Chapter 9 Quality of Service (QoS)
VMG1312-B10C User’s Guide
146
The following table shows you the internal layer-2 and layer-3 QoS mapping on the Device. On the
Device, traffic assigned to higher priority queues gets through faster while traffic in lower index
queues is dropped if the network is congested.
Token Bucket
The token bucket algorithm uses tokens in a bucket to control when traffic can be transmitted. The
bucket stores tokens, each of which represents one byte. The algorithm allows bursts of up to
b
bytes which is also the bucket size, so the bucket can hold up to
b
tokens. Tokens are generated
and added into the bucket at a constant rate. The following shows how tokens work with packets:
• A packet can be transmitted if the number of tokens in the bucket is equal to or greater than the
size of the packet (in bytes).
• After a packet is transmitted, a number of tokens corresponding to the packet size is removed
from the bucket.
Table 52
Internal Layer2 and Layer3 QoS Mapping
PRIORITY
QUEUE
LAYER 2
LAYER 3
IEEE 802.1P USER
PRIORITY
(ETHERNET
PRIORITY)
TOS (IP
PRECEDENCE)
DSCP
IP PACKET
LENGTH (BYTE)
0
1
0
000000
1
2
2
0
0
000000
>1100
3
3
1
001110
001100
001010
001000
250~1100
4
4
2
010110
010100
010010
010000
5
5
3
011110
011100
011010
011000
<250
6
6
4
100110
100100
100010
100000
5
101110
101000
7
7
6
110000
111000
7
Содержание VMG1312-B10C
Страница 4: ...Contents Overview VMG1312 B10C User s Guide 4 Diagnostic 265 Troubleshooting 271 ...
Страница 14: ...Table of Contents VMG1312 B10C User s Guide 14 ...
Страница 15: ...15 PART I User s Guide ...
Страница 16: ...16 ...
Страница 22: ...Chapter 1 Introducing the Device VMG1312 B10C User s Guide 22 ...
Страница 33: ...33 PART II Technical Reference ...
Страница 34: ...34 ...
Страница 64: ...Chapter 5 Broadband VMG1312 B10C User s Guide 64 ...
Страница 100: ...Chapter 6 Wireless VMG1312 B10C User s Guide 100 ...
Страница 124: ...Chapter 7 Home Networking VMG1312 B10C User s Guide 124 ...
Страница 166: ...Chapter 10 Network Address Translation NAT VMG1312 B10C User s Guide 166 ...
Страница 176: ...Chapter 12 Interface Group VMG1312 B10C User s Guide 176 ...
Страница 192: ...Chapter 14 Firewall VMG1312 B10C User s Guide 192 ...
Страница 198: ...Chapter 16 Parental Control VMG1312 B10C User s Guide 198 ...
Страница 208: ...Chapter 18 Certificates VMG1312 B10C User s Guide 208 ...
Страница 211: ...Chapter 19 VPN VMG1312 B10C User s Guide 211 Figure 121 IPSec VPN Add ...
Страница 224: ...Chapter 20 Log VMG1312 B10C User s Guide 224 ...
Страница 234: ...Chapter 24 IGMP Status VMG1312 B10C User s Guide 234 ...
Страница 238: ...Chapter 25 xDSL Statistics VMG1312 B10C User s Guide 238 ...
Страница 242: ...Chapter 27 User Account VMG1312 B10C User s Guide 242 ...
Страница 248: ...Chapter 30 TR 064 VMG1312 B10C User s Guide 248 ...
Страница 252: ...Chapter 31 Time Settings VMG1312 B10C User s Guide 252 ...
Страница 264: ...Chapter 35 Configuration VMG1312 B10C User s Guide 264 ...
Страница 270: ...Chapter 36 Diagnostic VMG1312 B10C User s Guide 270 ...
Страница 288: ...Appendix B Legal Information VMG1312 B10C User s Guide 288 ...