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

Chapter 23 E-Series and G-Series Ethernet Operation

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
Column
Priority
Bridge max age
Bridge Hello Time
Bridge Forward Delay

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
Configuration
Point-to-point multicard EtherSwitch
Point-to-point single-card EtherSwitch
Point-to-point port-mapped mode
Shared packet ring multicard EtherSwitch
Common control card switch
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
Note
EtherSwitch or port-mapped mode. Multicard mode does not support STS-12c/VC4-4c Ethernet circuits.
(Table 23-5).
Spanning Tree Configuration
Default Value
32768
20 seconds
2 seconds
15 seconds
Protection for E-Series Circuit Configurations
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
Value Range
0–65535
6–40 seconds
1–10 seconds
4–30 seconds
Table 23-6 details the available protection.
Path Protection BLSR
(SNCP) (MS-SPRing)
None SONET/SDH
SONET/SDH SONET/SDH
SONET/SDH SONET/SDH
STP SONET/SDH
STP STP
E-Series Circuit Configurations
1 + 1
SONET/SDH
SONET/SDH
SONET/SDH
SONET/SDH
STP
23-23