Configuring Traffic Rates For Transmission; Configuring Fairness Weights - Cisco ONS 15454 SDH Configuration Manual

Configuring Traffic Rates for Transmission

Configuring Traffic Rates for Transmission
To enable and configure the traffic rates, perform the following procedure, beginning in global
configuration mode:
Command
Step 1
Router(config)# interface rpr-ieee 0
Step 2
Router(config-if)# rpr-ieee tx-traffic
rate-limit {reserved | high | medium} rate
[east | west]
Step 3
Router(config)# no shut
Step 4
Router(config)# end
Step 5
Router# copy running-config startup-config

Configuring Fairness Weights

RPR-IEEE has a configurable fairness system, used to control congestion on each ringlet. This feature
moderates bandwidth utilization of the ringlet to minimize and potentially eliminate starvation of any
station. Each station has two instances of the fairness machine, to control traffic that is being transmitted
and transited out of each span of the interface. Each fairness machine is devoted to a particular ringlet,
and controls the traffic that is destined to that ringlet.
Each ringlet in an unwrapped ring is independent, and the fairness configuration can differ for each
direction. The default is to configure both directions, but you can optionally specify east or west in the
configuration.
The local station weight impacts how congested the station appears relative to other stations in the
ringlet. It also affects how much more bandwidth a station can use. A higher weight gives the local
station a greater share of the ringlet bandwidth. A lower weight decreases the bandwidth share of the
local station. The default value is 0 configured as an exponent of 2, which yields an effective weight of 1.
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
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Chapter 26 Configuring IEEE 802.17b Resilient Packet Ring
Purpose
Activates interface configuration mode to
configure the RPR-IEEE interface.
Specifies a rate limit on a traffic queue. The
allowable rate depends on the speed of the
interface.
reserved—Reserves bandwidth for the highest
priority traffic, known as service class A0. The
default allocation is 0 Mbps.
high—Limits the rate of service class A1. The
default allocation is 10 Mbps.
medium—Limits the rate of service class B-CIR.
The default allocation is 10 Mbps.
(Optional) Specify the east or west ringlet.
Enables the RPR-IEEE interface and changes the
mode from the default passthrough.
Returns to privileged EXEC mode.
(Optional) Saves configuration changes to the
TCC2/TCC2P flash database.