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Reset switch takes down whole network for 30 seconds

I have a network set up with about 8 switches set up in a star topology with a central switch connecting to each of the other switches with fiber. I am trying to determine why when I reset a switch out on one of the ends of the star it seems to take down the whole network for about 30 seconds or so. Any Ideas of where I can look? These are dell switches.

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Matt V

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Jimmy Larsson, CISSP, CEH

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snogopher

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It appears they are currently set to classic stp, they have an option for rapid stp or multiple stp also. If I change to rapid stp do all switches on the network need to support this?

Wolfhere

Following on Matt's comment, try configuring the port on the main switch that this particular switch is coming in from - spanning-tree portfast. This would negate any detection of loop backs between the two switches...but if physical security is not an issue, you can leave portfast on (spanning-tree portfast would be the logical opposite of spanning-tree algorithm)

Jimmy Larsson, CISSP, CEH

Setting inter-switch-links as portfast is absolutely not recommended.

/Kvistofta

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Valutus

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snogopher

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This info was very helpful, thanks all