Hi All,

A customer asked me about the size of the Ethernet frames used between 2 HSX clusters during Auxiliary Copies.

From what I understand, the customer is concerned that the frames are too small. And that in relation to certain network components, the throughput obtained is not very high if the frames are small.

And he asks me to put the question to Commvault ...As I understand it, this is independent of Commvault. But I'd like to check my understanding to the community.

Ethernet has a minimum frame size of 64 bytes. It also has a maximum frame size of 1518 bytes. (if jumbo frame is not configured).

For Auxiliary Copy jobs between HSX clusters, Commvault uses 128kB data blocks.

These data blocks are sent to the Rocky Linux kernel, which splits them into 1500-byte segments (if jumbo frame is not configured) and sends them to the Ethernet interface driver.

Can you please confirm my correct understanding? Is there any reason why Ethernet frames should not be the maximum size?

Regards,

Luc