With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
clagAggPortListEntry
Cisco Link Aggregation Agg Port List Entry
1.3.6.1.4.1.9.9.225.1.4.1.1
A list of the ports associated with a given Aggregator.
Back to CISCO-LAG-MIB MIB page.
IPHost Network monitor allows you to monitor clagAggPortListEntry 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.