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Figure 81 URPF work flow
1. URPF checks the source address validity and does the following:
• Discards packets with a broadcast source address.
• Discards packets with an all-zero source address but a non-broadcast destination address. (A
packet with source address 0.0.0.0 and destination address 255.255.255.255 might be a DHCP
or BOOTP packet, and it is not discarded.)
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