How would one confirm that QoS is working over a MPLS VPN link between sites?
Here's the situation. We have two offices, let's call them Corp and Remote. At the Corp site sits a Phone System. The handsets connect to the Phone System over IP. Corp and Remote are connected by a MPLS VPN link. The MPLS VPN is managed by our service provider. When the link was established, I requested specific ports to be granted high priority when traveling bidirectionally between offices.
Users at the Remote site are now complaining about call quality issues. I suspect this is due to saturation on the link or that the QoS is no longer properly configured.
Are there tools available that will let me confirm QoS from one end to the other? I have a conceptual understanding of advanced networking, but am by no means an expert so a little detailed information may be required.
Thank you for your responses