Thursday, October 18, 2018

Do ISPs specifically de-prioritize SDWAN traffic?

Stumbled on this as I did some diving in wireshark today:

Inbound Internet traffic, directly from the Comcast cable modem, to one of our VeloCloud boxes, is marked DSCP8/CS1 scavenger.

Got me wondering: is Comcast intentionally de-prioritizing SDWAN traffic as a competitive tactic?

The CS1 traffic was all 2426/udp, which is an IANA-registered port for VeloCloud's Multipath protocol.



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