Some technologies and plans are designed to address the worst-situation scenario. If everything is constantly on the operate normally, then they’ll not be apply, and that’s a great factor. To illustrate Mux Video‘s automatic reaction to network failures when conducting dynamic CDN selection at the beginning of each video playback.
On June 24, at 10:30 UTC, Verizon made an erroneous update for their border gateway protocol (BGP) routing bulletins from the major Internet interchange (AS701) that designed a small ISP in Pennsylvania the most well-liked path for a lot of the web traffic within the Northeastern U . s . States. This brought to significant network congestion and errors, leading to degraded performance for a few of the largest CDNs (Cloudflare, Fastly) and ISPs (Linode, Amazon . com), and as a result affecting those sites and services they host.
This publish will show you how Mux Video performed throughout the incident and just how dynamic CDN selection might help lessen the impact of network outages.
How CDN Switching Works
Mux Video uses Citrix Intelligent Traffic Management (ITM) to recognize the perfect CDN every time a viewer initiates video playback. ITM depends on Citrix Radar data and Mux data metrics collected from vast sums of users all over the world to construct an image of methods the web has been doing across a number of dimensions (CDN, network, geography, etc).
Mux’s ITM setup identifies the network connected using the Ip of every video viewer and selects the perfect CDN for your network according to round-trip-time (RTT) performance data collected by Radar.
A rise in network congestion or errors is symbolized by a rise in RTT measurements. When the RTT for that preferred CDN increases to the stage that it is no more favorable, then Citrix ITM will start recommending another CDN in the group of supported CDNs. We presently make use of the Fastly and StackPath/Highwinds CDNs, and therefore are while adding more.
CDN switching is automatic and driven entirely by alterations in Radar data. It has the advantage of reducing congestion with an already congested path and supplying a faster path for individuals using the alternate route.
How Did Mux Video Perform?
Throughout the outage, RTT performance on AS701 for that Fastly CDN spiked from 11ms to 80ms meanwhile, RTT performance for that StackPath/Highwinds CDN rose only moderately from 12ms to 26ms. We observed disruptions on another Verizon-managed ASN, AS22394.
Citrix ITM started directing Mux Video traffic in the AS701 and AS22394 systems towards the StackPath/Highwinds CDN at 11:00 UTC. We presently make use of a Fastly origin shield before our media origin, so there is a slight handicap put on StackPath/Highwinds to utilize cost and gratifaction benefits of serving from Fastly. However, within this situation the handicap was replaced through the poor RTT occasions around the Fastly network during these ASNs throughout the incident. StackPath/Highwinds still requested the press through our Fastly origin shield surviving in a Fastly point-of-presence (POP) near our origin.
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