403
Figure 440 802.1Q tag header
Table 143 Description on 802.1p priority
802.1p priority (decimal)
802.1p priority (binary)
Description
0 000
best-effort
1 001
background
2 010
spare
3 011
excellent-effort
4 100
controlled-load
5 101
video
6 110
voice
7 111
network-management
Queue scheduling
In general, congestion management uses queuing technology. The system uses a certain queuing
algorithm for traffic classification, and then uses a certain precedence algorithm to send the traffic.
Each queuing algorithm handles a particular network traffic problem and has significant impacts on
bandwidth resource assignment, delay, and jitter.
In this section, two common hardware queue scheduling algorithms Strict Priority (SP) queuing and
Weighted Round Robin (WRR) queuing are introduced.
SP queuing
SP queuing is designed for mission-critical applications, which require preferential service to reduce
response delay when congestion occurs.
1 0 0 0 0 0 0 1 0 0 0 0 0 0 0
Priority
VLAN ID
TPID (Tag protocol identifier)
TCI (Tag control information)
Byte 1
Byte 2
0
Byte 3
Byte 4
CFI
7
5 4 3 2 1 0 7
5 4 3 2 1 0
6
6
7
5 4 3 2 1 0 7
5 4 3 2 1 0
6
6
Содержание FlexNetwork NJ5000
Страница 12: ...x Index 440 ...
Страница 39: ...27 Figure 16 Configuration complete ...
Страница 67: ...55 Figure 47 Displaying the speed settings of ports ...
Страница 78: ...66 Figure 59 Loopback test result ...
Страница 158: ...146 Figure 156 Creating a static MAC address entry ...
Страница 183: ...171 Figure 171 Configuring MSTP globally on Switch D ...
Страница 243: ...231 Figure 237 IPv6 active route table ...
Страница 293: ...281 Figure 298 Ping operation summary ...