Cisco 15327 User Manual
Page 41

1-3
Ethernet Card Software Feature and Configuration Guide, R7.2
Chapter 1 ML-Series Card Overview
ML-Series Feature List
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RPR-IEEE service qualities supported:
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Per-service-quality flow-control protocols regulate traffic introduced by clients.
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Class A allocated or guaranteed bandwidth has low circumference-independent jitter.
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Class B allocated or guaranteed bandwidth has bounded circumference-dependent jitter. This
class allows for transmissions of excess information rate (EIR) bandwidths (with class C
properties).
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Class C provides best-effort services.
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RPR-IEEE design strategies increase effective bandwidths beyond those of a broadcast ring:
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Clockwise and counterclockwise transmissions can be concurrent.
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Bandwidths can be reallocated on nonoverlapping segments.
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Bandwidth reclamation. Unused bandwidths can be reclaimed by opportunistic services.
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Spatial bandwidth reuse. Opportunistic bandwidths are reused on nonoverlapping segments.
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Temporal bandwidth reuse. Unused opportunistic bandwidth can be consumed by others.
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RPR-IEEE fairness features ensure proper partitioning of opportunistic traffic:
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Weighted fairness allows a weighted fair access to available ring capacity.
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Aggressive fairness is supported.
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Single Choke Fairness Supports generation, termination, and processing of Single Choke
Fairness frames on both spans.
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RPR-IEEE plug-and-play automatic topology discovery and advertisement of station capabilities
allow systems to become operational without manual intervention.
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RPR-IEEE multiple features support robust frame transmissions:
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Service restoration time is less than 60 milliseconds after a station or link failure.
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Queue and shaper specifications avoid frame loss in normal operation.
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Fully distributed control architecture eliminates single points of failure.
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Operations, administration, and maintenance support service provider environments.
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RPR-IEEE non-supported features:
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EoMPLS is not supported.
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IP forwarding is not supported.
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Wrapping, the optional IEEE 802.17b protection scheme, is not supported. Steering, the
protection scheme mandated by the standard, is supported.
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Layer 3 routing is not supported.