Understanding Redundant Interconnect; Characteristics Of Ri On The Ml-Series Card; Figure 17-15 Rpr Ri - Cisco ONS 15454 SDH Configuration Manual

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Chapter 17 Configuring Cisco Proprietary Resilient Packet Ring

Understanding Redundant Interconnect

Ring interconnect (RI) is a mechanism to interconnect RPRs, both RPR-IEEE and Cisco proprietary

RPR, for protection from failure. It does this through redundant pairs of back-to-back Gigabit Ethernet

connections that bridge RPR networks. One connection is the active node and the other is the standby

node. During a failure of the active node, link, or card, the detection of the failure triggers a switchover

to the standby node.

Figure 17-15

RI on the ML-Series card has these characteristics:

Figure 17-15

Supported only on Gigabit Ethernet

Provisioned by identifying peer RPR MACs as either primary or standby

Uses an OAM frame to flush the spatially aware sublayer (SAS) table and MAC table at the add

Provides protection between individual RPRs, including:

Two Cisco proprietary RPRs

A Cisco proprietary ring and an IEEE 802.17 ring

Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0

illustrates an example of RPR RI.

Understanding Redundant Interconnect