In our company C6509, running s72033-ipservices_wan-mz-122-33.SXH4, i found some times it might send normal unicast
traffic as broadcast. like host A send unicast to host B and third host C on the same VLAN may receive this traffic.
and it's intermittent.
any help will be appreciated.
( I'll post topology in next reply )
Picture PC-1 pings PC-2.
When MAC address of PC-2 expires on 6509-B, but there's still a PC-2's entry in the ARP table of 6509-A.
6509-A (22.214.171.124) routes all ICMP packets from PC-1 to 6509-B (126.96.36.199), and the ICMP packets are broadcasted as there's no MAC entry of 188.8.131.52 in the mac-address-table of 6509-B.
---- Solution ----
A. Change mac aging-time same to ARP aging-time on both 6509.
B. Make mac unexpired on both 6509.
I choosed solution B and it worked.