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TOPIC: How can I disable STP on per port basis for CISCO switch?

How can I disable STP on per port basis for CISCO switch? 8 years 3 months ago #26475

  • AhDon
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Hi All,

Any advise if I turn off STP on per port basis for CISCO switch?
Any impact on the switches?

The reason is that we are implementing HA for our firewall however according to our vendor the STP enabled on our cisco is casusing the a HA to fail. Hence, I would need your all advise on this matter. Thks in advance.

Rgds
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Re: How can I disable STP on per port basis for CISCO switch? 8 years 3 months ago #26482

  • S0lo
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I don't know about port based. But there is VLAN based, try:

[code:1]
no spanning-tree vlan ?
[/code:1]

Impact, you have to manually make sure that there are no loops. i.e. no 2 or more switches/VLANs connected in a circle.
Studying CCNP...

Ammar Muqaddas
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Re: How can I disable STP on per port basis for CISCO switch? 8 years 3 months ago #26542

  • Daze
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spanning-tree portfast
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Re: How can I disable STP on per port basis for CISCO switch? 8 years 3 months ago #26586

  • Tarun
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spanning-tree portfast

'spanning-tree portfast' would not disable STP on a port, in fact a port configured for 'spanning-tree portfast' should never be connected to a switch or a device that can generate BPDU's.

If you configure 'spanning-tree portfast' on a port, it will give you a warning saying that this port should not be connected to a switch & similar other devices. Portfast is configured strictly on ports that are meant to be connected to hosts.

You can disable spanning-tree by using the command 'no span vlan <vlan-number>' if you are running PVST or just by using 'no span' on that port.
Next would be SP (Service Provider)
CCNA, CCNP (Switching), CCIE#20640
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