Cisco ONS 15454 SDH Specifications Page 360

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9-14
Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
Chapter 9 Ethernet Operation
E Series Circuit Configurations
Four scenarios exist for provisioning maximum single-card EtherSwitch bandwidth:
1. VC4-4c
2. VC4-2c + VC4-2c
3. VC4-2c + VC4 + VC4
4. VC4 + VC4 + VC4 + VC4
Note When configuring scenario 3, the VC4-2c must be provisioned before either of the VC4 circuits.
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 STM channel on the ONS 15454 optical interface and also to bridge non-ONS SDH network
segments.
Note When making a VC4-4c Ethernet circuit, Ethernet cards must be configured as Single-card EtherSwitch.
Multicard mode does not support VC4-4c Ethernet circuits.
9.4.1 E Series Point-to-Point Ethernet Circuits
The ONS 15454 SDH can set up a point-to-point (straight) Ethernet circuit as Single-card or Multicard.
Multicard EtherSwitch limits bandwidth to VC4-2c of bandwidth between two Ethernet circuit points,
but allows adding nodes and cards and making a shared packet ring. Single-card EtherSwitch allows a
full VC4-4c of bandwidth between two Ethernet circuit points.
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