RSTP - Port disable

[claramunt_1]

How can I disabled spanning-tree in one port?

[Preston Gallwas]

Switch(config)# no span [ethernet] PORT-LIST

[claramunt_1]

Preston, this don't work....

Switch(config)# no span
[ethernet] PORT-LIST Configure the port-specific parameters of the spanning tree protocol for individual ports.


Switch(config)# no span ethernet
PORT-LIST Enter a list of ports or one port for the 'ethernet' command/parameter.

Switch(config)# no span ethernet 19
Incomplete input: 19

Switch(config)# no span ethernet 19
edge-port Set that port is connected to a LAN segment that does not have any bridge connected to it.
mcheck Force the port to transmit RST BPDUs.

Switch(config)# no span ethernet 19 edge-port



Switch(config)# sh span

Rapid Spanning Tree (RSTP) Information

STP Enabled : Yes
Force Version : RSTP-operation

...

Port Type Cost Priority State | Designated Bridge
---- --------- --------- -------- ---------- + -----------------
1 100/1000T 20000 128 Disabled |
2 100/1000T 20000 128 Disabled |
...
19 100/1000T 20000 128 Blocking | 001560-452e00
20 100/1000T 20000 128 Disabled |
21 100/1000T 20000 128 Disabled |
22 100/1000T 20000 128 Disabled |
23 100/1000T 20000 128 Disabled |
24 100/1000T 20000 128 Disabled |

[Anders_35 · Accepted solution]

AFAIK, you can't. You can use the edge-port parameter to say the port is not /expected/ to be connected to a bridge/other switch. This is similar to Cisco's portfast. BDPUs will not be sent on such ports, and they will be put more or less straight into forwarding mode, avoiding delays.
However, RSTP will detect any BDPUs received on the ports, and when it does, it will automatically revert the edge-port setting to prevent looping.

[claramunt_1]

That's right Anders. Thanks a lot.

[Matt Hobbs]

BPDU's will still be sent when a port is set to edge-port yes. As Anders said though they will go straight into forwarding.

[claramunt_1]

Is possible to set a port for not send BDPUs?