HP 1910 User Manual

496
Figure 474 802.1Q tag header
Table 141 Description on 802.1p priority
802.1
p
p
riorit
y
(decimal) 802.1
p
p
riorit
y
(binar
y
) Descri
p
tion
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 5432107 5432106 6 7 5432107 54321066

HP 1910 Specifications

General

Model	HP 1910
Category	Switch
Port Type	10/100/1000BASE-T
Layer	Layer 2
PoE Support	No
MAC Address Table Size	8K entries
VLAN Support	Yes
Management	Web-based GUI
Switching Capacity	56 Gbps
Forwarding Rate	41.7 Mpps
Jumbo Frame Support	Yes
Ports	24