Reviewing and Setting Edge Port Status

Note

To use the SpanGuard function, you must know which ports are connected between switching devices as ISLs (inter-switch links). Also, you must configure edge port status (adminedge = true or false) on the entire switch, as described in Defining Edge Port Status, before SpanGuard will work properly.

Review and set edge port status as follows:

1. Use the show commands described in to determine edge port administrative status on the device.
2. Set edge port administrative status to false on all known ISLs.
3. Set edge port administrative status to true on any remaining ports where SpanGuard protection is desired. This indicates to SpanGuard that these ports are not expecting to receive any BPDUs. If these ports do receive BPDUs, they will become locked.