Cisco ONS 15454 SDH - E-Series Spanning Tree Configuration; E-Series Circuit Configurations; E-Series Circuit Protection

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Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
Chapter 23 E-Series and G-Series Ethernet Operation
E-Series Circuit Configurations
E-Series Spanning Tree Configuration
To view the spanning tree configuration, at the node view click the Provisioning > Etherbridge >
Spanning Trees tabs (Table 23-5).
E-Series Circuit Configurations
E-Series Ethernet circuits can link ONS nodes through point-to-point (straight), shared packet ring, or
hub-and-spoke configurations. Two nodes usually connect with a point-to-point configuration. More
than two nodes usually connect with a shared packet ring configuration or a hub-and-spoke
configuration. Ethernet manual cross-connects allow you to cross connect individual Ethernet circuits to
an STS/VC channel on the ONS node optical interface and also to bridge non-ONS SONET/SDH
network segments. To configure E-Series circuits, refer to the Cisco ONS 15454 Procedure Guide or the
Cisco ONS 15454 SDH Procedure Guide.
E-Series Circuit Protection
Different combinations of E-Series circuit configurations and SONET/SDH network topologies offer
different levels of E-Series circuit protection. Table 23-6 details the available protection.
Note Before making Ethernet connections, choose an STS/STM circuit size.
Note To make an STS-12c/VC4-4c Ethernet circuit, Ethernet cards must be configured in single-card
EtherSwitch or port-mapped mode. Multicard mode does not support STS-12c/VC4-4c Ethernet circuits.
Table 23-5 Spanning Tree Configuration
Column Default Value Value Range
Priority 32768 0–65535
Bridge max age 20 seconds 6–40 seconds
Bridge Hello Time 2 seconds 1–10 seconds
Bridge Forward Delay 15 seconds 4–30 seconds
Table 23-6 Protection for E-Series Circuit Configurations
Configuration
Path Protection
(SNCP)
BLSR
(MS-SPRing) 1 + 1
Point-to-point multicard EtherSwitch None SONET/SDH SONET/SDH
Point-to-point single-card EtherSwitch SONET/SDH SONET/SDH SONET/SDH
Point-to-point port-mapped mode SONET/SDH SONET/SDH SONET/SDH
Shared packet ring multicard EtherSwitch STP SONET/SDH SONET/SDH
Common control card switch STP STP STP