C
HAPTER
4
| Configuring the Switch
Quality of Service
– 107 –
C
ONFIGURING
P
ORT
-
L
EVEL
Q
UEUE
S
ETTINGS
You can specify the default port priority for each port on the switch, a
Quality Control List (which sets the priority for ingress packets based on
detailed criteria), the default tag assigned to egress packets, the queuing
mode, and queue weights.
P
ARAMETERS
The following parameters are displayed on the Port QoS Configuration
page:
◆
Port
- Port identifier.
◆
Default Class
- The priority assigned to frames that do not match any
of the entries in the assigned Quality Control List (see
page 110
).
(Options: Low, Normal, Medium, High; Default: Low)
◆
QCL #
- A Quality Control List which classifies ingress frames based on
criteria including Ethernet type, VLAN ID, TCP/UDP port, DSCP, ToS, or
VLAN priority tag (see
page 110
). Traffic matching the first entry in the
QCL is assigned to the traffic class (output queue) defined by that
entry. Traffic not matching any of the QCEs are classified to the default
QoS Class for the port. (Range: 1-28)
◆
Tag Priority
- The default priority used when adding a tag to untagged
frames. (Range: 0-7; Default: 0)
The default tag priority applies to untagged frames received on a port
set to accept all frame types (i.e, receives both untagged and tagged
frames). This priority does not apply to IEEE 802.1Q VLAN tagged
frames. If the incoming frame is an IEEE 802.1Q VLAN tagged frame,
the IEEE 802.1p User Priority bits will be used.
Inbound frames that do not have VLAN tags are tagged with the input
port’s default ingress tag priority, and then placed in the appropriate
priority queue at the output port. (Note that if the output port is an
untagged member of the associated VLAN, these frames are stripped of
all VLAN tags prior to transmission.)
◆
Queuing Mode
- Sets the switch to service the queues based on a
strict rule that requires all traffic in a higher priority queues to be
processed before lower priority queues are serviced, or uses Weighted
Round-Robin (WRR) queuing that specifies a relative weight of each
queue. (Default: Strict)
◆
Queue Weight
- When the Queuing Mode is set to Weighted, the
switch uses the Weighted Round Robin (WRR) algorithm to determine
the frequency at which it services each priority queue. The traffic
classes are mapped to one of the egress queues provided for each port.
You can assign a weight to each of these queues, and thereby to the
corresponding traffic priorities. (Range: 1, 2, 4, 8; Default: Low - 1,
Normal - 2, Medium - 4, High - 8)
WRR uses a relative weighting for each queue which determines the
number of packets the switch transmits every time it services each
queue before moving on to the next queue. Thus, a queue weighted 8
Содержание 8028L2
Страница 1: ...MANAGEMENT GUIDE TigerSwitchTM 10 100 1000 28 Port Gigabit Ethernet Switch SMC8028L2 ...
Страница 6: ...ABOUT THIS GUIDE 6 ...
Страница 22: ...FIGURES 22 ...
Страница 26: ...SECTION Getting Started 26 ...
Страница 46: ...CHAPTER 2 Initial Switch Configuration Managing System Files 46 ...
Страница 48: ...SECTION Web Configuration 48 ...
Страница 133: ...CHAPTER 4 Configuring the Switch Simple Network Management Protocol 133 Figure 34 SNMP System Configuration ...
Страница 144: ...CHAPTER 4 Configuring the Switch Configuring DHCP Relay and Option 82 Information 144 ...
Страница 184: ...CHAPTER 6 Performing Basic Diagnostics Running Cable Diagnostics 184 ...
Страница 238: ...CHAPTER 12 Port Commands 238 ...
Страница 244: ...CHAPTER 13 Link Aggregation Commands 244 ...
Страница 262: ...CHAPTER 15 RSTP Commands 262 ...
Страница 272: ...CHAPTER 16 IEEE 802 1X Commands 272 ...
Страница 282: ...CHAPTER 17 IGMP Commands 282 ...
Страница 290: ...CHAPTER 18 LLDP Commands 290 ...
Страница 296: ...CHAPTER 19 MAC Commands 296 ...
Страница 306: ...CHAPTER 21 PVLAN Commands 306 ...
Страница 318: ...CHAPTER 22 QoS Commands 318 ...
Страница 352: ...CHAPTER 26 SNMP Commands 352 ...
Страница 355: ...CHAPTER 27 HTTPS Commands 355 EXAMPLE HTTPS redirect enable HTTPS ...
Страница 356: ...CHAPTER 27 HTTPS Commands 356 ...
Страница 362: ...CHAPTER 29 UPnP Commands 362 ...
Страница 370: ...CHAPTER 31 Firmware Commands 370 ...
Страница 372: ...SECTION Appendices 372 ...
Страница 386: ...GLOSSARY 386 ...
Страница 390: ...INDEX 390 W web interface access requirements 49 configuration buttons 50 home page 50 menu list 51 panel display 51 ...
Страница 391: ...INDEX 391 ...
Страница 392: ...149100000079A R01 SMC8028L2 ...