With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cssgNetworkGrpNetMask
cssg Network Group Net Mask
1.3.6.1.4.1.9.9.260.1.6.2.1.5
Indicate the mask to be ANDed with the destination address before being compared to the value in cssgNetworkGrpNetIpAddr.
Back to CISCO-SSG-MIB MIB page.
IPHost Network monitor allows you to monitor cssgNetworkGrpNetMask on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.
