HPE FlexNetwork 5510 HI Series Security Configuration Manual page 453

If yes, uRPF proceeds to step 3.
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If no, uRPF proceeds to step 6.
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3. uRPF checks whether the check mode is loose:
If yes, uRPF proceeds to step 8.
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If no, uRPF checks whether the matching route is a direct route:
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− If yes, uRPF proceeds to step 5.
− If no, uRPF proceeds to step 4.
4. uRPF checks whether the receiving interface matches the output interface of the matching FIB
entry:
If yes, uRPF proceeds to step 8.
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If no, uRPF proceeds to step 9.
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5. uRPF checks whether the source IP address matches an ARP entry:
If yes, uRPF proceeds to step 8.
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If no, uRPF proceeds to step 9.
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6. uRPF checks whether the FIB table has a default route:
If yes, uRPF proceeds to step 7.

If no, uRPF proceeds to step 9.

7. uRPF checks whether the check mode is loose:
If yes, uRPF proceeds to step 8.

If no, uRPF checks whether the output interface of the default route matches the receiving

interface of the packet:
− If yes, uRPF proceeds to step 8.
− If no, uRPF proceeds to step 9.
8. The packet passes the check and is forwarded.
9. The packet is discarded.
NOTE:
uRPF does not check multicast packets.
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