I have two 4505's that I am using as my core in a redundant\nconfiguration. All closet switches have a connection to each core.\nOnce core is set to be the primary root, and the second 4506 is set to\nbe the secondary root.\n\nI was looking at the following command "spanning-tree guard root".\n\nIt seems that I would place this on all my ports on the root that\nconnect to the closet switches. My understanding if it received a\nmore favorable BPDU on that port on the core switch it would shut that\nlink down preventing a STP topology change.\n\nCouple of questions based on this?\n1.) How often is this command really used?\n2.) Is this more of a safety feature?\n3.) Would this command just be placed on the Root switch? Would I\nleave this off of the Second 4506 which is configured as a sucessor to\nthe root switch in case of failure?\n\nAmy.