Hyper-V HA Layer-2 switches. Manual (peer-to-peer) and active-passive. Cluster virtual MAC addresses Synchronizing the configuration Synchronizing kernel. So the MAC address has 3 bytes fixed “00-15-5d”, followed by 2 bytes specific to the current host, and one byte as the individual MAC in this Pool. Vnic Mac Addresses Manual Pdf This algorithm works fine on a standalone host until you create less than 256 NIC’s. The final eight bits of the MAC address are set to a hash value based on the name of the virtual machine’s configuration file. For example, if a machine's IP address was 192.34.14.81 (or in hex, 0xc0220e51) and the configuration file was hashed to the value of 95, the MAC address would have the following value: 00:05:69:0e:51:95.
-->Important
This version of Virtual Machine Manager (VMM) has reached the end of support, we recommend you to upgrade to VMM 2019.
This article provides information about System Center - Virtual Machine Manager (VMM) default MAC addresses, and describes how to create and manage a custom MAC address pool.
VMM uses static MAC address pools to automatically generate and assign MAC address to VMs. This article describes default MAC address pools in the VMM fabric and explains how to create custom pools.
Default MAC address pool settings:
| MAC pool name | Environment | Default range |
|---|---|---|
| Default MAC address pool | Hyper-V | 00:1D:D8:B7:1C:00 – 00:1D:D8:F4:1F:FF |
| Default VMware MAC address pool | ESX/ESXi | 00:50:56:00:00:00 – 00:50:56:3F:FF:FF |
Before you start
Before you create a custom MAC pool note that:
- If you want to divide one of the default pools into smaller custom pools, you must first delete the default MAC address pool or the default VMware MAC address pool. You must delete the default pool to avoid duplicate MAC address assignments.
- The first three octets of the beginning and ending MAC address must be the same.
- You must enter a valid hexadecimal values between 00 and FF.
- The ranges that you specify cannot overlap.
- The address range must not have the multi-cast bit set to 1. For example, you cannot use addresses that start with X1, X3, X5, X7, X9, XB, XD, or XF, where X is any value.
- To avoid conflicts with addresses reserved by Microsoft, VMware, and Citrix, do not use the following prefixes:
- Reserved for Microsoft: 00:03:FF; 00:0D:3A; 00:12:5A; 00:15:5D; 00:17:FA; 00:50:F2; 00:1D:D8 (except for the 00:1D:D8:B7:1C:00 – 00:1D:D8:F4:1F:FF range that is reserved for VMM)
- Reserved for VMware: 00:05:69; 00:0C:29; 00:1C:14; 00:50:56 (except for the 00:50:56:00:00:00 – 00:50:56:3F:FF:FF range that is the reserved as the default VMware static range)
Hyper-v Mac Address Dynamic Or Static
Create a custom pool
- Click Fabric > Networking > MAC Address Pools > Home > Show > Fabric Resources > Create > Create MAC Pool.
- In Create MAC Address Pool Wizard > Name and Host Group specify a name and description. In Host Group select the host groups that should use the pool.
- In MAC Address Range specify the start and end addresses.
- In Summary review the settings and click Finish. When the job shows as Completed verify pool in MAC Pools.
Release IP addresses
In some circumstances you might want to remove addresses from the MAC pool. For example if a host that was assigned an IP address during bare metal deployment is removed from VMM management, or if a VM goes into a missing state because it was removed outside VMM.
Hyper-v Set Static Mac Address
- Click Fabric > Networking > MAC Address Pools > Home > Show > Fabric Resources.
- In MAC Pools click the pool you want to modify > Properties.
- In Inactive addresses select the addresses you want to release.
Next steps
Learn about creating an IP address pool.