ARP Table and entry ageing (time-out)

Hello everyone,

We are observing a strange behaviour in a net-net 4250 with SC6.2.0 MR-11 Patch 4 in our lab environment.

We are using an Exfo R14 SIP traffic generator and each time you load an scenario, mac and ip addresses may change or not depending on the needs. In this case the situation is the following:

SBC ARP table:

 1/0  301   192.168.070.018     00:A0:A9:00:00:32  1350399826  dynamic
 1/0  301   192.168.070.054     00:A0:A9:00:00:32  1351007046  dynamic

Exfo IP-MAC configuration for the scenario (two SIP end points in different physical ports):

EP1: 192.168.70.54: 00:A0:A9:00:00:32
EP2: 192.168.70.18: 00:A0:A9:00:00:31


In this situation communication between SBC and Exfo EP2 is impossible because SBC ARP table points to a wrong mac address for IP 192.168.70.18.