Forescout FSCP Exam - Topic 11 Question 9 Discussion

According to theForescout Switch Plugin Configuration Guide Version 8.12 and 8.14.2, when troubleshooting a failed change VLAN action, you should verify:'The Switch Model is compatible for the change VLAN action, The managing appliance IP is allowed write VLAN changes to the switch, The network infrastructure allows CounterACT SSH and SNMP Set traffic to reach the switch, The action is enabled in the policy'.

Troubleshooting Switch VLAN Changes:

According to the Switch Plugin documentation:

When a VLAN assignment fails, verify:

Switch Model Compatibility

Not all switch models support VLAN changes via SNMP/SSH

Consult Forescout compatibility matrix

Refer to Appendix 1 of Switch Plugin guide for capability summary

Managing Appliance Permissions

The managing appliance must havewrite accessto VLAN settings

Requires appropriate SNMP community strings or SNMPv3 credentials

Must be allowed to execute SNMP Set commands

Network Infrastructure

SSH accessto the switch (CLI) - typically port 22

SNMP Settraffic to the switch - port 161

NOT 'SNMP Get' (read-only) or 'SNMP Trap' (notifications)

SNMP Set is specifically for write operations like VLAN assignment

Policy Action Status

The action must beenabledin the policy

If the action is disabled, it won't execute regardless of other settings

Why Option C is Correct:

According to the documentation:

Switch Model(not Vendor) - Model-specific capabilities matter

Managing appliance(not Enterprise Manager) - For distributed deployments

SNMP Set(not Get or Trap) - Required for write/change operations

Action enabled(not disabled) - Prerequisite for execution

Why Other Options Are Incorrect:

A- Mixes incorrect items: 'action is disabled' is wrong; 'SNMP Trap' is for notifications, not VLAN changes

B- States 'SNMP Get' (read-only) instead of 'SNMP Set' (write); has 'action is disabled'

D- Says 'all actions' instead of 'change VLAN action'; uses 'SNMP Set' correctly but other details wrong

Referenced Documentation:

Forescout CounterACT Switch Plugin Configuration Guide v8.12

Switch Plugin Configuration Guide v8.14.2

Switch Configuration Parameters

Switch Restrict Actions