uClinux arp problem

There is an anomaly in the uClinux TCP stack involving two ports. To explain this assume that port A is using 142.42.6.114 with a MAC of 08:00:00:00:00:02 and port B is using 192.168.0.1 with a MAC of 08:00:00:00:00:01. If you are connected to port A and arp 142.42.6.114 it responds with 08:00:00:00:00:02 as the MAC. If you ARP for 192.168.0.1 it also responds with as the MAC 08:00:00:00:00:02 . The converse is true on port B. If both ports are connected to the same switch you will see a response from both ports. e.g. ARPing for 142.42.6.114 will get a response from the port B with 08:00:00:00:00:01 and the port A with 08:00:00:00:00:02.

We have tried this with both MMU and MMUless versions of uclinux. Also with a NIOS II configured with the altera TSE MAC and the OPENCORES 10/100 MAC.

Has anyone else seen this problem? If so, is there a fix?