“For sure it works but by default all traffic flows through the NetScaler”.
All traffic as in all TFTP boot file delivery traffic (which is relatively small considering that the ardpb32.bin file is about 34k) or all vdisk streaming traffic which should not be (if the stream servers included in the boot file is not a NetScaler VIP?
DSR, USIP etc and all the previous complexities associated with TFTP load balancing in pre NetScaler 10.1 are no longer applicable with native TFTP load balancing available in NS 10.1 though that is not to say using a boot ISO is less attrative.