Cisco Systems 15327 Connecting the ML-Series Cards with Point-to-Point STS/STM Circuits, Configuring CTC Circuits for Cisco Proprietary RPR

17-8

Ethernet Card Software Feature and Configuration Guide, R7.2

January 2009

Chapter 17 Configuring Cisco Proprietary Resilient Packet Ring

Connecting the ML-Series Cards with Point-to-Point STS/STM Circuits

Note Transaction Language One (TL1) can be used to provision the required SONET/SDH point-to-point

circuits instead of CTC.

Connecting the ML-Series Cards with Point-to-Point STS/STM Circuits

You connect the ML-Series cards through point-to-point STS/STM circuits. These circuits use the

ONS 15454 SONET/SDH network and are provisioned using CTC in the normal manner for

provisioning optical circuits.

Configuring CTC Circuits for Cisco Proprietary RPR

These are the guidelines for configuring the CTC circuits required by Cisco proprietary RPR:

• Leave all CTC Circuit Creation Wizard options at their default settings, except Fully Protected

Path in the Circuit Routing Preferences dialog box. Fully Protected Path provides SONET/SDH

protection and should be unchecked. Cisco proprietary RPR no rmally provides the Layer 2

protection for SPR circuits.

• Check Using Required Nodes and Spans to route automatically in the Circuit Routing Preferences

dialog box. If the source and destination nodes are adjacent on t he ring, exclude all nodes except the

source and destination in the Circuit Routing Preferences dialog box. This forces the circuit to be

routed directly between source and destination and preserves STS/STM circuits, which would be

consumed if the circuit routed through other nodes in the ring. If there is a node or node s that do not

contain an ML-Series card between the two nodes containing ML-Series cards, include this node or

nodes in the included nodes area in the Circuit Routing Preference dialog box, a long with the source

and destination nodes.

• Keep in mind that ML-Series card STS/STM circuits do not support unrelate d circuit creation

options.

• A best practice is to configure SONET/SDH circuits in an east-to-west or west-to-east configuration,

from Port 0 (east) to Port 1 (west) or Port 1 (east) to Port 0 (west), around the SONET/SDH ring.

Do not configure Port 0 to Port 0 or Port 1 to Port 1. The east-to-west or west-to-east setup is also

required in order for the CTM network management software to recognize the ML-Series

configuration as an SPR.

Detailed CTC circuit procedures are available in the “Create Circuits and VT Tunnels” chapter of the

Cisco ONS 15454 Procedure Guide and the “Create Circuits and Tunnels” chapter of the

Cisco ONS 15454 SDH Procedure Guide.

Figure 17-5 illustrates an example of a three-node Cisco proprietary RPR.