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Booting and resetting too fast for Cisco switches

ReD-MaN
I have a Cisco 3560 switch here at home, and in the default config the AP boots and resets too quickly.

By the time the speed negotiation completes, and spanning tree sorts itself out, the AP has already reset, causing it all to happen again.

I had to issue the following to get these AP to work with it:

interface FastEthernet0/44
 switchport mode access
 speed 100
 duplex full
 spanning-tree portfast

Once I added those, the switchport lights up quickly, and the AP got online.
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  • 0 in reply to Robert Tausend
    It has to do with how *slow* some Cisco switches are, without special configuration, at recognizing whether a port is a spanning tree port or not.  IIRC, newer builds of IOS for the newer Cisco switches default to having all ethernet ports set as "portfast" ports, which fixes the problem "out of the box."  Older builds default to a slower spanning tree protocol.  In my experience, most newer switches that support spanning tree default to a "Fast" spanning tree detection algorithm to skirt the issue.

    CTO, Convergent Information Security Solutions, LLC

    https://www.convergesecurity.com

    Advice given as posted on this forum does not construe a support relationship or other relationship with Convergent Information Security Solutions, LLC or its subsidiaries.  Use the advice given at your own risk.

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