Cisco ONS 15454 SDH - Configuring Qos on RPR-IEEE; Class a

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Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
Chapter 26 Configuring IEEE 802.17b Resilient Packet Ring
Configuring QoS on RPR-IEEE
Configuring QoS on RPR-IEEE
802.17 RPR defines 3 service classes, each with unique QOS characteristics.
1. Class A
2. Class B
3. Class C
With this different priorities of traffic can be configured with rate limiters and prescribed specific
bandwidths. This configuration on each span might be identical (default) or might vary from the other
span.
Class A
Class A is highest priority, lowest latency, and lowest jitter class . A has two types - A0 and A1. Can
reserve a portion of the ringlet bandwidth using "reserve" keyword. This bandwidth is known as A0
bandwidth. The A0 bandwidth can only be used for classA traffic. Any Reserved bandwidth that is
unused will remain unused on the ring, Reserved bandwidth is therefore expensive because it reduces
the bandwidth available for best effort. This reservation is propagated throughout the ringlet, and all RPR
Step 3
Router(config-if)# trigger crc-error action
{east | west | <cr>}
Specifies whether excessive CRC errors shut down
the span. The default is for excessive CRC errors
not to shut down the span.
(Optional) You can also specify the east or west
ringlet.
Caution The user must configure both spans to
shut down on receiving excessive CRC
errors. With the default behavior of both
spans not shutting down, network
problems can occur if the ML-Series
card receives signal degrade (SD) while
in passthrough mode.
Step 4
Router(config-if)# trigger crc-error delay
soak-minutes {east | west | <cr>}
(Optional) Sets the number of minutes that CRC
errors must exceed the threshold (soak) before an
action is taken. For
soak-minutes , the range is
from 3 minutes to 10 minutes. The default is 10
minutes.
(Optional) You can also specify the east or west
ringlet.
Step 5
Router(config)# no shut
Enables the RPR-IEEE interface and changes the
mode from the default passthrough.
Step 6
Router(config)# end
Returns to privileged EXEC mode.
Step 7
Router# copy running-config startup-config
(Optional) Saves configuration changes to the
TCC2/TCC2P flash database.
Command Purpose