[email protected]# run show spanning-tree interface Spanning tree interface parameters for VLAN 114 Interface Port ID Designated Designated Port State Role port ID bridge ID Cost ge-0/0/14.0 128:527 128:527 32882.28c0da3d5041 200000000 FWD ROOT
Nov 22, 2006 · Determine why devices that are connected to the listed ports are not sending BPDUs. One reason could be that they do not run the Spanning Tree Protocol; in this case, you should disable loop guard in the inconsistent interfaces or start the spanning tree protocol on the other side of the links, depending on the context.
Re: Problem with ports blocked by STP and/or LACP (ProCurve 2800) STP, or Spanning Tree Protocol, is designed to eliminate switching loops by making sure each switch has only one path to every other switch.
A Blocked Port will only process received BPDUs from neighboring switches. A port that can be selected as Root Port or Designated Port will transition to Listening state. In this state the port will be allowed to send BPDUs as well so that it can actively participate in Spanning-tree.
- Non-Designated Port (NDP) - It is a port that is in a blocking state in the STP topology. so your question is about which port in SW3 will be selected as Root Port. As soon as the root has been elected, all non-root switches begin to calculate which port is the best (the least cost) towards the root bridge. This port will be called the root port.
Port is now off-line; The port enters STP blocked when it is first brought up. There is a 3 second delay before the port can be brought on-line. This is due to the auto-edge feature, which waits 3 seconds and if it doesn't receive any STP BPDUs, it decides the port is an STP edge port and brings it on-line without waiting for the normal STP timers.
CLI Statement. ACX Series,EX Series,QFX Series,SRX Series,MX Series,EX Series,NFX Series. Configure bridge protocol data unit (BPDU) protection on all edge ports of a switch. When the bpdu-block-on-edge statement is configured and the interface encounters an incompatible BPDU, the interface shuts down.