CoS on 10-Gigabit Ethernet LAN/WAN PIC with SFP+ Overview

The 10-Gigabit Ethernet LAN/WAN PIC with SFP+ supports intelligent handling of oversubscribed traffic in applications, such as data centers and dense-core uplinks. The 10-Gigabit Ethernet LAN/WAN PIC with SFP+ supports line-rate operation for five 10-Gigabit Ethernet ports from each port group or a total WAN bandwidth of 100 Gbps with Packet Forwarding Engine bandwidth of 50 Gbps.

Note:

This PIC has a front panel label with the designation “ETHERNET 10GBASE-SFP+ LAN-WAN” and can also be identified by its model number, PD-5-10XGE-SFPP. It is referred to hereafter as the 10-Gigabit Ethernet LAN/WAN PIC.

The 10-Gigabit Ethernet LAN/WAN PICs support behavior aggregate (BA) and fixed classification, weighted round-robin scheduling with two queue priorities (low and strict-high), committed and peak information rate shaping on a per-queue basis, and excess information rate configuration for allocation of excess bandwidth.

The 10-Gigabit Ethernet LAN/WAN PICs have the following features to support queuing:

• Committed and peak information rate shaping on a per-queue basis

• Excess information rate configuration for allocation of excess bandwidth

• Ingress queuing based on behavior aggregate (BA) classification

• Egress queuing at the Packet Forwarding Engine and at the PIC level

  The Packet Forwarding Engine egress queues are shared by two physical interfaces in a port group.

• Weighted round-robin (WRR) scheduling with two queue priorities (low and strict-high)

• Two special queues available in ingress, one per physical interface, called control queues

  Layer 2 and Layer 3 control protocol packets (OSPF, OSPF3, VRRP, IGMP, RSVP, PIM, BGP, BFD, LDP, IS-IS, RIP, RIPV6, LACP, ARP, IPv6 NDP, CFM, and LFM) are mapped to the control queue. In the control queue, these packets are not dropped even if there is oversubscription or congestion on a port group.

  Note:

  The control queue is rate-limited to 2 Mbps per physical interface. The packets in excess of 2 Mbps are dropped and accounted for.

To configure these features, include the corresponding class-of-service (CoS) statements at the [edit class-of-service] hierarchy level. The CoS statements supported on the 10-Gigabit Ethernet LAN/WAN PICs are shown in Table 1.

Table 1: CoS Statements Supported on the 10-Gigabit Ethernet LAN/WAN PICs

CoS Statements	Supported
buffer-size	No
drop-profile-map	No
excess-priority	No
excess-rate	Yes
priority	Yes
shaping-rate	Yes
transmit-rate	Yes