Cisco Systems ONS 15310-CL manual QoS not Configured on Egress, ML-Series Egress Bandwidth Example

class-default

Chapter 12 Configuring Quality of Service on the ML-Series Card

QoS not Configured on Egress

QoS not Configured on Egress

The QoS bandwidth allocation of multicast and broadcast traffic is handled separately from unicast traffic. On each interface, the aggregate multicast and broadcast traffic are given a fixed bandwidth commit of 10% of the interface bandwidth. This is the optimum bandwidth that can be provided for traffic exceeding 10% of the interface bandwidth.

Figure 12-10 QoS not Configured on Egress

Traffic at Egress without QoS

Unicast Traffic?

True

False

Multicast/Broadcast

service up to 90% interface BW and best effort service for exceeding traffic

If rate < 10%		False	Best Effort
interface BW			Service	273826
	True

Guaranteed

Service

ML-Series Egress Bandwidth Example

This section explains with examples the utilization of bandwidth across different queues with or without Priority Multicast.

Case 1: QoS with Priority and Bandwidth Configured Without Priority Multicast

Strict Priority Queue is always serviced first. The remaining interface bandwidth is utilized to service other configured traffic.

In the following example, after servicing unicast customer_voice traffic, the remaining interface bandwidth is utilized for other WRR queues such as customer_core_traffic, customer_data, and

in the ratio of 1:3:5.

At any given time, the sum of the bandwidth assigned cannot exceed the interface bandwidth (in kbps). The bandwidth share allocated to class-defaultwill be utilized by default unicast traffic (in this example, unicast traffic with CoS values other than 2, 5, 7) and all multicast/broadcast traffic (all CoS values). The default unicast and all multicast/broadcast traffic will be serviced in the ratio of 9:1.

		Cisco ONS 15310-CL, ONS 15310-MA, and ONS 15310-MA SDH Ethernet Card Software Feature and Configuration Guide, R9.1 and R9.2
12-26	78-19415-01