Nortel Networks OPTera Metro 3500 - Manual (Page 101)

Operation, administration, and maintenance (OAM) features 2-63
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
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
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
Packet Edge circuit packs
Optical interface
circuit pack
Optical interface
circuit pack
Resilient Packet
Ring