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I am considering purchasing a Deco M5 system. My ISP (dedicated fiber) uses pppoe for connectivity. A search for pppoe on the TP Link user guide yielded no return. I can certainly keep utilizing my ISP's existing router. My question(s) is does the Deco M5 support a configuration that allows me to utilize the existing ISP router? Also, do I have the ability to set custom DNS for the Deco M5 network?

Thanks for any info you can provide.