With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
l2tAuthFailWindowSize
l2t Authentication Fail Window Size
1.3.6.1.4.1.2.6.119.4.7.1.1.10
The window size of the L2T Tunnel Authentication Failure Table (l2tAuthFailTunnelTable) and the L2T User Authentication Failure Table (l2tAuthFailUserTable). When retrieved by an SNMP GET or GET-NEXT request, this number specifies the maximum number of entries which will be maintained in each of these tables. When modified by an SNMP SET request, the device will set the value of this object as close as possible to the requested value based on implementation and available resources.
Back to ibm-ibml2tp MIB page.
IPHost Network monitor allows you to monitor l2tAuthFailWindowSize on IBM device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring IBM switches right now.