Overlapping VNet resource groups in the Discovery and Visibility lists - Adaptive Applications - BlueCat Gateway - 25.3

Cloud Discovery & Visibility Administration Guide
ft:locale
en-US
Product name
BlueCat Gateway
Version
25.3

After CDV runs a discovery or visibility, the Discovery or Visibility tab (respectively) displays an entry with the status of the discovery or visibility. In some scenarios, two VNets can be created in two resource groups with the same name and CIDR. If two discoveries or visibilities are executed in consecutive order with the same Address Manager configuration name, and the discoveries or visibilities are discovering the VNets in those two resource groups, CDV flags the status of the discovery as "Completed (with issues)" (). This indicates that overlapping VNets have been dropped.



For more details about an overlapping discovery or visibility, click its status information. CDV will display a JSON file with information about the dropped VNets.

Note: On Azure infrastructures, overlapping VNet resource groups have the following additional behaviors.

  • Address Manager Blocks from overlapping VNets might still get imported into Address Manager.

  • Overlapping VNets are marked as Dropped. That VNet (and subsequently discovered subnets and associated CIDRs) will not be imported into Address Manager.

  • If a VNet is associated with an overlapping address space, that block won't be imported into Address Manager. The VNet's subnets and related devices are removed.

  • If overlapping address spaces are not associated with a VNet, CDV will try to import the VNet even if the VNet is currently Dropped. If the VNet (and its related subnets and devices) is successfully imported to Address Manager, the VNet will be marked as Added.

  • When you delete an overlapping VNet, and the VNet is currently Dropped, CDV will also attempt to remove any imported blocks.

  • If an overlapping Subnet is created (or a Subnet is associated with an overlapping IPv6 CIDR), CDV marks the VNet as Dropped and removes other related Subnets and devices, if any.

  • If an overlapping Subnet is deleted (or the Subnet is disassociated with an overlapping IPv6 CIDR), CDV will attempt to import the VNet back into Address Manager. If the VNet and its related subnets and devices are successfully imported, the VNet will be marked as Added.