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Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
Chapter 23 E-Series and G-Series Ethernet Operation
Two-Port Bidirectional Transponder Mode
In transponder mode, the G-Series Ethernet traffic never comes into contact with the cross-connect card
or the SONET/SDH network, but stays internal to the G-Series card and is routed back to a GBIC on that
card (Figure 23-8).
Figure 23-8 G-Series Card in Transponder Mode (Two-Port Bidirectional)
A G-Series card can be configured either for transponder mode or as the SONET/SDH default. When
any port is provisioned in transponder mode, the card is in transponder mode and no SONET/SDH
circuits can be configured until every port on the card goes back to SONET/SDH mode. To provision
G-Series ports for transponder mode, refer to the Cisco ONS 15454 Procedure Guide or the
Cisco ONS 15454 SDH Procedure Guide.
All SONET/SDH circuits must be deleted before a G-Series card can be configured in transponder mode.
An ONS 15454 or ONS 15454 SDH can host the G-Series card configured in transponder mode in any
or all of the 12 traffic slots and supports a maximum of 24 bidirectional or 48 unidirectional lambdas.
A G-Series card configured as a transponder can be in one of three modes:
•
Two-port bidirectional transponder mode
•
One-port bidirectional transponder mode
•
Two-port unidirectional transponder mode
Two-Port Bidirectional Transponder Mode
Two-port bidirectional transponder mode maps the transmitted and received Ethernet frames of one
G-Series card port into the transmitted and received Ethernet frames of another port (Figure 23-8).
Transponder bidirectional port mapping can be done from any port to any other port on the same card.
90911
Gigabit Ethernet Ports
G-Series Card
Tx Port
Rx Port
ONS Node
Cross-Connect
Card
Optical Card
Tx Port
Rx Port
GBIC Standard SX, LX, ZX
GBIC CWDM or DWDM
Ethernet TDM
xWDM Lambda1
xWDM Lambda 2
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