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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, ISIS, 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

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