I apologize but I am not clear with what you are saying here.
Are you saying that the original configuration was set for 1Gig/Full, and that now the same interface(s) are set for Auto-negotiate and are showing up at 1 Gig/Full?
If this is correct do you know when the interface(s) were configured at 1Gig/Full what speed and duplex were they showing up as?
Ref re-checking/testing the circuit, please keep in mindK
1. The customer has production traffic on the circuit so any intrusive testing needs to be coordinated.
2. We are not able to run the RFC-2544 test which showed the initial speed limit without a smart loop at the customer site. This loop was provided from a JasTel EXFO test set in the past.
Due to these requirements it is critical that we verify the circuit is not rate limited to below 200Mbs.
If you feel confident the circuit will support 200Mbs then we will first ask our customer to try testing internally by file transfer as this will not require downtime or a smart loop.