With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cipIpOutNoRoutes
Cisco Channel Interface Processor Ip Out No Routes
1.3.6.1.4.1.9.9.32.1.1.1.1.13
The number of IP datagrams discarded because no route could be found to transmit them to their destination. Note that this counter includes any packets counted in ipForwDatagrams which meet this `no-route' criterion. Note that this includes any datagrams which a host cannot route because all of its default gateways are down.
Back to CISCO-CIPTCPIP-MIB MIB page.
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