With IPHost Network Monitor you can run simple snmp requests against a Netscreen device in your network.
nsPlyMonPackPerSec
NETSCREEN Ply Monitor Pack Per Sec
1.3.6.1.4.1.3224.10.2.1.3
Packets go through this policy per second
Back to NETSCREEN-POLICY-MIB MIB page.
IPHost Network monitor allows you to monitor nsPlyMonPackPerSec on Netscreen device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Netscreen VPN routers right now.