Cisco Systems 15310-CL, 15310-MA Connecting the ML-Series Cards with Point-to-Point STS Circuits, Configuring CTC Circuits for RPR

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Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide R8.5

78-18133-01

Chapter 14 Configuring Resilient Packet Ring on the ML-Series Card

Configuring RPR

3. Configuring RPR Characteristics and the SPR Interface on the ML-Series Card, page 14-9

(Cisco IOS)

4. Assigning the ML-Series Card POS Ports to the SPR Interface, page 14-11 (Cisco IOS)

5. Creating the Bridge Group and Assigning the Ethernet and SPR Interfaces, page 14-13 (Cisco IOS)

6. Verifying Ethernet Connectivity Between RPR Ethernet Access Ports, page 14-15 (Cisco IOS)

7. CRC Threshold Configuration and Detection, page 14-15

Note Transaction Language One (TL1) can be used to provision the requi red SONET point-to-point circuits

instead of CTC.

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

You connect the ML-Series cards in an RPR through point-to-point STS circuits. These circuits use the

SONET network and are provisioned using CTC in the normal manner for provisioning optic al circuits.

Configuring CTC Circuits for RPR

These are the guidelines for configuring the CTC circuits required by 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

protection and should be unchecked. RPR normally 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 the 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 ci rcuits, 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 circuits do not support unrelated c ircuit creation options,

such as the following check box titles in CTC, unidirectional traffic, creating cross-connects only

(TL1-like), interdomain (unified control plane [UCP]), protected drops, subnetwork connection

protection (SCNP), or path protectionpath selectors.

• A best practice is to configure SONET 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 ring. Do not

configure Port 0 to Port 0 or Port 1 to Port 1. The east-to-west or west-to-east set up is also required

in order for the CTM network management software to recognize the ML-Seri es 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.

Figure 14-5 illustrates an example of a three-node RPR.