QoS requirements for IP transport

Serial raw socket data that is transported using an IP transport service can be DSCP marked at the source node. This allows the source node (local host) of the traffic to mark packets correctly so that downstream nodes prioritize them as needed, and to queue local traffic in the right egress queue based on the classification assigned to the IP transport service.

The node does not support FC classification; instead, it marks the DSCP in packets based on the IP transport subservice DSCP setting. This DSCP setting overrides the DSCP marking that would have otherwise been based on the egress network queue policy FC. These packets are queued on egress with all other control traffic and are considered high priority.

Additionally, the DSCP setting is assigned per IP transport subservice for all traffic from the local host and all traffic destined for each remote host. There is no per remote host control for the DSCP setting.