Tag: CDN

Consistent Device Naming (CDN) allows Ethernet interfaces to be named in a consistent manner.

VMware vNIC placement order not adhered to Cisco UCS configuration – How to fix it?

It is better to use Cisco UCS Consistent Device Naming CDN + ESXi 6.7, but in same casses. It is necessary fix manualy according KB – How VMware ESXi determines the order in which names are assigned to devices (2091560) .

Here is an example How to fix it:

Check current mapping

[~] esxcfg-nics -l
 Name    PCI           MAC Address       
 vmnic0  0000:67:00.0  00:25:b5:00:a0:0e 
 vmnic1  0000:67:00.1  00:25:b5:00:b2:2f 
 vmnic2  0000:62:00.0  00:25:b5:00:a0:2e 
 vmnic3  0000:62:00.1  00:25:b5:00:b2:4f 
 vmnic4  0000:62:00.2  00:25:b5:00:a0:3e 

[~] localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias list
 Bus type  Bus address            Alias
 pci       s00000002:03.02        vmnic4
 pci       s00000002:03.01        vmnic3
 pci       s0000000b:03.00        vmnic0
 pci       s0000000b:03.01        vmnic1
 pci       p0000:00:11.5          vmhba0
 pci       s00000002:03.00        vmnic2
 logical   pci#s0000000b:03.00#0  vmnic0
 logical   pci#s0000000b:03.01#0  vmnic1
 logical   pci#s00000002:03.01#0  vmnic3
 logical   pci#s00000002:03.02#0  vmnic4
 logical   pci#p0000:00:11.5#0    vmhba0
 logical   pci#s00000002:03.00#0  vmnic2

Fix transfer table for physical devices 

Bus type  Bus address            Alias
 pci       s0000000b:03.00        vmnic0 --> vmnic3
 pci       s0000000b:03.01        vmnic1 --> vmnic4
 pci       s00000002:03.00        vmnic2 --> vmnic0
 pci       s00000002:03.01        vmnic3 --> vmnic1
 pci       s00000002:03.02        vmnic4 --> vmnic2

Fix commands for physical devices 

localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias store --alias vmnic0 --bus-address s00000002:03.00 --bus-type pci

 localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias store --alias vmnic1 --bus-address s00000002:03.01 --bus-type pci

 localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias store --alias vmnic2 --bus-address s00000002:03.02 --bus-type pci

 localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias store --alias vmnic3 --bus-address s0000000b:03.00 --bus-type pci

 localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias store --alias vmnic4 --bus-address s0000000b:03.01 --bus-type pci

Fix transfer table for logical devices 

[~] localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias list
 Bus type  Bus address            Alias
 logical   pci#s0000000b:03.00#0  vmnic0 --> vmnic3
 logical   pci#s0000000b:03.01#0  vmnic1 --> vmnic4
 logical   pci#s00000002:03.00#0  vmnic2 --> vmnic0
 logical   pci#s00000002:03.01#0  vmnic3 --> vmnic1
 logical   pci#s00000002:03.02#0  vmnic4 --> vmnic2

Fix commands for logical devices 

localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias store --alias vmnic0 --bus-address pci#s00000002:03.00#0 --bus-type logical

localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias store --alias vmnic1 --bus-address pci#s00000002:03.01#0 --bus-type logical

localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias store --alias vmnic2 --bus-address pci#s00000002:03.02#0 --bus-type logical

localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias store --alias vmnic3 --bus-address pci#s0000000b:03.00#0 --bus-type logical

localcli --plugin-dir /usr/lib/vmware/esxcli/int/ deviceInternal alias store --alias vmnic4 --bus-address pci#s0000000b:03.01#0 --bus-type logical

Reboot

reboot

Crosscheck – Now we have target order

[~] esxcfg-nics -l
 Name    PCI           MAC Address       
 vmnic0  0000:62:00.0  00:25:b5:00:a0:2e 
 vmnic1  0000:62:00.1  00:25:b5:00:b2:4f 
 vmnic2  0000:62:00.2  00:25:b5:00:a0:3e 
 vmnic3  0000:67:00.0  00:25:b5:00:a0:0e 
 vmnic4  0000:67:00.1  00:25:b5:00:b2:2f

Cisco UCS supports Consistent Device Naming CDN in ESXi 6.7

Cisco introduced Consistent Device Naming in Cisco UCS Manager Release 2.2(4).

In the past I could saw that VMware vNIC placement order not adhered to Cisco UCS configuration. But his issue will not be seen in the latest ESXi updates – ESXi 6.5 U2 and ESXi 6.7 U1.

VMware vNIC placement order not adhered to Cisco UCS configuration – How to fix it?

How VMware ESXi determines the order in which names are assigned to devices (2091560)

When there is no mechanism for the Operating System to label Ethernet interfaces in a consistent manner. It becomes difficult to manage network connections with server configuration changes.

Allows Ethernet interfaces to be named in a consistent manner. This makes Ethernet interface names more persistent when adapter or other configuration changes are made.

To configure CDN for a vNIC, do the following:

This makes Ethernet interface names more uniform, easy to identify, and persistent when adapter or other configuration changes are made.

 set consistent-device-name-control cdn-name

Whether consistent device naming is enabled or not. This can be one of the following:

  • enabled—Consistent device naming is enabled for the BIOS policy. This enables Ethernet interfaces to be named consistently.
  • disabled—Consistent device naming is disabled for the BIOS policy.
  • platform-default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.