With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ceAssetEntry
Cisco Entity Asset Entry
1.3.6.1.4.1.9.9.92.1.1.1
An entAssetEntry entry describes the asset-tracking related data for an entity.
Back to CISCO-ENTITY-ASSET-MIB MIB page.
IPHost Network monitor allows you to monitor ceAssetEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.