With IPHost Network Monitor you can run simple snmp requests against a Netscreen device in your network.
nsIfMonSaInactive
NETSCREEN If Monitor Sa Inactive
1.3.6.1.4.1.3224.9.4.1.11
packet drop due to sa not active
Back to NETSCREEN-INTERFACE-MIB MIB page.
IPHost Network monitor allows you to monitor nsIfMonSaInactive on Netscreen device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Netscreen firewalls right now.