Vmid - Cisco MDS 9000 Series Configuration Manual

Managing FLOGI, Name Server, FDMI, and RSCN Databases
Displays Details for the Specified HBA Entry
switch# show fdmi database detail hba-id 21:01:00:e0:8b:2a:f6:54 vsan 1
Node Name
Manufacturer
Serial Num
Model
Model Description:QLogic QLA2342 PCI Fibre Channel Adapter
Hardware Ver
Driver Ver
ROM Ver
Firmware Ver
OS Name/Ver
CT Payload Len
Port-id: 21:01:00:e0:8b:2a:f6:54

VMID

The switch-based Virtual Machine Identifier (VMID) feature allows identification of traffic sources at an
individual virtual machine (VM) level by the SAN fabric infrastructure.
VMID on the MDS switch provides a range of identifiers to a host hypervisor. These identifiers can then be
assigned to local VMs by the hypervisor. Supplemental information about the VM assigned to an identifier
is reported back to the switch. The identifiers are then inserted into the CS_CTL field of traffic from the VMs
by the hypervisor, allowing identification of the traffic source by the SAN fabric.
The VMID feature uses the following IDs:
• Virtual Entity (VE)—Refers to any virtual device.
• Virtual Entities Manager (VEM)—Refers to a hypervisor.
• Virtual Entity Identifier (VE ID): Refers to the different types of identifiers assigned to VEs. There are
• Fabric ports on a VEM comprise of the following N_Ports:
:20:01:00:e0:8b:2a:f6:54
:QLogic Corporation
:\74262
:QLA2342
:FC5010409-10
:8.2.3.10 Beta 2 Test 1 DBG (W2K VI)
:1.24
:03.02.13.
:500
:2040
four types of VE IDs:
• Local VE ID—Local VE ID is used to uniquely identify a VE within a VEM N_Port. Local VE IDs
change when virtual machines come up, go down, or go through migration between VEMs.
• Fabric VE ID—Fabric VE ID is used to uniquely identify a VE within a fabric. It is a combination
of the VEM N_Port FCID and the Local VE ID.
• Global VE ID—Global VE ID is used to uniquely identify a VE and is a 16-byte Universally Unique
Identifier (UUID). The Global VE ID is assigned by a service outside the SAN fabric such as a VM
management platform. Once a global VE ID is assigned, it does not expire.
• VEM ID—VEM ID is used to uniquely identify a VEM and is a 16-byte UUID. The VEM ID is
assigned by a service outside the SAN fabric such as a VM management platform.
• Physical Network Port (PN_Port)—A physical network port of a hypervisor host bus adapter (HBA).
• Virtual Network Port (VN_Port)—An optional virtual network port that can be shared by a set of
VEs. A PN_Port can have multiple VN_Ports. Each VN_Port is allocated a unique FCID.
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
VMID
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