Just thought I would share a little gem I learned today. Way back in the day I worked for an ISP and router on a stick was our bread and butter lol.
At my new job we had a new site turn up where they only wanted internet connectivity, so they ordered a isr4331 and a cat9k switch. I was on vacation and they asked me to whip up some quick configs, which I did. Super simple setup with like 5 sub interfaces for wired, guest wifi, user wifi, ect.
It didn't work, could trace and ping all day long but browsing didn't work. checked my config 100 times and couldn't figure it out. Got off vacation today and called Cisco and in 14 seconds they found the issue. I was doing the NAT overload to a pool, IOS-XE it accepts the command but it doesn't work. You have to overload an interface.
Moral of the story... no matter how easy it is, read the configuration guide of the platform you are using and don't assume anything haha.
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