Chapter 18
| Spanning Tree Commands
– 455 –
spanning-tree
protocol-migration
This command re-checks the appropriate BPDU format to send on the selected
interface.
Syntax
spanning-tree
protocol-migration
interface
interface
ethernet
unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-10/28)
port-channel
channel-id (Range: 1-8)
Command Mode
Privileged Exec
Command Usage
If at any time the switch detects STP BPDUs, including Configuration or Topology
Change Notification BPDUs, it will automatically set the selected interface to forced
STP-compatible mode. However, you can also use the
spanning-tree protocol-
migration
command at any time to manually re-check the appropriate BPDU
format to send on the selected interfaces (i.e., RSTP or STP-compatible).
Example
Console#spanning-tree protocol-migration ethernet 1/5
Console#
show spanning-tree
This command shows the configuration for the common spanning tree (CST), for all
instances within the multiple spanning tree (MST), or for a specific instance within
the multiple spanning tree (MST).
Syntax
show spanning-tree
[interface |
mst
instance-id |
brief
|
stp-enabled-only
]
interface
ethernet
unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-10/28)
port-channel
channel-id (Range: 1-8)
instance-id - Instance identifier of the multiple spanning tree.
(Range: 0-4094)
brief
- Shows a summary of global and interface settings.
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