I power cycled both Optik 4K boxes and problem persists.
Have you substituted your own router? The behaviour you describe has happened to many folks who switched from the Telus router to their own.
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Despite extensive searching I cannot find a guide or detailed information on how to set this up for Telus Optik boxes on your own network equipment LAN ?
Unless your router supports multicasting it won’t work for Optik TV. Your options are use the Telus supplied router/modem for Optik TV. Or purchase a router that supports multicasting. It’s then as easy as enabling it.
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If all my Telus Optik boxes are hard wired and setup to multicast, do all they all need to be on a separate VLAN?