Spanning tree blocks a port

[krranjith]

Hi,

I  have a 2950 with one of my Pc is connected to its fa0/1 ethernet port.  The port fa 0/24 is connected to the 10.0.0.0/24 network with Dhcp  enabled. When I start to connect this network, getting an error as port  0/24 is blocked by spanning tree. If I enter to the port 0/24 and  disabling the spanning tree, getting the connectivity.

There is no any redundancy link between the switches.

So please let me know what may have the reasons.

Ranji..

[cadet alain]

Hi,

Can you post output of following:

-sh int f0/24 status

-sh spann

-sh run int f0/24

Regards.

Alain.

[Somasundaram Jayaraman]

Hi,

Spanning tree blocks a port if there were redundant paths.

If the interface fa 0/24 is a access port then you can configure as portfast.

If the link is a trunk link then we need to check the vlans allowed on the link. Could you please share the below requested outputs

Sh interface fa 0/24 switchport

sh interface fa 0/24 trunk

sh spanning-tree inter fa 0/24

I would suggest you to check if there are any redundant paths to the network,

Hope this helps.

Cheers

Somu