With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
vsanDenyUnknownWwn
vsan Deny Unknown Wwn
1.3.6.1.4.1.9.9.282.1.2.1
On a Fibre Channel fabric, an N_port is required to issue an Fabric Login (FLOGI) in order to login to the fabric. The FLOGI contains port's Port World Wide Name (WWN). By default, if this object is false and if a Port WWN is not present in the VSAN WWN database (if there is one), the static VSAN membership is used. If this object is 'true', then the FLOGI is denied if the Port WWN is not present in membership database. On other kinds of fabric, this object's value is undefined.
Back to CISCO-VSAN-MIB MIB page.
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