With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rpMauType
Repeater Mau Type
1.3.6.1.2.1.26.1.1.1.4
standard IEEE 802.3 MAU types are defined above. If the MAU type is unknown, the object identifier unknownMauType OBJECT IDENTIFIER ::= { 0 0 } is returned. Note that unknownMauType is a syntactically valid object identifier, and any conformant implementation of ASN.1 and the BER must be able to generate and recognize this value.
Back to MAU-MIB MIB page.
IPHost Network monitor allows you to monitor rpMauType 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.