same as today
Note: SVM does not support Network
Monitoring
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15
Avaya Diagnostic Server 2.0 Install
 ADS 2.0 can be delivered in 3 ways
 New install
 Standalone server
 ADS 2.0 OVA similar to the VE 1.0 SAL OVA
 Upgrade of an existing SAL GW
 Assumes server meets hard drive, processing and memory needs of the
applications
 Migration would be required if the above is not met
 Standalone Server Hardware recommendations
Application
Only SAL GW
Only SLA Mon
Both SAL GW and SLA Mon
Minimum
2 GB
4 GB
4 GB
RAM
Recommended
4 GB
8 GB
8 GB
Minimum
single core
dual core
dual core
CPU
Recommended
dual core
quad core
quad core
Hard Drive Free space
Minimum
Recommended
10 GB
40 GB
40 GB
180 GB
50 GB
220 GB
The disk space requirements that will be checked by the ADS R2 Installer
If /opt and /var are located in same partition then check “free” space as follows:
Partition
Minimum
Recommended
"/"
50 GB
220 GB
If /opt and /var are located in two different partitions then check “free” space as follows:
/opt/
10 GB
20 GB
/var/
40 GB
200 GB
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16
March 25 – 27th, 2014 І Orlando, FL
Network Monitoring and
Endpoint Diagnostics
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March 25 – 27th, 2014 І Orlando, FL
SLA Mon™ Agent Enablement
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Enable the Agent in ERS and VSP Switches
 Enable the agent and assign an IP address.
 By default the agent uses the switch/stack IP address if a specific
agent address is not configured.
 Note: Commands are common across ERS 3500, 4000, and
5000 families.
 To view current configuration:
enable <enter privileged exec mode>
show application slamon agent
 To configure SLA Mon agent:
enable
configure terminal
application
slamon agent ip address {A.B.C.D}
slamon oper-mode enable <enable the agent>
slamon server ip address {A.B.C.D}
 See this deck’s appendix and networking product
documentation for full listing of SLA Mon-related commands.
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19
Configuring SLA Mon via ACLI (continued)
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March 25 – 27th, 2014 І Orlando, FL
Agent Discovery
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21
Obtain Network
Topology
The ultimate objective is to create a logical
topology within SLA Mon that matches the
physical network topology. This requires
knowing the network topology and where the
agents are located in that topology.
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22
Discover the Agents
1. Populate location.
2. Add an IP address range to
scan for agents. Add a zone
designation (optional).
3. Select one or more ranges
previously entered, and run
discovery.
SLA Mon polls all the IP
addresses in the range to
discover agents. This is
surprisingly quick.
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23
Discover the Agents (zoom in)
/21 is the smallest mask permitted. This particular entry scans 10.1.0.1 thru 10.1.7.255 to discover agents. This is nothing more
than an IP address range. It implies nothing about how this range is subnetted in the network. The individual subnet information
(subnet mask and default gateway) is received from the agents.
Warning: Zone assignments made here overwrite the zone
assignments on the Zone Management page.
Santa Clara’s IP address range is large enough
that it requires 4 discovery entries. The other
cities only require a single entry.
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Creating zones for the cities puts the
individual IP subnets into a display grouping,
explained in coming slides.
24
See Discovered Agents
All discovered agents
are listed.
In Beta2 & GA loads:
Blank means
discovered; icon means
manually disabled.
Note: In ADS 2.5 we will
add a heartbeat
mechanism and return
the colored icons to
indicate the health &
reachability of the
agents.
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25
March 25 – 27th, 2014 І Orlando, FL
Test Administration
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Set DSCP Values
Set the values used in the
enterprise.
Check if enterprise uses video;
uncheck otherwise.
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27
Set Alarm Thresholds
180ms is the commonly accepted value for one-way delay.
These are commonly accepted values
for jitter and loss, though perhaps a
bit low in practicality.
e-MOS is estimated mean opinion
score, calculated using the ITU-T
G.107 recommendation.
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Set based on the enterprise’s
tolerance levels.
An alarm is triggered if the
threshold is breached this
many times in an hour span.
4.0 - 4.5 is considered PSTN toll quality. Down
to 3.6 is considered business quality.
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28
Create a Test Pattern
3. Maximize these unless you’re concerned
about too much test traffic on the network.
1. Add new pattern name.
2. Select test pattern for
editing.
Test runs for 1sec, data is compiled and sent to SLA Mon
server (takes up to 2sec), and test runs again. This cycle
may vary depending on how many total tests the SLA Mon
server is managing.
For each test pair, the G.729 pattern puts roughly one G.729 call’s
worth of traffic (<30kbps) onto the network. Likewise the G.711
pattern puts <100kbps onto the network.
4. Select G.729 or G.711 (G.729 recommended for most cases).
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29
Add Tests Manually to the Pattern
Select subnet1 and subnet2 and add test pair.
Repeat as necessary. Save pattern.
All 3 traffic types are added.
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30
Add Tests Using Bulk Tool
1. Select the default pattern, which is a full-mesh pattern.
2. Export the full-mesh pattern to a
spreadsheet.
3. Manually prune the spreadsheet.
4. Import the pruned spreadsheet test pattern
into a new pattern and save the pattern.
The default test pattern is 1) all zones to all zones (full mesh of zones); 2) full mesh of
subnets within a zone; 3) full mesh of subnets not assigned to a zone; 4) full mesh of
unassigned subnets to zones (subnet to zone tests).
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31
Execute Test Pattern
Stop the current test pattern, select
a new pattern, and start.
View test pairs for selected
test pattern.
Errors could be caused by:
• Agent malfunction, or agent down.
• Not enough agents in a subnet.
• Communication path disrupted between SLA
Mon server and agent.
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32
March 25 – 27th, 2014 І Orlando, FL
Network Performance Monitoring
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Summary Matrix for Multiple Test Pairs
Rows and columns are numbered, but only the
rows are labeled with the subnet or zone.
Select traffic type and
measured traffic parameter.
Color Code:
Prune the matrix by
selecting locations/zones to
view.
Click on a cell to see the
details of that test pair.
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• Green: all tests in past hour were
below threshold.
• Amber: at least one test in past
hour exceeded threshold, but
not the latest test executed.
• Red: latest test executed
exceeded threshold.
• Grey: no test administered.
• Black: unable to execute
administered test; agent or
network down, or agent in
distress.
• Blue: zone, click to see intrazone test results.
• White: location to same location
test not applicable.
34
Agent/Network Down vs. Agent in Distress
Select the “Failed” traffic
parameter.
Black means no agents on that
subnet could be reached to
execute the test – agent(s) or
network down.
Red means the agent could be
reached, but test execution failed
– agent is malfunctioning or
overloaded with tests. In this case
SLA Mon will attempt to find
another agent to execute the test.
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35
Detailed Matrix for a Specific Test Pair
For the past hour, all of the traffic type and traffic parameter
combinations from the summary matrix are shown here for this specific
test pair. Color codes are the same as the summary matrix.
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36
DetailedGraphs
Select time period to view, up to 5 days and
down to 5min (default last hour).
both directions graphed
Select traffic parameter and
traffic type.
administered
thresholds
To view a specific time window within the graph, zoom in and out with
a mouse click-drag-release motion. Double-click to return to full graph
view for selected date/time period.
Mouse over a spot on the graph (cross hairs will
appear) to see specific data on that point.
network performance plot
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37
Hop-by-Hop QoS Monitoring
Audio traffic left marked as DSCP 46.
Changed to 0 at first hop. No more QoS
treatment from that point on.
Temporarily changed to match the
service provider’s class of service
markings while in the MPLS cloud.
This is a common practice.
both directions charted
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Traceroute is the underlying utility
used to monitor hop-by-hop QoS,
and it is possible for the router or
destination endpoint to not respond
to the traceroute.
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38
March 25 – 27th, 2014 І Orlando, FL
SWITCH Bypass Mode
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EDM SLA Monitor Configuration Menu
Navigate to Configuration  Serviceability  SLA Monitor
Select NTR or RTP to setup of
desired test
Mandatory options
IPv4 only
If values are unchanged stack/
switch IP and default port will be
used
Avaya Diagnostic Server
Configuration options not
required for bypass mode
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40
SLA Mon Bypass Testing
EDM - NTR Testing
Select NTR  Insert to configure
NTR test
To Run Select desired test
OwnerId and Results
Insert NTR test configuration
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41
SLA Mon Bypass Testing
EDM - NTR Test Results
NTR configuration displayed
Test results
Important: When executing the script using EDM, do not run other commands while the script is in
progress, because this slows down the execution. EDM can time-out while waiting for a response and
even when a time-out occurs, the script execution continues on EDM.
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42
SLA Mon Bypass Mode
ACLI – NTR test configuration and results
 Results displayed after ntr command issued:
3524GT-PWR+(config-app)#slamon ntr 47.17.25.119 46 attempts 2 period 200000
Default values will be used
if values not set
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March 25 – 27th, 2014 І Orlando, FL
Alarming
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ADS 2.0 – Alarming
 Two administrable tabs are available in the SLA Mon
server that are related to alarming.
 SNMP Traps tab – Used to define an SNMP trap destination,
alarm generation, and alarm severity.
 Alarming tab – Used to configure “Thresholds” and “Strike” rates
against network Delay, Jitter, Packet Loss, and e-MOS.
 The SNMP Traps tab is where you define which alarms
should be sent out as traps as well as where you assign
severity to that category of alarm.
 You can configure different alarm rules per NMS
destination.
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45
ADS 2.0 – Alarming Diagram
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46
ADS 2.0 – Monitoring and Diagnostics (Continued)
SLA Mon – SNMP Traps
 Access the SNMP Traps tab via “Admin  SNMP Traps”
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47
ADS 2.0 – Monitoring and Diagnostics (Continued)
SLA Mon – SNMP Traps [Add New]
 Enter the IP address of the NMS server or SAL gateway then click “Add
New”
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48
ADS 2.0 – Monitoring and Diagnostics (Continued).
SLA Mon – SNMP Traps [Trap Details]
 Define your NMS and alarming details.
NMS server details
[Blue]
Alarm generation
and severity details
[Red]
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49
March 25 – 27th, 2014 І Orlando, FL
Problem Scenario Revisited
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Problem Scenario
New Hires Report Degraded Video Quality to IT During Recent Video Training
Sessions
New Hires
HQ
New Hires
Paul
1. An Insurance company regularly conducts remote PC-based video training exercise for their new hires across multiple sites that
don’t require the use of Avaya IP phones.
2. The company streams video from a central training system at HQ to New Hires at each of the remote sites.
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51
Use Case SLAMon™
New Hires Report Degraded Video Quality to IT During Recent Video Training
Sessions
Agent
Agent
Ethernet Routing
Switch
Ethernet Routing
Switch
HQ
New Hires
SLA MonTM Server
Paul
New Hires
Network
Monitoring
Agent
Endpoint
Diagnostics
Ethernet Routing
Switch
1. An Insurance company regularly conducts remote PC-based video training exercise for their new hires across multiple sites that
don’t require the use of Avaya IP phones.
2. The company streams video from a central training system at HQ to New Hires at each of the remote sites.
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52
Use Case SLAMon™
New Hires Report Degraded Video Quality to IT During Recent Video Training
Sessions
Agent
Agent
Ethernet Routing
Switch
Ethernet Routing
Switch
HQ
New Hires
SLA MonTM Server
Paul
New Hires
Network
Monitoring
Agent
Endpoint
Diagnostics
Ethernet Routing
Switch
1. The New Hires have complained that in the past training sessions, some sites (but not all) have experienced
degraded video quality during the sessions.
2. Each of the remote sites and their HQ have Avaya Ethernet switches and they have an SLA Mon server at HQ.
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53
Use Case SLAMon™
New Hires Report Degraded Video Quality to IT During Recent Video Training
Sessions
Agent
Agent
Ethernet Routing
Switch
DSCP 26
New Hires
Ethernet Routing
Switch
DSCP 0
HQ
New Hires
Agent
SLA MonTM Server
Paul
Network
Monitoring
Ethernet Routing
Switch
Endpoint
Diagnostics
1. Paul uses Network Monitoring feature of SLA MonTM Server to review historical data and sees that there is some delay
between the HQ and Branch site link.
2. He looks at the Hop by Hop QoS reports and sees that the DSCP of the video traffic is being remarked at some point.
3. He knows that he has configured the video traffic to DSCP 26 but somehow it’s being remarked to 0 and therefore not
getting preferential treatment.
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Use Case SLAMon™
New Hires Report Degraded Video Quality to IT During Recent Video Training
Sessions
Agent
Agent
Ethernet Routing
Switch
DSCP 26
New Hires
Ethernet Routing
Switch
DSCP 26
HQ
New Hires

Agent
Ethernet Routing
Switch
Paul
Service Provider
1. He calls the SP to ask what is happening. After the SP investigates, they realize that they had not configured the
network to give preferential treatment to video traffic and fixed the error. Problem solved!
2. The next training session goes off without any problems.
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Network Monitoring – Release 2 (2014)
Empowers Customers with Proactive Tools
Provides Customers with Early Warning Signs for Preventative Actions
 Intelligent, proactive agents embedded in Avaya equipment
 Local Interface delivers end to end network visibility for voice, video and data
traffic
 Identifies and isolates QoS problems across each network hop using
synthetic sessions and defined traffic priority levels
 Provides graphical reporting of latency, delay, jitter, and estimated MOS
 Proactive Alarms based on thresholds sent to multiple destinations –
enterprise NMS, Avaya
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BEST OF ATF
SPEAKER AND TEAM AWARD
BE SURE TO
TWEET YOUR FEEDBACK
ON THIS PRESENTATION
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Winners will be announced at closing of event
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March 25 – 27th, 2014 І Orlando, FL
Zone Management
(Optional)
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Zone Management
If agents were discovered on the Discovery tab w/o a zone
designation, they can be assigned to a zone after discovery.
Likewise, a zone assigned at discovery time can be changed after
discovery.
2. Select zone to add subnets to.
1. Add new zone name.
3. Assign all IP subnets in the city
of Sacramento to zone
“Sacramento.”
5. The selected IP subnets will
appear in the Sacramento
zone and be grouped for
display.
4. Or add individual IP subnets in
the city of Sacramento to zone
“Sacramento.”
Note: SLA Mon identifies IP subnets by the default gateway
reported by the agent, instead of the familiar network/mask
designation. This may change in the future, but for now this is
how IP subnets are identified.
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Warning: Any zone changes made here do not transfer to the
Discovery tab. If agents are re-discovered on the Discovery
tab using the previous discovery entries, they will overwrite
the zone assignments on this page.
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Zones Explained
 A zone is a way to group IP subnets for display purposes, to more easily see
inter-zone test results and intra-zone test results.
 We can create a zone of one city. The IP subnets in the Santa Clara office can
be grouped into a zone called “SantaClara_Zone.”
 We can also create a zone of multiple cities.


We can create a California zone and a Texas zone and put select cities into each zone.
Or we can create a USA zone and an Australia zone and put select cities into each
zone.
 We can create zones within the same city.



Within a college campus in one city, we can create an “Engineering” zone and a “Fine
Arts” zone and a “Sociology” zone.
Within a corporate campus we can create a “Bldg A” zone and “Bldg B” zone.
Within a large building we can create a “Floor 1” zone and a “Floor 2” zone.
 An administrator can create zones to suit the purposes of the enterprise, to make
the network performance displays more manageable.


We want to see at a high level the tests between the zones.
We want to see separately the tests between subnets within a zone. To do that we drill
down into that zone.
 This grouping is only for display purposes. All tests are between IP subnets, not
between zones.
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Summary View of Locations and Zones
5x5 summary matrix of a
network that contains 5
locations, 2 of which are
zones:
- Europe zone
- North America zone
- Bangalore subnet
Click on blue cell
to drill into zone.
- London subnet
- Sydney subnet
There is a full mesh of network tests running, from every location to every
location. (These tests will be explained in more detail later.)
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Drill into the Zones
When we drill into the North America
zone we see that there are two subnets
– Montreal and Sacramento.
When we drill into the Europe zone we
see that there are two subnets –
Munchen and Salzburg.
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Zone Limitations
 The zone hierarchy is limited to one level.
 We cannot create a zone consisting of multiple zones.
 Right now we don’t anticipate a need for this.
 Only one test can be created between a zone pair.
 This is an intentional limitation.
 Suppose we try to create these two tests:
 10.1.1.1 (SantaClara_Zone) to 10.10.1.1 (Toronto_Zone)
 10.1.2.1 (SantaClara_Zone) to 10.10.2.1 (Toronto_Zone)
 The second test will be blocked by SLA Mon.
 Because we segregated the display into zones, we cannot show multiple test
results for the same zone pair.
 If there were no zones, these tests would be permitted as individual subnet tests.
 The zones need to be created such that only one test is required for any zone
pair.
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March 25 – 27th, 2014 І Orlando, FL
Appendix: ERS Commands
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Avaya.
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Configuring switch-based SLA Mon agent via ACLI
 Note- commands are common across ERS3500, 4000, 5000 families.
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Configuring SLA Mon via ACLI cont.
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Configuring SLA Mon via ACLI cont.
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Configuring SLA Mon via ACLI cont.
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Configuring SLA Mon via ACLI cont.
Note- Bypass mode is used to run tests
between two switches without an SLA Mon
Server. This operation is not covered in the ADS
R2 KTK. Refer to ERS3500 5.1.1 or ERS5600 6.6
Troubleshooting Technical Transfer for
guidance to running Bypass mode
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Configuring SLA Mon via ACLI (Continued)
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Configuring SLA Mon via ACLI cont.
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Summary of SLA Mon Agent commands via CLI
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