Cisco GRS Configuration Manual page 111

External Logging
Netflow v9 Support
The collector device can use the combination of the sourceIPv4Address field plus the Source ID field to
associate an incoming NetFlow export packet with a unique instance of NetFlow on a particular device.
Templates for NAT44
The templates are defined and used for logging various NAT64 stateful, NAT44 and DS Lite events as follows.
The templates may change in future software releases. Hence it is advised that the Netflow collector software
is designed to understand the templates as distributed by the router and accordingly parse the records.
Options Templates
The translation entries consist of VRF IDs which might be incomprehensible to a user. To simplify this process,
the CGv6 applications send the options templates along with the data templates.
Options template is a special type of data record that indicates the format of option data related to the process
of NetFlow. The options data consist of the mapping between VRF Ids and VRF names. By parsing and using
this data, the NetFlow collectors can modify the translation entries by adding VRF names instead of VRF
IDs.
The value for the Template ID of options template is 1 where as the value of the Template ID for data template
is 0. For more information on Options template, see RFC3954.
Events
The events and the corresponding template details are described in the following table:
Cisco IOS XR Carrier Grade NAT Configuration Guide for the Cisco CRS Router, Release 5.2.x
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