I have a 4510R-E switch operating as Core. I have 3 4507R-E & 2 4506 switches operating as access switches. the 4507R-E switches are new switches which is recently got to network.the core switch is in server mode & the remaining switches are in client mode. However, only the switches of 4506 series are operating porperly with all the L2 VLANS refelcting immediately. However teh L2 vlans are not advertised to the switches of 4507R-E series & no L2 VLANs present. I have to move these switches to transparent mode, create VLANs and then move it back to client mode. Can any one one let me know, where the problem lies?