Allied-telesis AT-S62 Manual de usuario Pagina 290

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 760
  • Tabla de contenidos
  • SOLUCIÓN DE PROBLEMAS
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 289
Chapter 17: Class of Service
Section II: Advanced Operations 290
Table 7 lists the mappings between the eight CoS priority levels and the
four egress queues of a switch port.
For example, if a tagged packet with a priority level of 3 entered a port
on the switch, the switch would store the packet in Q1 queue on the
egress port.
Priority 0 is mapped to CoS queue 1 instead of CoS queue 0 because
tagged traffic that has never been prioritised has a VLAN tag User
Priority of 0. If priority 0 was mapped to CoS queue 0, this default traffic
goes to the lowest queue, which is probably undesirable. This mapping
also makes it possible to give some traffic a lower priority than the
default traffic.
You can change these mappings. For example, you might decide that
packets with a priority of 5 need to be handled by egress queue Q3 and
packets with a priority of 2 should be handled in Q1. The result is shown
in Table 8..
Table 7 Default Mappings of IEEE 802.1p Priority Levels to Priority Queues
IEEE 802.1p Priority
Level
Port Priority Queue
0Q1
1Q0
2Q0
3Q1
4Q2
5Q2
6Q3
7Q3
Table 8 Customized Mappings of IEEE 802.1p Priority Levels to Priority
Queues
IEEE 802.1p Priority
Level
Port Priority Queue
0Q1
1Q0
2Q1
Vista de pagina 289
1 2 ... 285 286 287 288 289 290 291 292 293 294 295 ... 759 760

Comentarios a estos manuales

Sin comentarios