Network Switch discovery takes extremely long processing time on step 34.17 "Handle FDB for Cisco" when the switch has thousands of VlansIssue If discovering one Cisco Nexus switch can take several hours to complete, and in Pattern debug session it hangs on step 34.17 "Handle FDB for Cisco" till time out, please check how many VLANs it has discovered.If there are large number of VLANs (like thousands) discovered, and these VLANs are in the same VLAN group, then the attached Pattern changes may help resolve the issue Changes in the Pattern/library: Instead of executing command for every VLAN instance the pattern now executes to a VLAN group. This significantly reduces the commands execution time.Changes in steps - handle FDB for Cisco / handle bridge port for Cisco/ handle STP for CiscoChanges in library 'SNMP - Switch - Vlan'ResolutionApply attached update set and pattern xml files.Sync Pattern to MID server or restart MID serverTest Switch Discovery again and verify if discovery time reduces significantly.