Troubleshooting Common Issues

VMs Can't Reach Each Other

1. Verify all VMs on correct virtual network

2. Check firewall rules (disable temporarily for testing)

3. Verify IP addresses and subnet masks

4. Test with ping and tracert

Domain Join Fails

1. Verify DNS is pointing to DC

2. Ping DC by hostname: ping dc01.corp.local

3. Check time sync (Kerberos requires accurate time)

4. Verify domain credentials

Replication Not Working

# Force replication
repadmin /syncall /AdeP

# Check replication errors
repadmin /showrepl

# Monitor replication
dcdiag /v

Performance Issues

1. Reduce VM count (shut down unused VMs)

2. Reduce RAM allocation per VM

3. Use SSD for VM storage

4. Close unnecessary applications on host

5. Disable Windows indexing on VMs

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