Each DPU controller d has a different identifier printed on the label: serial number and the card MAC for the Ethernet protocol and the card GUID for the InfiniBand protocol. VPI cards have both a GUID and a MAC (derived from the GUID).
Warning
The product revisions indicated on the labels in the following figures do not necessarily represent the latest revisions of the cards.
Board Label Example
![image2020-9-8_9-59-11.png](https://docscontent.nvidia.com/dims4/default/cd8df7f/2147483647/strip/true/crop/343x225+0+0/resize/343x225!/quality/90/?url=https%3A%2F%2Fk3-prod-nvidia-docs.s3.us-west-2.amazonaws.com%2Fbrightspot%2Fconfluence%2F0000018a-8573-d266-abab-97ffa7260000%2Fimages%2Fnetworking%2Fdownload%2Fattachments%2F111579416%2Fimage2020-9-8_9-59-11.png)