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Realtime Application QOS Monitoring (RAQMON)

57th IETF Session – ViennaRMON Work Group

Anwar Siddiqui, Dan Romascanu, Eugene Golovinsky

<draft-ietf-rmonmib-raqmon-framework-02.txt> <draft-ietf-rmonmib-raqmon-pdu-02.txt><draft-ietf-rmonmib-raqmon-mib-01.txt>

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Changes/Updates/Modification from last drafts

– Editorial Changes & clean up

– Metrics Definition – Each Metrics is referenced

– Architectural Definitions upfront in the document

– BASIC PDU and APP PDU is merged into one RAQMON PDU

– Mapping RAQMON PDU to SNMP (RDS RRC)– Encoding RAQMON PDU by using the RAQMON RDS MIB

– Congestion Awareness Section

– Clarify extensibility

– Enhanced Security Sections

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RAQMON Framework Overview Simultaneous Voice, Text, Collaboration

SRTP/RTCP

RSVP/NSIS

Proxy (SIP) Gatekeeper (h.323) MGC (MGCP)

Signaling

over TLS TLS

UDP or DCCP

IEEE 802.1p/Q, IEEE 802.11e

Email Server1

2

6

DiffSrv = EF

3

4

5

RRCRRC

RAQMON PDU (RTCP OR SNMP)

RAQMON PDU

1 Task (VoIP)

PDA2 Tasks

(VoIP, Email Synch)

4 Simul. Tasks (VoIP,

Web Collaboration, IM,

FTP)

RRC MIB

- Signaling (Time to establish session?) - Media (how did it sound?) - Host (limited by Host CPU)

RMON MIBRRC MIB RMON MIB

Communication Data Forwarding Path

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RAQMON Framework Overview Instant Messaging

Secure Text Relay

Proxy (SIP) AIM

XMPPSignaling

over TLS TLS

UDP or DCCP

1

2

RRCRRC

RAQMON PDU (RTCP OR

SNMP)

RAQMON PDU

1 Task (Instant

Messaging)

1 Task (Instant

Messaging)

RRC MIB RMON MIBRRC MIB RMON MIB

Communication Data Forwarding Pathanwarsanwars

Does Instant Messaging and WebEX cares about Jitter?

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RAQMON Framework Definition

RRC

Scope of the Framework

SNMP

RAQMON MIB

RDS RDS

X End DeviceEnd Device

RAQMON PDU is Out of Communication Data Forwarding Path

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UNDERLYING TRANSPORT

(RTCP, SNMP)

1

2

Communication Data Forwarding Path

RDS/RRC RAQMON PDU Path

(e.g. RTCP, HTTP, FTP, TLS, SIP, H.323)

Communication Data Forwarding Path

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Functional RAQMON Architecture

Communication NetworkIP

PSTNCellularOptical

RAQMON Report Collector

(RRC) # 1RAQMON MIB

(IP Address, port)

1. Context-sensitive Framework VoIP vs. Instant Messaging vs. XXXX 2. Transport Network Condition Specific Metrics Jitter3. Network Policy Specific RSVP Failed, Diffsrv = EF 4. Communication Session Related QoS Session Setup Delay/Duration5. Device Sate Specific Metrics CPU Usage

Variable Metrics list Updated using RAQMON PDU

                        

SNMP

Management Application

IP End Device

RAQMON Data Source (RDS)

APPLICATION

Transport Protocol Agnostic

Extensible/Programmable Data Model

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RAQMON PDU Overview

One RAQMON Application level PDUs to have “common formats” for reporting statistics

RAQMON PDUs will be transported over existing protocols– RTCP (APP PT = 204 from RFC 1889 or XR Report)– SNMP (NOTIFICATION)

RDS and RRC as Peer-to-Peer entities– RDS reports what “IT” feels to be appropriate for the “application context” – RRC consumes what “IT” feels to be appropriate for the “application context”

RDS RRC communication is “stateless” – RTCP BYE (if using RTCP between RDS/RRC) – TIMER (if using RTCP and SNMP based RRC) – Issue: MANDATORY for compliance?

RAQMON PDU may run over lossy transport – No Error correction or Recovery at RAQMON level– Complementary to IPFIX charter– RDS/RRC Sessions could be engineered to be lossless

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Suggested RAQMON Use Case Examples Based on Application Type

RAQMON PDU for VoIP- Data Source Name (DN) - Receiver Name (RN)- Data Source Address (DA) - Receiver Address (RA) - Data Source Device Port used - Receiver Device Port used - Session Setup Date/Time - Session Setup delay - Session duration- Session Setup Status - End-to-End Delay (Round Trip)- End-to-End Delay (One Way)- Inter Arrival Jitter - Total number of Packets Received - Total number of Packets Sent- Total number of Octets Received- Total number of Octets Sent - Cumulative Packet Loss - Packet Loss in Fraction (in %)- Source Payload Type - Receiver Payload Type - Source Layer 2 Priority - Destination Layer 2 Priority - Source Layer 3 Priority - Destination Layer 3 Priority - CPU utilization in Fraction (in %)- Memory utilization in Fraction (in %)

- Application Name/version

RAQMON PDU for Instant Messaging

- Data Source Name (DN) - Receiver Name (RN)- Data Source Address (DA) - Receiver Address (RA) - Data Source Device Port used - Receiver Device Port used - Session Setup Date/Time - Session Setup delay - Session duration- Session Setup Status - Total number of Packets

Received - Total number of Packets Sent- Cumulative Packet Loss - Source Layer 3 Priority - Destination Layer 3 Priority - CPU utilization in Fraction (in

%)- Memory utilization in Fraction

(in %) - Application Name/version

RAQMON PDU for Pagers- Data Source Name (DN) - Receiver Name (RN)- Data Source Address (DA) - Receiver Address (RA) - Data Source Device Port used - Receiver Device Port used - Session Setup Date/Time - Session duration- Session Setup Status - Total number of Packets Sent- Application Name/version

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RAQMON PDU Size - over time

1st PDU for VoIP- Data Source Name (DN) - Receiver Name (RN)- Data Source Address (DA) - Receiver Address (RA) - Data Source Device Port used - Receiver Device Port used - Session Setup Date/Time - Session Setup delay - Session Setup Status - End-to-End Delay (Round Trip)- Inter Arrival Jitter - Total number of Packets

Received - Total number of Packets Sent- Packet Loss in Fraction (in %)- Source Payload Type - Receiver Payload Type - Source Layer 2 Priority - Destination Layer 2 Priority - Source Layer 3 Priority - Destination Layer 3 Priority - CPU utilization in Fraction (in

%)- Memory utilization in Fraction

(in %) - Application Name/version

2nd PDU for VoIP- Data Source Name (DN) - Receiver Name (RN)- End-to-End Delay (Round Trip)- Inter Arrival Jitter - Total number of Packets

Received - Total number of Packets Sent- Cumulative Packet Loss - Packet Loss in Fraction (in %)- CPU utilization in Fraction (in %)- Memory utilization in Fraction (in

%)

………………..

Nth PDU for VoIP- Data Source Name (DN) - Receiver Name (RN)- Session Setup Duration- End-to-End Delay (Round Trip)- Inter Arrival Jitter - Total number of Packets

Received - Total number of Packets Sent- Cumulative Packet Loss - Packet Loss in Fraction (in %)- CPU utilization in Fraction (in

%)- Memory utilization in Fraction

(in %)

tt1 t2 tn

Avg. MTU ~ 1500 Bytes Recommended

NOTIFICATION upto ~ 490 Bytes

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One Single RAQMON PDU - changes in draft-02

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | V |PDT = 1|B|T|P|I| RC | Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | DSRC | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | SMI Enterprise Code = 0 | Report Type = 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ …………….

…………….…………….

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | …… | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | SMI Enterprise Code = “VENDOR”| Report Type = 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

………….………….………….

RMON Reserved

Vendor Extension

RMON Specified Names/Length

“APP filled Value”

“App filled vendor specific Value”

Vendor Specified Names/Length

RAQMON PDU

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RAQMON PDU Transported Over RTCP or SNMP - changes in draft-02

RAQMON PDU over RTCP– RAQMON PDUs inside RTCP APP Packets per RFC 1889– RTCP XR reports can also be used carry RAQMON PDUs

RAQMON PDU over SNMP– Encoding RAQMON PDU by using the RAQMON RDS MIB – Map the RAQMON PDUs on SNMP Notifications transport

RAQMON PDU

Name=RMON (ascii)

SSRC/CSRC

LengthPT=204Version & subtype

RAQMON specific and

IANA

Registered

RTCP APP Packet

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RAQMON RDS MIB - changes in draft-02

New – in draft-ietf-rmonmib-raqmon-pdu-02.txt Defines mapping of RAQMON PDUs over SNMP notifications

transport raqmonDsNotificationTable - all objects accessible-for-notify raqmonDsNotification

– Mandatory objects– raqmonOneWayEndtoEndDelay – raqmonInterArrivalJitter – raqmonPacketLossFraction

– Other objects in raqmonDsNotificationEntry may be added

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Congestion Safety - changes in draft-02

Use TCP as Transport when possible– Scalability of RRCs may be reduced!

If TCP cannot be used following modes of operation are recommended

a. Constant Transmission Rate– 1 RAQMON PDU every 2 minutes (as good as TCP)– End of communication Session– “Engineered” Constant Rate e.g. 1 PDU every 5 sec

b. Retransmission timers with back offs – Ping/Pongs e.g. Process SNMP INFORMS from RRC

c. By restricting transmission to MTU Size

No more than 10% network bandwidth be used for RAQMON

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RAQMON Extensibility changes in draft-02

RAQMON PDUs is extensible for future

a. SMI Enterprise Code (16 bit)• 0 Reserved for RMON WG• Vendor IDs are allowed for extension

– http://www.iana.org/assignments/enterprise-numbers

b. Report Type (16 bit)• Allows Additional Parameters/Profiles to be added• WG can add new Report Type for SMI Enterprise ID = 0• Vendors can add Any Report Type for Vendor Specific SMI Enterprise ID

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RAQMON MIB – changes in draft-02

Update with PDU structure as defined in the framework draft Removed all data source specific stuff

– Now in the RAQMON-RDS-MIB– Conformance clauses

Clean-up – According to comments in the SF bar-review– Improved definition, DESCRIPTION clauses

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Backgrounder

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RAQMON Context Setting

IP Network

Applications

RTP / FTP/ HTTP

TCP/UDP

MAC IEEE 802.3

PHYSICAL

IP

MAC 802.3

IP

IP End Points Router

PHYSICAL

MAC 802.3

IP

Router

PHYSICAL

Applications

RTP / FTP/ HTTP

TCP/UDP

MAC IEEE 802.3

PHYSICAL

IP

IP End Points

PDAMG

Streaming Media, Transaction, Bulk data transfer etc

Application level priority (e.g. RSVP for S1, but no RSVP for S2)

Various packet level priority ( TOS, DiffServ etc.)

Domain 1

Domain 2 …….

Domain N+1

Multiple Equipment vendors, Multiple geographic locations, Multiple xSPs Control multiple Administrative and Provisioning domain

Domain N

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RAQMON Network Configuration

Telephone

Laptop computer

Telephone

IP Network

Video/IP/IM/Voice

Voice over IP

Router

Media GatewayFax

Wireless Gateway

Regional Report Collector (Periodic Packets to populate MIB)

LAN/VPN INTRANET

Laptop computer

Corporate Network

Application Administrator

Monitoring Applications via

SNMP

PDANetwork /

Application Service Provider

SNMP

SNMP

SNMP

SNMP

Statistics Reported

Telephone

PDABluetooth

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- Data Source Name (DN) - Receiver Name (RN)- Data Source Address (DA) - Receiver Address (RA) - Data Source Device Port used - Receiver Device Port used - Session Setup Date/Time - Session Setup delay - Session duration- Session Setup Status - End-to-End Delay (Round Trip)- End-to-End Delay (One Way)- Inter Arrival Jitter - Total number of Packets Received - Total number of Packets Sent

- Total number of Octets Received- Total number of Octets Sent - Cumulative Packet Loss - Packet Loss in Fraction (in %)- Source Payload Type - Receiver Payload Type - Source Layer 2 Priority - Destination Layer 2 Priority - Source Layer 3 Priority - Destination Layer 3 Priority - CPU utilization in Fraction (in %)- Memory utilization in Fraction (in %)

- Application Name/version

Current set of suggested metrics …..

Parameters “pushed” from RDS to RRC

Framework Accommodates addition of new parameters to the list …..