How can I configure Spanning Tree

Hello

I have several core Dell passes using PowerConnect 6224 s most - these ink in my Cisco provider kit. We run several VLAN and have redundant links between stacked switches.

I have read up on top of the tree covering weight and have the following tasks:

1 map of the network - including the ID of the root bridge, root ports, roads blocked, age max and time of helo

Once I made my analysis information, I don't know how to better optimize the covering tree config, so far I have:

1. make sure RSTP is enabled on all switches
2. make sure that all edge ports have spanning port configured fast shaft
3. not declare spanning port fast shaft on the links between switches
4 force speed and duplex settings on all ports to link between the switches (I guess that's because the auto negotiate takes more time?)

I'm not sure is:
1 can I use BPDU guard and if so, where?
2 can I use root guard and if so, where?

I read the informative article by Todd: http://en.community.dell.com/support-forums/network-switches/f/866/t/19465205.aspx

But, I don't know where\whether I should to configure the options of guard - am happy to provide additional information as needed.

Thank you

Spanning Tree BPDU Guard is used to disable the port where a new device tries to enter the already

existing STP topology. Thus the devices, which were originally not part of STP, are not allowed to

influence the STP topology. If the Enable value, when a BPDU is received on a port of the tip, this port is disabled. Once the port has been disabled it requires manual intervention to be reactivated.

Spanning Tree Root Guard is used to prevent change of the root of a Spanning Tree instance

in an unexpected way. The priority of an ID of adjustable bridge to zero but another bridge with a low mac ID

address could also set its priority to zero and take root.

Both are defined globally on the switch. If you have any possibility of other network devices being plugged into the switch without your knowledge. It may be a good idea to these permits after that STP is configured on the network. That way if someone randomly connected network with STP on this device, it will not throw your network for a loop.

Here are some good white pages on the tree covering weight

www.Dell.com/.../app_note_13.pdf

www.Dell.com/.../app_note_1.pdf

www.Dell.com/.../pwcnt_MSTP_interoperability.pdf

Thank you

Tags: Dell Switches

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