SD-WAN

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Ask questions and share experiences with SD-WAN and Session Smart Router (formerly 128T).
  • 1.  Inline Flow Performance Monitoring

     
    Posted 11-04-2021 11:44
    In 5.0, In-line Flow Performance Monitoring was added to the Session Smart Router:

    • I95-32558 In-line Flow Performance Monitoring: Inline performance metrics have been enhanced to achieve a finer granularity than what is currently available via BFD. Statistics are now collected per path, traffic class, and protocol (TCP or UDP) level. Sessions can be forwarded using more granular SLA metrics.

    How does it work and how do I turn it on?

    ------------------------------
    Justin Melloni
    Technical Trainer
    ------------------------------


  • 2.  RE: Inline Flow Performance Monitoring

    Posted 11-05-2021 09:40
    Would love to know, do tell!

    ------------------------------
    Andrew Schaefer
    CTO
    ------------------------------



  • 3.  RE: Inline Flow Performance Monitoring

     
    Posted 11-09-2021 11:51
    Inline Flow Performance Monitoring complements BFD in measuring "peer paths" between two SSR devices. It does it by through the inclusion of  a small amount of metadata by the initiating router to a sample of packets (how often the sampling occurs is configurable), which is deciphered and reported back by the recipient router. The advantage of FPM data is that it's organized by traffic-class (high/medium/low/best-effort). This gives more granular data on the performance of a link -- not just through synthetic traffic (BFD) but by piggybacking onto actual user traffic.

    The configuration is very simple:
    admin@labsystem1.fiedler# show config running authority performance-monitoring-profile verbose wan-assurance-monitoring-profile
    
    config
    
        authority
    
            performance-monitoring-profile  wan-assurance-monitoring-profile
                name               wan-assurance-monitoring-profile
                marking-count      100
                interval-duration  10000
                monitor-only       true
            exit
        exit
    exit​
     The configurable fields here govern how many packets (marking-count) are marked during a given time window (interval-duration).

    Once you've had it running for a while, you can see the results using the command show stats performance-monitoring:
    admin@labsystem1.fiedler# show stats performance-monitoring router all force
    Tue 2021-11-09 11:19:51 EST
    ✔ Retrieving statistics...
    
    Highway Manager Performance Monitoring Stats
    --------------------------------------------
    
    =================== =========== ======== =========== ================ ============= ====== =============== ========== ============
     Metric              Router      Node     Peer-name   Peer-host        Device-name   Vlan   Traffic-class   Protocol        Value
    =================== =========== ======== =========== ================ ============= ====== =============== ========== ============
     peer-path jitter    natick      flutie   greyhaven   10.65.228.68     enp1s0f3         0   low             udp                21
                                     flutie   greyhaven   10.65.228.68     enp1s0f3         0   medium          udp                12
                                     flutie   greyhaven   192.168.2.101    enp1s0f3         0   low             udp                 4
                                     flutie   greyhaven   192.168.2.101    enp1s0f3         0   medium          udp                51
                                     flutie   westfield   10.0.0.41        enp1s0f3         0   medium          udp                 0
                         westfield   monty    natick      108.20.166.32    enp1s0           0   medium          udp                 1
                                     monty    natick      108.49.110.151   enp1s0           0   medium          udp                 0
     peer-path latency   natick      flutie   greyhaven   10.65.228.68     enp1s0f3         0   low             udp                78
                                     flutie   greyhaven   10.65.228.68     enp1s0f3         0   medium          udp                64
                                     flutie   greyhaven   192.168.2.101    enp1s0f3         0   low             udp                45
                                     flutie   greyhaven   192.168.2.101    enp1s0f3         0   medium          udp               113
                                     flutie   westfield   10.0.0.41        enp1s0f3         0   medium          udp                18
                         westfield   monty    natick      108.20.166.32    enp1s0           0   medium          udp                15
                                     monty    natick      108.49.110.151   enp1s0           0   medium          udp                 0
     peer-path loss      natick      flutie   greyhaven   10.65.228.68     enp1s0f3         0   low             udp                 0
                                     flutie   greyhaven   10.65.228.68     enp1s0f3         0   medium          udp                 0
                                     flutie   greyhaven   192.168.2.101    enp1s0f3         0   low             udp                 0
                                     flutie   greyhaven   192.168.2.101    enp1s0f3         0   medium          udp                 0
                                     flutie   westfield   10.0.0.41        enp1s0f3         0   medium          udp                 0
                         westfield   monty    natick      108.20.166.32    enp1s0           0   medium          udp                 0
                                     monty    natick      108.49.110.151   enp1s0           0   medium          udp               100
     peer-path mos       natick      flutie   greyhaven   10.65.228.68     enp1s0f3         0   low             udp               434
                                     flutie   greyhaven   10.65.228.68     enp1s0f3         0   medium          udp               436
                                     flutie   greyhaven   192.168.2.101    enp1s0f3         0   low             udp               438
                                     flutie   greyhaven   192.168.2.101    enp1s0f3         0   medium          udp               412
                                     flutie   westfield   10.0.0.41        enp1s0f3         0   medium          udp               440
                         westfield   monty    natick      108.20.166.32    enp1s0           0   medium          udp               440
                                     monty    natick      108.49.110.151   enp1s0           0   medium          udp               100
     peer-path updated   natick      flutie   greyhaven   10.65.228.68     enp1s0f3         0   low             udp        1636474788
                                     flutie   greyhaven   10.65.228.68     enp1s0f3         0   medium          udp        1636216599
                                     flutie   greyhaven   192.168.2.101    enp1s0f3         0   low             udp        1636474188
                                     flutie   greyhaven   192.168.2.101    enp1s0f3         0   medium          udp        1636216603
                                     flutie   westfield   10.0.0.41        enp1s0f3         0   medium          udp        1636466059
                         westfield   monty    natick      108.20.166.32    enp1s0           0   medium          udp        1636466059
                                     monty    natick      108.49.110.151   enp1s0           0   medium          udp        1636025768​


    ------------------------------
    Patrick Timmons
    Vice President of Customer Success
    ------------------------------



  • 4.  RE: Inline Flow Performance Monitoring

    Posted 11-11-2021 10:17
    Hi,
    I am running 5.2.2 and I am not seeing any output data. I have 

    admin@node1.conductor1# show config running authority performance-monitoring-profile wan-assurance-monitoring-profile
    
    config
    
        authority
    
            performance-monitoring-profile  wan-assurance-monitoring-profile
                name               wan-assurance-monitoring-profile
                marking-count      100
                interval-duration  10000
                monitor-only       true
            exit
        exit
    exit​
    But, even after several hours and sessions coming and going, I am not seeing any data...

    admin@node1.conductor1# show stats performance-monitoring router all force
    Wed 2021-11-10 18:56:58 UTC
    ✔ Retrieving statistics...
    No stats found
    Completed in 0.16 seconds
    admin@node1.conductor1#​

    What am I missing? Thanks!


  • 5.  RE: Inline Flow Performance Monitoring

     
    Posted 11-11-2021 12:01
    You also need to ensure that the profile is applied to your peer paths. This is generally configured through router > node > device-interface > network-interface > neighborhood. Please apply the profile to both sides of the SVR peer path.

    ------------------------------
    Patrick Timmons
    Vice President of Customer Success
    ------------------------------



  • 6.  RE: Inline Flow Performance Monitoring

     
    Posted 11-11-2021 10:17
    This is great @peetee thank you!

    Can I use this information to prefer a path like I can with the BFD measurement? For example, choose my broadband path based on the MOS as determined by the FPM?​

    ------------------------------
    Justin Melloni
    Technical Trainer
    ------------------------------



  • 7.  RE: Inline Flow Performance Monitoring

    Posted 11-12-2021 14:49
    Thanks  @peetee .Which one will be used to measure SLA when we have both BFD and IFPM configured.​​​

    ------------------------------
    BHASKAR GADDAM
    ------------------------------



  • 8.  RE: Inline Flow Performance Monitoring

    Posted 11-12-2021 14:49
    Thanks @peetee . Which one will be use when we have both BFD and FPM on routers?​

    ------------------------------
    BHASKAR GADDAM
    ------------------------------