After discovery is configured and run, the Discovery page displays an entry with the
status of the Schedule manager and its discovery jobs. On Amazon Web Services (AWS)
infrastructures, In some scenarios, two VPCs can be created in two regions with the same
name and CIDR. If two discoveries are executed in consecutive order with the same
Address Manager configuration name, and the discoveries are discovering the VPCs in
those two regions, Cloud Discovery & Visibility (CDV) flags the statuses of the
discovery jobs as "Completed (with issues)" (
).
These jobs indicate that overlapping VPCs have been dropped:
For more details about an overlapping discovery job, click the job. CDV will display details about the job in a slide-out panel. Overlapping networks that could not be imported into Address Manager for a discovery job are called "dropped" resources and are displayed in the Dropped Resource section in the slide-out panel for that discovery job.
On AWS infrastructures, overlapping VPCs have the following additional behaviors.
Address Manager Blocks from overlapping VPCs might still get imported into Address Manager.
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Overlapping VPCs are marked as Dropped. That VPC (and subsequently discovered subnets and associated CIDRs) will not be imported into Address Manager.
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If a VPC is associated with an overlapping CIDR, that block won't be imported into Address Manager. The VPC's subnets and related devices are removed.
- If an overlapping CIDR is removed from a VPC, CDV will attempt to import the VPC, even if it is currently marked as Dropped. If the VPC (along with its related subnets and devices) is successfully imported into Address Manager, the VPC will be marked as Added.
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When you delete an overlapping VPC, and the VPC is currently Dropped, CDV will also attempt to remove any imported blocks.
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If an overlapping Subnet is created (or a Subnet is associated with an overlapping IPv6 CIDR), CDV marks the VPC as Dropped and removes other related Subnets and devices, if any.
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If an overlapping Subnet is deleted (or the Subnet is disassociated with an overlapping IPv6 CIDR), CDV will attempt to import the VPC back into Address Manager. If the VPC and its related subnets and devices are successfully imported, the VPC will be marked as Added.