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Dell SmartFabric OS10 User Guide Release 10.5.3

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Configuring source IP address for a leaked route

If the source IP is not mentioned explicitly for any self-originating packet (for example, ping or traceroute) to the leaked route destined through the parent VRF, the system chooses a source based on its source selection algorithm.
NOTE: For end-to-end traffic to flow, you must specify the source for self-originating packets and leak the same into the destination VRF.

To mitigate this issue and have control over the source IP address for leaked routes, you can create a loopback interface and associate it with the leaked VRF.

To explicitly mention the source interface for the leaked VRF:

Enter the following command:
update-source-ip
VRF CONFIGURATION Mode
After you configure the source IP address in a leaked VRF, if ping is initiated without -I option, then the source IP address will be that of the loopback interface.

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