Cisco Cisco ONS 15305 Multiservice Customer Access Platform データシート
Data Sheet
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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Eight Fast Ethernet with Eight Ethernet-over-SDH WAN Mapper Ports
In this mode of operation, each LAN port can be optionally connected to a WAN mapper port either
directly for a pure Layer 1 service, or through the Layer 2 switch for more advanced packet
processing. Eight of the 16 ports on the Layer 2 switch are connected to WAN mapper ports, while
the other 8 are available for connection to the LAN ports if a Layer 2 transport is desired. Similarly,
eight WAN mapper ports are connected to the Layer 2 switch, while the remaining eight are
available if pure Layer 1 transport is desired. Figure 2 shows a block diagram of the Ethernet traffic
flow in this mode of operation.
Figure 2. Ethernet Traffic Flow with Eight Fast Ethernet and Eight Ethernet-over-SDH WAN Mapper Ports.
Each LAN Port Can be Individually Configured for Layer 1 or Layer 2 Transport
Two Fast Ethernet with 14 Ethernet-over-SDH WAN Mapper Ports
In this mode of operation, the first 2 RJ-45 LAN ports are connected to 2 of the 16 10/100 Ethernet
ports in the Layer 2 switch, while the remaining 6 LAN ports are unused. The remaining 14 ports
on the switch are connected to Ethernet-over-SDH WAN mapper ports. This allows the module to
groom traffic from 14 different SDH virtual container groups (VCGs) proceeding from remotely
located devices. Traffic aggregated at the Layer 2 switch fabric can then be terminated in the same
module in one or both enabled LAN ports, or on a different module in the same chassis, such as a
Gigabit Ethernet module, that is connected through the Ethernet crossbar. Figure 3 shows the
Ethernet traffic flow when the module is configured in this mode of operation.
Figure 3. Ethernet Traffic Flow When Operating with Two LAN Ports and 14 WAN Mapper Ports