I am wondering if possible to do QOS (or similar action) inside vpn tunnel to a cloud server. the goal is to reserved bandwith for voip traffic.
I read that you can with GRE and other people said, you cannot have qos over the internet. Your ISP do not honor qos (only with mpls or contract).
So, if I build a vpn tunnel to another remote site, is there way to manage the qos on the local network and thru the vpn tunnel for voip traffic.
ah yes, btw I do not have access to the cisco ASA 5506 on the customer's network.
I think I am stuck. I plan to build a vpn tunnel (for dev) with a raspberrypi.
thank you all,
Best Answer
Possible? Generally, yes. However, you need to consider the tunnel outside as well. How effective QoS works depends on a large number of parameters only some of which you have control over.
QoS inside a tunnel makes only sense when the tunnel traffic can't be congested from the outside - you'll need to reserve bandwidth for the tunnel itself as well. The downside is that you can't differentiate between high-priority traffic and low-priority traffic from the outside. You might want to consider running a separate tunnel for each priority.
Of course, all this is limited by the service quality between tunnel endpoints - effectively, you can only handle congestion based on a nominal or minimum bandwidth you've got between the endpoints. Additionally limited bandwidth during high-traffic times at your ISP can't be handled without their cooperation.