Netgear M4300-8X8F (XSM4316S) - Stackable Managed Switch with 16x10G including 8x10GBASE-T and 8xSFP+ Layer 3 Administrator's Guide

No incoming packet priority designation is trusted; therefore, the default priority value for 
the port is used.

All ingress packets from untrusted ports, where the packet is classified by an ACL or a 

DiffServ policy, are directed to specific CoS queues on the appropriate egress port. That 
specific CoS queue is determined by either the default priority of the port or a DiffServ or 

ACL-assigned queue attribute.

Used when trusted port mapping is unable to be honored - for instance, when a non-IP 
DSCP packet arrives at a port configured to trust IP DSCP.

CoS queue configuration involves port egress queue configuration and drop precedence 
configuration (per queue). The design of these on a per-queue, per-drop precedence basis 
allows you to create the service characteristics that you want for different types of traffic.

Port egress queue configuration:

Scheduler type, strict vs. weighted

Minimum guaranteed bandwidth

Maximum allowed bandwidth per-queue shaping

Queue management type, tail drop vs. WRED

Drop precedence configuration (per queue):

WRED parameters

Minimum threshold

Maximum threshold

Drop probability

Scale factor

Tail drop parameters, threshold

Per-interface basis:

Queue management type, rail Drop vs. WRED

Only if per-queue configuration is not supported

WRED decay exponent

Traffic shaping for an entire interface