How many traffic classes does the core support?
The PCI Express LogiCORE supports one virtual channel and one traffic class (VC0 and TC0). However, the core does not check if you send a traffic class other than "0". As a result, it will take what you assign and send it out. So, in theory, you can send any traffic class. However, keep in mind all configuration transactions sent must have a traffic class of 0 (TC0).