Impact on Server:

• High CPU/RAM usage-due to virtual switching overhead.
• Network congestion-if the physical NIC is oversubscribed by multiple VMs.
• Increased latency-if the hypervisor is processing all VM traffic.

Solutions

• DPDK → Optimizes packet processing, improving throughput.
• Upgrading to 25G/100G NICs → Increases bandwidth capacity.
• SR-IOV → Offloads networking to the NIC, reducing CPU load.

 Result: Server handles VM traffic more efficiently with lower CPU overhead.

Impact on Server:

• Hypervisor vulnerabilities-could allow VM breakout attacks.
• Compromised VMs-might attack the host or other VMs.
• Increased logging/monitoring load-for security tools.

Solution:

• Micro-segmentation (NSX/ACI) → Reduces attack surface by isolating VMs.
• Hypervisor hardening → Patches vulnerabilities, disables risky services.
• Encrypted VM migration → Protects data in transit.

Result: Server remains more secure, but may see slight overhead from encryption and policy enforcement.

Impact on Server:

CAUSE

• VMs may lose network access if IP assignment fails (DHCP issues, IP conflicts, or exhausted IP pool).

• Duplicate IP assignments can cause packet loss, intermittent connectivity, or complete network failure for affected VMs.

 Solutions

Check DHCP Server (If Used)

• Verify DHCP scope availability ( dhcpd.leases in Linux / DHCP console in Windows).
• Ensure the DHCP server is running:
• Expand the IP pool if exhausted

 Detect & Resolve IP Conflicts

• Use arp-scan (Linux) or arp –a   (Windows) to detect duplicate IPs. 
• Manually release conflicting IPs    

Result: Server networking remains stable with fewer manual interventions.

Impact on Server:

• Complete network loss for VMs on the vSwitch.
• Packet loss or latency spikes.

Solutions

• • Verify vSwitch config (ESXi: esxcfg-vswitch -l).
  • Reboot hypervisor host if needed.

Impact on Server:

• Security Breach Risk: Untrusted VMs communicating with production workloads.
• Compliance Violations: Regulatory failures (e.g., PCI-DSS, HIPAA).
• Service Disruption: Malicious traffic affecting critical workloads.

solutions

Isolate Networks:

• Move untrusted VMs to a separate VLAN.
• Apply Network Security Groups (NSG) in cloud environments (AWS/Azure).

Enforce Micro-segmentation:

• Use VMware NSX-T or Cisco ACI for zero-trust policies.

Result:

• Untrusted VMs cannot reach sensitive workloads.
• Compliance requirements are maintained.