Displaying MSTP Root Guard Configuration
You can display the MSTP root guard
configuration information.
Use the following show commands from privileged EXEC mode to display
MSTP information.
The following example displays the MSTP root guard configuration.
device# show mstp MSTP Instance 0 (CIST) - VLANs: 1 ---------------------------------------------------------------------------- Bridge Bridge Bridge Bridge Bridge Root Root Root Root Identifier MaxAge Hello FwdDly Hop MaxAge Hello FwdDly Hop hex sec sec sec cnt sec sec sec cnt 200000000000000a 20 2 15 20 20 2 15 20 Root ExtPath RegionalRoot IntPath Designated Root Bridge Cost Bridge Cost Bridge Port hex hex hex 200000000000000a 0 200000000000000a 0 200000000000000a Root Port Pri Port PortPath P2P Edge Role State Designa- Designated Num Id Cost Mac Port ted cost bridge 1/1/5 128 193 1400 F F DESIGNATE RT-INCO 0 200000000000000a MSTP Instance 1 - VLANs: 20 ---------------------------------------------------------------------------- Bridge Max RegionalRoot IntPath Designated Root Root Identifier Hop Bridge Cost Bridge Port Hop hex cnt hex hex cnt 200100000000000a 20 200100000000000a 0 200100000000000a Root 20 Port Pri Port PortPath Role State Designa- Designated Num Id Cost ted cost bridge 1/1/5 128 193 1400 DESIGNATE FORWARD 0 200100000000000a
A root-inconsistent port is indicated by RTINCO.
The following example verifies whether MSTP
instances are in consistent or inconsistent state by using the show mstp
root-protect command.
device# show mstp root-protect Port MSTI Current State 1/1/5 MSTI 1 Consistent state 1/1/5 CIST Inconsistent state (59 seconds left on timer)