Chapter 16 Quality of Service (QoS)
gets through faster while traffic in lower index queues is dropped if the network is congested.
Table 79 Internal Layer2 and Layer3 QoS Mapping
| LAYER 2 | LAYER 3 |
|
|
PRIORITY | IEEE 802.1P | TOS (IP |
| IP PACKET |
QUEUE | USER PRIORITY | DSCP | ||
| (ETHERNET | PRECEDENCE) | LENGTH (BYTE) | |
| PRIORITY) |
|
|
|
0 | 1 | 0 | 000000 |
|
|
|
|
|
|
1 | 2 |
|
|
|
|
|
|
|
|
2 | 0 | 0 | 000000 | >1100 |
|
|
|
|
|
3 | 3 | 1 | 001110 | 250~1100 |
|
|
| 001100 |
|
|
|
| 001010 |
|
|
|
| 001000 |
|
|
|
|
|
|
4 | 4 | 2 | 010110 |
|
|
|
| 010100 |
|
|
|
| 010010 |
|
|
|
| 010000 |
|
|
|
|
|
|
5 | 5 | 3 | 011110 | <250 |
|
|
| 011100 |
|
|
|
| 011010 |
|
|
|
| 011000 |
|
|
|
|
|
|
6 | 6 | 4 | 100110 |
|
|
|
| 100100 |
|
|
|
| 100010 |
|
|
|
| 100000 |
|
|
|
|
|
|
|
| 5 | 101110 |
|
|
|
| 101000 |
|
|
|
|
|
|
7 | 7 | 6 | 110000 |
|
|
|
|
|
|
|
| 7 | 111000 |
|
|
|
|
| |
|
|
|
|
|
268 |
| |
| ||
|
|
|