Nortel Networks 3500 manual Resilient packet ring RPR object, Resilient packet ring shelf level

Operation, administration, and maintenance (OAM) features 2-63

Resilient packet ring (RPR) object

A resilient packet ring (RPR) object is a SONET bandwidth pipe. See Figure 2-33 on page 2-63. The graphic shows a RPR object at the shelf level. Bandwidth is allocated to the ring object from each of the optical circuit packs. In this example, Packet Edge circuit packs are attached to the RPR object and share its bandwidth.

The maximum number of nodes provisionable on a RPR ring is:

•16 for RPR ring consisting only of 2xGigE

•12 for RPR rings consisting of a mix of 2xGigE with 4x100FX and/or 4x100BT cards.

If the maximum number of nodes on the ring is exceeded a “Max OPE Nodes On Ring Exceed” alarm is raised. For more information on this new alarm, see RPR configuration alert on page 2-65.

Figure 2-33

Resilient packet ring (shelf level)

		IW0026
Optical interface	Resilient Packet	Optical interface
circuit pack	Ring	circuit pack
	Packet Edge circuit packs

The OPTera Packet Edge System provides the following features:

•optimized use of transport network bandwidth

•reduced port costs

•lower network operation cost

•easy network management

•the ability to support a mix of packet and non-RPR traffic over the same network

•high-speed connectivity with low delay

Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004