I have a routing situation that to me seem's to be set up correctly. My customer is telling me that he thinks how I've set it up is wrong.
The customer is saying he's unable to reach some of the lab's subnets in the allocated /21 from the LAN. He believes I can't have a single route pointing at the 10.10.20.0 /21 because he has it divided into multiple smaller subnets inside his lab. He believes I need to put a static route for every single subnet he has on the LAN edge router. I don't believe that is the case. The remote sites are using subnets carved out of that /21 as well, but there are more specific routes for those networks, so I don't think that's an issue either.
I've done traceroutes from the edge router and they always go the right way.
I'm not 100% sure what the issue is on his side, he's not really willing to provide me with exact details or configurations. I just want to be sure my end is set up ok.
If my side is right, does anyone have a theory on what he may be doing wrong inside the lab? He is using the 10.10.20.0 /24 as his core subnet. Could that cause any issues in this case?