There are a couple of things that I would comment about your question.
First it is not clear whether the issue about not resolving DNS is a symptom on the router or a symptom on the PC on the LAN interface of the router. I am assuming that it is an issue on the PC. Therefore we would need to know how the PC is configured. In particular we need to know what the PC has configured for DNS server (the PC will not use the name servers configured on the router - unless the same name servers are configured on the PC).
Second if this is not a live network but something that you are using to study for certs, are the name servers that are configured really functioning as name servers.
Third you talk about being able to ping WAN IP but are not clear whether the address you are pinging is the address of the name server or some other WAN address.
Fourth the reason that you can ping from the PC but not from the router may have to do with the fact that you have done address translation for the PC address making it the same as the router interface address. Since there will be an entry in the translation table when a response is received from the outside with destination address of 172.16.0.117 the router is probably translating that address and forwarding it to the PC. Try changing the static translation to be 172.16.0.115 and see if it works better.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
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