Dear Asif, Please check reference and also my past comments. R5 is root; consider situation that link between R3 and R4 and also between R3 and R5 are broken at same time. R3 will receive superior BPDU from R1 link and this port would be root port, unless R3 and all hosts are connected to that will be isolated from network. if you configure root guard on it you will not be able to make use of your redundancy you have configured in first place.
I know "Portfast and bpdu guard are not part of discussion over here" I just mentioned best practice instead of configuring root guard on access ports. 2011/11/15 Syed Asif Raza <[email protected]> > Dear Pedram, > > As per Amit he wants to make R5 as root bridge and no other should become > the root bridge, for this reason, i have suggested to use root guard on the > ports which should not have a superior BPDU. Portfast and bpdu guard are > not part of discussion over here. > > Regards, > CCIE (R&S) 29012 > > ------------------------------ > Date: Tue, 15 Nov 2011 15:39:50 +1100 > Subject: Re: [OSL | CCIE_RS] Rootguard placement > From: [email protected] > To: [email protected] > CC: [email protected]; [email protected]; [email protected]; > [email protected] > > Sorry Asif, but I would say your answer is not correct. > > Amit if that is all your topology, just configure it in your access ports. > (However, it is not recommended to have R5 as root in this topology; root > usually should be in middle of your network. R4/R3 are much better for > that; and also for access ports having portfast+bpduguard is better > solution) > > All redundant ports between switches potentially could be root port as I > mentioned in the other posts and shouldn't be configured with root gurad. > 2011/11/15 Syed Asif Raza <[email protected]> > > Enable root guard on interfaces between R3 and R1 R4 and R2. > > > > > > ------------------------------ > Date: Tue, 15 Nov 2011 08:59:22 +0530 > Subject: Re: [OSL | CCIE_RS] Rootguard placement > From: [email protected] > To: [email protected] > CC: [email protected]; [email protected]; [email protected]; > [email protected] > > > > hi guys, > > Yes all i want is R5 to be the root and there is no notion of secondary > root bridges.. > So now with the below diagram kindly let me know on what interfaces should > root guard be enabled? > > > > > > R5 > | | > | | > | | > R3---------R4 > | | > | | > R1---------R2 > > > _______________________________________________ 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
