Spa Architecture - Cisco ASR 1000 Series Software Configuration Manual

SPA Architecture

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SPA Architecture
This section provides an overview of the data path for the ATM SPAs, for use in troubleshooting and
monitoring. The following figure shows the data path for ATM traffic as it travels between the ATM optical
connectors on the front panel of the ATM SPA to the backplane connector that connects the SPA to the SIP.
Figure 5: ATM SPA Data Architecture
LFI processing is not supported on the Cisco ASR 1000 Series Aggregation Services Routers.
Note
Path of Cells in the Ingress Direction
The following steps describe the path of an ingress cell as it is received from the ATM network and converted
to a data packet before transmission through the SIP to the router's processors for switching, routing, or further
processing:
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS
XE Everest 16.5
54
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Overview of the ATM SPAs
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