WAN QoS

In a large network, you must enable end-to-end QoS, so that the traffic prioritized at the access point does not lose its priority as it passes through other devices such as distribution switches, core routers, other devices, and so on.

Some devices, such as core routers, may provide enough bandwidth and the traffic prioritization is unnecessary. However, you should enable QoS on any network.

Vocera marks the ToS (Type of Service) header in its packets to support routers that use this technology to classify and prioritize traffic. Vocera sets the ToS byte in the following ways:

• DSCP (DiffServ Code Point) marking of EF (Expedited Forwarding).

• IP Precedence marking of 5.

If your Vocera traffic traverses a WAN circuit, you must ensure that the following QoS requirements are met:

• Enable QoS at all WAN ingress and egress points.

• Ensure that the routers that provide WAN circuits has the highest priority set to traffic with a DSCP marking of EF or an IP Precedence of 5.