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I often see editing of grub2 parameters to change kernel parameters (i.e. loglevel, quiet, intremap, etc...), but I think there are also grub2 parameters and I'm lost to what they actually are.

Specifically, does grub2 need any special parameters to handle a network boot (PXE)? In legacy-grub, I've had to add macappend but I'm not sure if this is a kernel parameter or if it something for the grub configuration.

Thanks

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They are the same, the main difference is that kernel parameters can be set in three ways :

1- During the boot sequence GRUB via :

  a- The Grub interface during the boot.
  b- Configuration files with regenerating `grub.cfg` (permanent)

2- During the RunTime via :

sysctl command 
/proc/sys/* directory

3- By configuring and compiling the kernel from source.

Also don't confuse the GRUB properties with the ones on top, they are proper to GRUB , like :

Change the boot order.
Customize the grub menu / entries.
Change the default boot timeout.

Finally to boot from PXE you should have a network interface that support it and configure the server to boot from it on the BIOS.

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