Scheduling and Shaping on 10-Gigabit Ethernet LAN/WAN PICs Overview
The 10-Gigabit Ethernet LAN/WAN PIC has ten 10-Gigabit Ethernet ports providing 100 Gbps of WAN bandwidth and 50 Gbps of Packet Forwarding Engine bandwidth. On the ingress side of the 10-Gigabit Ethernet LAN/WAN PIC, two consecutive physical interfaces on the PICs are grouped together into a port group and are serviced by a single scheduler. The port groups are as shown in Table 1:
Table 1: Port Groups on 10-Gigabit Ethernet LAN/WAN PICs
Port Group | Mapped Ports |
|---|---|
Group 1 | xe-fpc/pic/0 xe-fpc/pic/1 |
Group 2 | xe-fpc/pic/2 xe-fpc/pic/3 |
Group 3 | xe-fpc/pic/4 xe-fpc/pic/5 |
Group 4 | xe-fpc/pic/6 xe-fpc/pic/7 |
Group 5 | xe-fpc/pic/8 xe-fpc/pic/9 |
The two physical interfaces in a port group share 10 Gbps bandwidth towards the Packet Forwarding Engine. A scheduler has eight class-of-service (CoS) queues and two control queues. On the ingress side of the 10-Gigabit Ethernet LAN/WAN PIC, the eight CoS queues are split four plus four for the two physical interfaces. Thus, the 10-Gigabit Ethernet LAN/WAN PIC supports four ingress queues and eight egress queues per physical interface.
At the ingress side of the 10-Gigabit Ethernet LAN/WAN PIC, multiple forwarding classes can be mapped to one queue using the restricted-queue configuration. When creating a scheduler-map for the ingress queues, only one forwarding class should be chosen from the multiple forwarding classes that map to the same queue. Then, the scheduler-map can be specified using the set class-of-service scheduler-maps map-name forwarding-class class-name scheduler scheduler command.
The 10-Gigabit Ethernet LAN/WAN PICs manage packet buffering internally and no configuration is required.
 | Note: The delay-bandwidth buffering configuration is not supported on the 10-Gigabit Ethernet LAN/WAN PICs. |
