It could be due to 'Return to Sender' feature. With 'Return to Sender' feature enabled, PacketShaper could send packets using MAC and port based on the 'next hop address' it learned from the previous packets. And it is helpful when ARP is not working or no proper gateway address is configured in simple network. However, in some multipath networks, it could confuse the PacketShaper and may have incorrect 'Next hop address' for some management hosts.
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