With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciiPacketCountCSNPs
Cisco IS-IS Packet Count CSN Ps
1.3.6.1.4.1.9.10.118.1.5.3.1.7
The number of IS-IS CSNP frames seen in this direction at this level.
Back to CISCO-IETF-ISIS-MIB MIB page.
IPHost Network monitor allows you to monitor ciiPacketCountCSNPs on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.