Cisco Cisco ONS 15305 Multiservice Customer Access Platform Hoja De Datos
Cisco Systems, Inc.
All contents are Copyright © 1992–2004 Cisco Systems, Inc. All rights reserved. Important Notices and Privacy Statement.
Page 2 of 8
Two Gigabit Ethernet Ports Without Mapper Circuits
In this mode of operation, the two physical input ports are connected directly to the Layer 2 switch fabric and to the centralized Ethernet
crossbar for connectivity to other Ethernet modules in the Cisco ONS 15305 system. In this configuration, none of the WAN mapper circuits
are available for access to the SDH network (Figure 2).
Figure 2
Ethernet Traffic Flow when Operating Without Mapper Circuits
Two Gigabit Ethernet Ports with Mapper Circuits
In this mode of operation, one physical LAN port will not have access to the Layer 2 switch fabric and instead will be connected directly to an
internal WAN mapper port for pure Layer 1 transport over the SDH network. The other physical port can be configured to either connect to a
WAN mapper port directly for pure Layer 1 transport (Figure 3), or through the Layer 2 switch fabric for access to the Ethernet crossbar or to
take advantage of the module’s Layer 2 features (Figure 4).
Figure 3
Ethernet Traffic Flow with Both Ports Directly Connected to the WAN Mapper Ports for Pure Layer 1 Transport