NIC port adapter name, description may differ when ipconfig /all command is run from the Veritas System Recovery Disk command prompt and when logged into Windows.

Article: 100063955
Last Published: 2024-03-12
Ratings: 0 0
Product(s): System Recovery

Problem
 

NIC port adapter name, description may differ when ipconfig /all command is run from the Veritas System Recovery Disk command prompt and when logged into Windows.
 

Error Message
 

Example :

IPCONFIG /all output from Windows :




IPCONFIG /all output when booted with System Recovery Disk :
 


Note: The network adapter name and description got interchanged. The MAC address is the same for each NIC port. It should not be perceived that Microsoft Hyper-V Network Adapter #2 is now assigned a different MAC address. 

 

Cause


The issue seems to be due to WinPE assigning the description according to when it discovers each NIC in a dual or quad port NIC controller.
 

Solution


Here are a few points to remember when the description of the NIC port changes.

1. The network adapter name and description getting changed for the NIC port may cause some confusion while assigning  the IP address to the particular NIC which is allowed to access the network storage.

2. In dual port NIC ( or more NIC systems), one can distinguish the correct NIC by keeping the network cable connected to that particular port (labeling each port with a number or using Tags to identify the NIC physically is helpful in such situations), which is assigned for accessing the network storage. Cables connected to other NIC ports can be removed until backup or restore is completed. An IPconfig /all command can be run to check which NIC has a cable connected and then an IP address should be assigned to it.

3. If the particular NIC cannot be distinguished by the method mentioned in point number 2, then an IP address can be assigned to the available NIC and connection can be checked. If the connection does not go through, try the next NIC. (It is important for scenarios where NIC binding is done)

4. The MAC address can be noted down for the NIC port (tagged for access to network storage location) when in normal mode (pre-disaster state) and whenever the need arises to perform a restore with VSR SRD, the description assigned to that MAC can be assigned the IP address to access the network storage location.

The following powershell command can be executed from Veritas System Recovery (VSR) System Recovery Disk (SRD). Powershell can only be used if SRD is created using advanced mode.
 

Steps :

(i) Boot with Veritas System Recovery Disk and launch Open Command Shell Window from Analyze section.

(ii) Type powershell in the command prompt windows and hit enter. 

(iii)
Execute the below command :
Get-CimInstance -ClassName Win32_NetworkAdapter | Select-Object Name, MacAddress, PNPDeviceID 

Generally, the MAC Address and Device ID of NIC are assigned in ascending order of NIC port.
Example: If NIC 1, Port 1 address is 00:15:5D:02:BE:01 then NIC 1, port 2 address will have a higher address, 00:15:5D:02:BE:0E as seen in the screenshot below. Then assign the IP address to the NIC which is tagged to access the network storage location.

It is important that one plans and physically tags port numbers of a multiport NIC when that particular port has access to network storage. This cadence can help in managing a large environment and especially when restorations are to be performed for many systems by being present at the site physically due to various business requirements or it being a secured site.



 



Note: If NIC binding is done, do not physically switch the network cables (if the connection does not go through). Connecting the cable to the other NIC port may cause the switch to sense a different MAC address and it may block all connections on that port. It is better to assign the IP address to the other NIC port of a dual port NIC or quad port NIC and then retry the connection to backup or restore to/from a network storage.
 

References

Etrack : 4150478

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