Qos Not Configured On Egress; Ml-Series Egress Bandwidth Example; Case 1: Qos With Priority And Bandwidth Configured Without Priority Multicast; Figure 14-10 Qos Not Configured On Egress - Cisco ONS 15454 SDH Configuration Manual

Chapter 14 Configuring Quality of Service

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 14-10

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
class-default 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-default will 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.
QoS not Configured on Egress
Traffic at Egress
without QoS
False
Unicast Traffic?
True
service up to 90%
interface BW and
best effort service
for exceeding traffic
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
Multicast/Broadcast
False
If rate < 10%
interface BW
True
Guaranteed
Service
QoS not Configured on Egress
Best Effort
Service
14-27