Edge Node Expansion fails with error: Failed to validate Edge node status - Could not parse [####:###:####::/48]

Products

• VMware SDDC Manager

Issue/Introduction

• Edge Node expansion workflow fails with the error below:

   

  Description	Check feasibility of specified edge cluster expansion
  Progress Messages	Failed to validate Edge node status
  Error	Message: Failed to validate Edge node status Remediation Message: Reference Token: ###### Cause: Could not parse [###:###:####::/48]

   

• Logs shows the following error related to the discovery of an IPv6 transit subnet CIDR:
  
  /var/log/vmware/vcf/domainmanager/domainmanager.log
yyyy-mm-ddThh:mm:ss.zzz+0000 INFO  [vcf_dm,<task_id>,b676] [c.v.v.n.h.NsxtEdgeClusterValidationUtil,dm-exec-19]  Transit subnets : [###.###.###.###/16, ####:####:####::/48], Internal transit subnets : [###.###.###.###/24]
yyyy-mm-ddThh:mm:ss.zzz+0000 ERROR [vcf_dm,<task_id>,b676] [c.v.v.n.c.v.v.NsxTEdgeClusterValidator,dm-exec-19]  Exception during cluster resources check for expanding edge cluster 
java.lang.IllegalArgumentException: Could not parse [####:####:####::/48]    # <=== IPv6 CIDR
          at org.apache.commons.net.util.SubnetUtils.<init>(SubnetUtils.java:290)
        at com.vmware.vcf.nsxtedgeclustermanager.helper.NsxtEdgeClusterValidationUtil.checkT0SubnetsOverlap(NsxtEdgeClusterValidationUtil.java:3797)
        at com.vmware.vcf.nsxtedgeclustermanager.helper.NsxtEdgeClusterValidationUtil.validateIpAddressOverlapsWithNsxtResources(NsxtEdgeClusterValidationUtil.java:3836)   
        at com.vmware.vcf.nsxtedgeclustermanager.helper.NsxtEdgeClusterValidationUtil.validateAsyncEdgeExpansionSpecWithNsxtResouce(NsxtEdgeClusterValidationUtil.java:1102)
        at com.vmware.vcf.nsxtedgeclustermanager.controller.v1.validation.NsxTEdgeClusterValidator.validateAsyncEdgeExpansionSpec(NsxTEdgeClusterValidator.java:1375)       
        at com.vmware.vcf.nsxtedgeclustermanager.controller.v1.NsxTEdgeClusterController.lambda$triggerExpansionValidationAsync$4(NsxTEdgeClusterController.java:554)    

Environment

VMware SDDC Manager 5.x

Cause

IPv6 is not supported by this version of SDDC Manager.

Resolution

Remove the unsupported IPv6 configuration from NSX.

Note: If you cannot change the existing NSX configuration open a case with Broadcom Support.