Hi Amit, In the document you indicate, it's placed on Switch C on the interface facing Switch D - Switch C is not the root bridge though.
Place rootguard on any interface you don't want to receive superior BPDUs from but still expect to be involved in the STP topology (otherwise you could take other protective measures such as bpdufiltering however if that peer device also has another connection into your switching domain and could introduce a bridging loop). Simply described, rootguard prevents a new device (typically outside of your administrative control) from influencing the placement of the rootbridge in the network which could provide a sub-optimal topology in your network by moving the port with the new device claiming it should be the root bridge into a root inconsistent state until it stops sending BPDUs that are superior to the current root, at which state it becomes a regular STP interacting port. Cheers, Adam On Mon, Nov 14, 2011 at 7:19 PM, Amit Jp <[email protected]> wrote: > Hi, > > > I need to knwo where exactly should the root guard should be configured. I > feel it should always be on Root Switch . > > And if not kindly explain with a diagram . > I have this Link( > > http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800ae96b.shtml > ) > but i am still confused abt it. What should go wrong if i have this > commmand on Root Swtich. > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
