Understand What is Going on With Your Stream -Troubleshooting IP Delivery Network Related Problems

Presenters : Adi Rozenberg - Alvalinks

Year : 2022

dlp_document_download : Understand what is going on with your stream Troubleshooting IP delivery network related problems Adi Rozenberg, Alvalinks Introduction to Alvalinks Alvalinks was founded by Broadcast and Networking veterans to bring innovation Alvalinks focus on simplifying the road to the cloud and in the cloud, by way of delivery supported by AI toolset Alvalinks is a VSF member Adi Rozenberg is a long-time technology contributor to the RIST specifications Understanding what is going on with my Stream Why good transport is so important? Why should I care? What do I need to know? What do I need to do? How do I achieve that? This presentation will address these questions style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y Start Maps Travelers DREW coast lines, rivers, cities, landmarks and areas to PASS or AVOID Compass Gave us better DIRECTION GPS Use the global positioning to pin point and find the best route with traffic alerts for ON TIME delivery Cloud Now IP is the new highway, where are the MAPS? COMPASSES? ASSITANCE? Business success Landmarks Someone told us to FOLLOW rivers, coast lines and land features to get to our destination Stars Vikings told us to FOLLOW the North star Light house People BUILT Lighthouses to assist us Why transport is so important? In the past we needed to invent guidance tools to reach our destination How do we do the same in the cloud Era? style.visibility ppt_w ppt_h style.visibility style.visibility style.visibility style.visibility ppt_w ppt_h style.visibility style.visibility style.visibility style.visibility ppt_w ppt_h style.visibility style.visibility style.visibility style.visibility ppt_w ppt_h style.visibility style.visibility style.visibility style.visibility style.visibility style.visibility ppt_w ppt_h style.visibility style.visibility style.visibility style.visibility ppt_w ppt_h style.visibility style.visibility style.visibility style.visibility ppt_w ppt_h style.visibility style.visibility style.visibility style.visibility style.visibility style.visibility ppt_w ppt_h style.visibility style.visibility style.visibility style.visibility ppt_w ppt_h style.visibility style.visibility style.visibility ppt_x ppt_y Internet vs Fiber Fiber is similar to a train Reliable, single track Piece of mind Internet is similar to car traffic You have choices and options But you also have other users and traffic to consider HOPE REALITY style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y Why should I care IP based transport is becoming the new backbone of our industry with RIST, SRT, NDI, JPEG XS and ST2110 protocols fueling new applications, cloud workflows and a true enablers of the next technology leap to the cloud. Networks are complex "living organisms" that are dynamic and have unpredictable behavior and performance. Control or visibility - the cloud is yet another challenge that we need to overcome; it is increasing dramatically with scale, sites,  interconnection between networks, and the integration of cloud operations – those are not under our control or visibility . style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y What is so different this days? Remember the good old days? ASI was a SIMPLE point to point Satellite gave you ASSURED delivery and distribution Fiber was PRIVATE NOW , You are a part of a growing community of users Other departments in your organization have some business in the cloud ( production, storage, SaaS etc ) Network may be shared by other organizations and streams Over time the network will be come crowded style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y Ask Yourself: Did the IT get the E-mail on time ? Did they open the ports ? Did they setup the QOS ? Did they secure the right SLA for me? Do you have the right bandwidth ? Did the DevOps guys took care of the cloud ingest? If the Answer is NO – you may be in trouble But my IT takes care of these, no ? style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility Isn’t reliable streaming enough? SRT, RIST, NDI and proprietary transport protocols have a share tasks: Reliable delivery Secure delivery On time output They are based on the assumption that the network is there. It is your task to guaranty this all the time style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y What do I need to know in advance? Connectivity Can I reach my destination? Do I have the correct open ports My available network paths RTT Number of Hops Time to every hop MTU limits Packet loss Jitter Upload/download speed : max bitrate without errors, max bitrate with errors, packet loss, jitter Abnormal artifacts for example ; other flows, time interferences, network behavior etc. What do I need to do while streaming? Remember: you are NOT alone You need to identify whatever may cause your stream to slowdown or breakdown: RTT increase Number of hops increase/decrease Jitter increase Packet loss increase Additional flows going from the source or entering the destination Seamless switching delay style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y What should I Keep track of? Number of hops – detect network routing changes RTT – detect delay that may impact Jitter events, ARQ recovery SMPTE2022-7 delay Number of Packet loss in a window of time Packet loss behavior – salt and pepper vs burst Jitter increase – watch out for impact of packet loss Multiple retries – reverse link issues or increase on pkts loss Link bandwidth changes – cause excessive loss Other flows on your links – bandwidth consumption What are the option in my bag of tricks to identify a problem Nmap – test open UDP/TCP ports in the destination Firewall Ping – test RTT, sample packet loss ( poor results ) TraceRoute / Tracepath – test number of hops, RTT based on Ping for each hop Iperf – test upload speed, max bandwidth, Packet loss and Jitter Tcpdump – capture packet and detect other flows Vnstat – report on Rx/Tx bitrate and packet rate to detect bandwidth drop Protocol specific reports of bandwidth, packet loss, packet rate How do we isolate and avert it a problem Trust and Verify everything before starting any live stream Use more than one Link to assure redundancy Monitor the stream behavior Watch for packet loss : spread or burst Unrecovered events Jitter increase RTT reports Unknown flows Test the link bandwidth from time to time Don’t allow your connection to go wild on you style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y style.visibility ppt_x ppt_y Adi Rozenberg, CTO Adi.Rozenberg@Alvalinks.com Any Questions?