802.1d spanning tree vs rapid spanning tree

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Jul 11th, 2008
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Hi all, im thinking of moving to rstp in one of my new networks, firstly, can anyone tell me the major differences between the 2? and do I need to configure anything when implementing rstp? ie do you still have a root bridge, and if so can you set it manually like normal stp ?


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glen.grant Fri, 07/11/2008 - 03:20
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Yes you still have all the normal spanning tree parameters . The main difference that RSTP will converge when there is a change much faster usually within a couple seconds as opposed to like 45-50 seconds for normal spanning tree .

bvsnarayana03 Fri, 07/11/2008 - 03:39
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as mentioned, RSTP is bit faster in terms of timers & convergence. There are no separate listening & learning states so it saves 15 seconds of the time. also in case of recalculations, it doesnt have to wait for the max-age to expire but it would reconverge the entire topology after 2 BPDU's are missed.

bvsnarayana03 Sat, 07/12/2008 - 07:49
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Root is mandatory is all types of spanning-trees.

rafaelgarcia Sat, 07/12/2008 - 10:04
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Rapid spanning-tree also permits you to configure a secondary root switch in case the primary fails. It also has many features such as bpud guard, root guard, etc to maintain the network's integrity.


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