C
HAPTER
4
| Configuring the Switch
Quality of Service
– 190 –
QCE Configuration
◆ QCE Type - Specifies which frame field the Quality Control Entry (QCE)
processes to determine the QoS class of the frame. The supported
types are listed below:
■
Ethernet Type - This option can only be used to filter Ethernet II
formatted packets. (Range: 600-ffff hex; Default: ffff)
A detailed listing of Ethernet protocol types can be found in RFC
1060. A few of the more common types include 0800 (IP), 0806
(ARP), 8137 (IPX).
■
VLAN ID - VLAN ID. (Range: 1-4095; Default: 1)
■
TCP/UDP Port - Source/destination port number or range.
(Range: 0-65535; Default: 0-65535)
■
DSCP - IPv4/IPv6 DSCP priority level. (Range: 0-63; Default: 63)
■
ToS - Type of Service level, which processes the precedence part of
the IPv4/IPv6 ToS (3 bits) as an index to the eight QoS Class
values. (Range: Low, Normal, Medium, High; Default: Low)
■
Tag Priority - Uses the User Priority value (3 bits as defined by
IEEE 802.1p) as an index to the eight QoS Class values.
The default priority levels are assigned according to
recommendations in the IEEE 802.1p standard as shown in the
following table.
◆ Traffic Class - Output queue buffer. (Range: Low, Normal, Medium
and High, where High is the highest CoS priority queue)
WEB INTERFACE
To configure QoS Control Lists:
1. Click Configuration, QoS, Control Lists.
2. Click the button to add a new QCL, or use the other QCL
modification buttons to specify the editing action (i.e., edit, delete, or
moving the relative position of entry in the list).
3. When editing an entry on the QCE Configuration page, select the QCE
type, specify the relevant criteria to be matched for this type, and set
the traffic class to which traffic matching this criteria will be assigned.
4. Click Save.
Table 13: Mapping CoS Values to Egress Queues
Priority 0123 4 5 67
Queue Normal Low Low Normal Medium Medium High High
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