### Human: Can you tell about Alert - A1157 - RemoteSiteInvalidNetworkMapping. ### Assistant: Investigating RemoteSiteInvalidNetworkMapping issues on a Nutanix cluster.. This Nutanix article provides the information required for troubleshooting the alert RemoteSiteInvalidNetworkMapping for your Nutanix cluster.Alert Overview

The RemoteSiteInvalidNetworkMapping alert is generated if either the source or destination network configuration is not present in network mapping specified in the remote site, or the networks specified in the network mapping do not exist.Sample Alert

Block Serial Number: 16SMXXXXXXXX
Output Messaging

Check ID130063DescriptionInvalid Network Mapping Specified.Cause of failureEither the source or destination network configuration is not present in the network mapping specified on the remote site, or the networks specified in the network mapping do not exist.ResolutionsDelete existing network mappings and create the network mapping with the associated networks present on the source and the destination cluster for the remote site.ImpactWhen the VM is restored or cloned on the remote site, networking configuration may not be recovered.Alert IDA1157Alert TitleRemote Site Network Mapping Invalid.Alert MessageInvalid network mapping specified for remote site {remote_name}: {reason}.. Resolving the Issue

Create network mapping with the networks present on the source and the destination cluster for the remote site. Refer to Configuring Remote Site for more details.

Note: Unicode characters in the ESXi network name may generate a RemoteSiteInvalidNetworkMapping alert for CHDR workflows. This alert will be generated after upgrading the cluster to AOS version 5.20.1 and later from a cluster with AOS 5.20 or a previous version.

To resolve the alert, delete existing network mappings on the source and the destination cluster for the remote site reported in the alert and reconfigure the network mapping. Refer to Configuring a Remote Site (Physical Cluster) documentation. 

If you need assistance or if the above-mentioned steps do not resolve the issue, consider engaging Nutanix Support at https://portal.nutanix.com.

Collecting Additional InformationBefore collecting additional information, upgrade NCC. For information on upgrading NCC, refer KB 2871.Collect the NCC health check bundle via cli using the following command

nutanix@cvm$ ncc health_checks run_all

Collect the NCC output file ncc-output-latest.log. For information on collecting the output file, refer KB 2871.

Attaching Files to the CaseTo attach files to the case, follow KB 1294.If the size of the files being uploaded is greater than 5 GB, Nutanix recommends using the Nutanix FTP server due to supported size limitations.Requesting AssistanceIf you need assistance from Nutanix Support, add a comment to the case on the support portal asking for Nutanix Support to contact you. You can also contact the Support Team by calling on one of our Global Support Phone Numbers.Closing the CaseIf this KB resolves your issue and you want to close the case, click on the Thumbs Up icon next to the KB Number in the initial case email. This informs Nutanix Support to proceed with closing the case.. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.