Owner's Manual

370 | Chapter 15. QoS
NETGEAR 8800 User Manual
For CoS 802.1p traffic groups, the ingress 802.1p priority value selects a specific QoS profile
as shown in
Table 44. This mapping can be changed as described in Changing the 802.1p
Priority to QoS Profile Mapping on page 381. For traffic groups other than 802.1p-based
groups, the traffic group configuration selects a specific egress QoS profile by name.
The default dual-rate QoS configuration is 0% for minimum bandwidth and 100% for
maximum bandwidth.
A buffer parameter allows you to define the maximum amount of packet buffer memory to be
used by a QoS profile. By default, all QoS profiles can use 100% of the available packet
buffer memory. However, you can restrict buffer usage for a QoS profile in amounts ranging
from 1 to 100%, in whole integers. Regardless of the maximum buffer setting, the system
does not drop any packets if any packet buffer memory remains to hold the packet and the
current QoS profile buffer use is below the maximum setting.
Note: Using all eight queues on all ports can result in insufficient buffering
to sustain 0 packet loss throughput during full-mesh connectivity with
large packets.
Table 44. Default QoS Profile Parameters on the NETGEAR 8800 Series Switches
Ingress
802.1p
Priority
Value
Egress QoS
Profile
Name
a
a. The QoS profile name cannot be changed.
Queue Service
Priority Value
b
b. The queue service priority value cannot be changed.
Buffer Weight Notes
0-6 QP1 1 (Low) 100% 1 This QoS profile is part of the default
configuration and cannot be deleted.
QP2 2 (LowHi) 100% 1 You must create this QoS profile before
using it.
QP3 3 (Normal) 100% 1 You must create this QoS profile before
using it.
QP4 4 (NormalHi) 100% 1 You must create this QoS profile before
using it.
QP5 5 (Medium) 100% 1 You must create this QoS profile before
using it.
QP6 6 (MediumHi) 100% 1 You must create this QoS profile before
using it.
QP7 7 (High) 100% 1 You must create this QoS profile before
using it.
7 QP8 8 (HighHi) 100% 1 This QoS profile is part of the default
configuration and cannot be deleted.