Specifications

9-14
Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 9 Ethernet Operation
E Series Circuit Configurations
5. STS 3c + STS 3c +STS 3c +STS 3c
6. STS 3c +STS 3c + 6 STS-1s
7. 12 STS-1s
Note When configuring scenario 3, the STS 6c must be provisioned before either of the STS 3c circuits.
9.3.3 ONS 15454 E Series and ONS 15327 EtherSwitch Circuit Combinations
The following table shows the Ethernet circuit combinations available in ONS 15454 E series cards and
ONS 15327s.
9.4 E Series Circuit Configurations
Ethernet circuits can link ONS nodes through point-to-point, 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. This section
includes procedures for creating these configurations and also explains how to create Ethernet manual
cross-connects. Ethernet manual cross-connects allow you to cross connect individual Ethernet circuits
to an STS channel on the ONS 15454 optical interface and also to bridge non-ONS SONET network
segments.
9.4.1 E-Series Circuit Protection
Different combinations of E-Series circuit configurations and SONET network topologies offer different
levels of E-Series circuit protection. Table 9-6 details the available protection.
Table 9-5 ONS 15454 and ONS 15327 Ethernet Circuit Combinations
15327
Single-Card 15327 Multicard
15454 E Series
Single-Card
15454 E Series
Multicard
six STS-1s three STS-1s one STS 12c six STS-1s
two STS 3cs one STS 3c two STS 6cs two STS 3cs
one STS 6c one STS 6c and
two STS 3cs
one STS 6c
one STS 12c one STS 6c and
six STS-1s
four STS 3cs
two STS 3cs and
six STS-1s
twelve STS-1s