What are you to do if somebody calls and says "I get bpdu from another client and his port turns off when your port is up"?

Hey guys,

I have a BGP peering with another provider and we connect with a private IP over an access port. Now, this guy provides us and others like us with a free streaming service. As far as I can tell, he's getting all service providers to peer with him and possibly turn it into an ix.

Regardless, he calls me the other day and says, if I turn your port on, another port gives bpdu received message and shuts down the port. I was told that I'm creating a loop OTA even though I have no direct peering with that other guy.

I listened, thought for a while and said I'll look into it. I did. There was nothing to look into.

Is there something to look into?

I thought it was like saying 8.8.8.8 went down when Uranus passed Urectum and somebody stuck gum under their table.