Why CDP of UCS shows Wrong MTU size on VMware ESXI 5.5?

[Windows Admins]

Hi,

Why when I check the CDP on VMware ESXI show me the MTU size 1500. but on UCS is configured 9000 and I check that Jumbo frame is working fine.

Thanks

[Kirk J]

Greetings.

The UCSM, and most Nexus switches use the frame size set in the QOS classes to determine how to handle frames larger than 1500.  CDP just detects the generic, non QOS capable, values.

For instance FC/FCOE and Platinum may allow larger than 1500, but best effort only allows 1500.

Thanks,

Kirk...