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TOPIC: STP protocol

STP protocol 11 years 10 months ago #18549

Hi,

This doubt is regarding STP protocol, I have two switches A and B, there are 2 links between A and B, A is the root bridge. I want all the four ports, that is 2 ports in switch A and 2 ports in switch B to be in forwarding mode.

By theory, Switch B one port will be a Root port and one will be in a blocked mode. Switch A both port will be in a forwarding mode.

I want to know is it possible to make all four ports in forwarding mode..

plss reply if u can and solve the query

cheers

dipen

Re: STP protocol 11 years 10 months ago #18571

STP will only block one or more ports if there is a network loop. That is its function. So eliminate any loops and all your ports will be in the forwarding state

Re: STP protocol 11 years 10 months ago #18597

  • S0lo
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As far as I know, In your setup, One of the two ports in switch B must be blocked. You can try disabling STP protocol from running like this:

no spanning-tree vlan 1

But this will definitly cause loops and therefore... problems.
Studying CCNP...

Ammar Muqaddas
Forum Moderator
www.firewall.cx

STP protocol 11 years 10 months ago #18645

Hey,

Thanks for your response, I also found out the rite answer, It is possible to make all four ports in forwarding ports when STP is running between two switches. The answer is Link aggregation on those links will make all four ports in forwarding ports logically and not physically, when the port goes down or the link fails, link aggregation comes into play.

Take care

Re: STP protocol 11 years 10 months ago #18654

Yes, the link aggregation is eliminating the loops in your network by combining (aggregating) your two separate physical links into one logical link. So, as far as STP is concerned, there is no longer any loop
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