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Home > Archive > CCNP > October 2000 > STP
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| I plan to take this switching exam this week and I just am trying to clear up some things..Ok I understand tht before you cretae a vlan you must establish a vtp domain for administrative purposes, than you can create youre vlans, then your trunks so that you can communicate with other vlans, My question(s) is stp,is stp only used when you have redundant trunk links? How is everything affected when stp fails? how does stp fail? | |
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| NO, STP is not just used when redundant links are used, but it is used to prevent loops. When it fails, usually meaning the root bridge failed, it has to go through a "respan" and wait for the timers to expire and the next in line to be root pick up. Usually would fail if a switch went down for some reason.
the CCIE Lan Switching uses 2 chapters to cover this in great detail. definetly worth the read before the BCMSN. I used it and had no problems with this exam. | |
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| Mr. txn is bringing up an excellent point. It's important to know that STP is used EVERYWHERE unless you explicitly turn it off. But where it really actually does is when you have redundant links.
STP only really fails when you let me set up your network  Really, STP doesn't really fail (unless you screw up bad), it just takes some time to rebuild the tree when something changes or goes awry.
Is it possible, without boneheaded intervention, that spanning tree can really fail? Like fall over and die?
MadChef |
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