Providing diagnostic metrics for virtual connections over physical connections into a provider network

A method, comprising:

• performing, by one or more computing devices:
• receiving a request to enable diagnostic metric collection for one or more diagnostic metrics for a particular virtual connection implemented over a dedicated physical connection between a client network and one or more resources implemented as part of the provider network;
• in response to receiving the request to enable diagnostic metric collection:
• sending, from at least one diagnostic agent located in the provider network, one or more diagnostic requests via the particular virtual connection to a client-side connection endpoint for the particular virtual connection;
• receiving, at the at least one diagnostic agent, one or more diagnostic responses to the one or more diagnostic requests via the particular virtual connection;
• and
• providing one or more diagnostic metrics for the particular virtual connection that are based, at least in part, on the one or more diagnostic responses.

A non-transitory, computer-readable storage medium, storing program instructions that when executed by one or more computing devices cause the one or more computing devices to implement:

• receiving a request to enable diagnostic metric collection for one or more diagnostic metrics for a particular virtual connection implemented over a dedicated physical connection between a client network and one or more resources implemented as part of the provider network;
• in response to receiving the request to enable diagnostic metric collection:
• sending, from at least one diagnostic agent located in the provider network, one or more diagnostic requests via the particular virtual connection to a client-side connection endpoint for the particular virtual connection;
• receiving, at the at least one diagnostic agent, one or more diagnostic responses to the one or more diagnostic requests via the particular virtual connection;
• and
• providing one or more diagnostic metrics for the particular virtual connection that are based, at least in part, on the one or more diagnostic responses.