Specifications

Displaying Spanning Tree Information
RoamAbout Mobility System Software Configuration Guide 13-11
Displaying Spanning Tree Information
YoucanuseCLIcommandstodisplaythefollowingSTPinformation:
•BridgeSTPsettingsandindividualportinformation
•Blockedports
•Statistics
•Portfast,backbonefast,anduplinkfastconvergenceinformation
Displaying STP Bridge and Port Information
TodisplaySTPbridgeandportinformation,usethefollowingcommand:
show spantree [port port-list | vlan vlan-id] [active]
Bydefault,STPinformationforallportsandallVLANsisdisplayed.TodisplaySTPinformation
forspecificportsoraspecificVLANonly,enteraportlistoraVLANnameornumber.Foreach
VLAN,onlytheportscontainedintheVLANarelistedinthecommandoutput.
To
listonlytheportsthatareintheactive(forwarding)state,entertheactiveoption.
Example
TodisplaySTPinformationforVLANmauve,typethefollowingcommand:
RBT-8100# show spantree vlan mauve
VLAN 3
Spanning tree mode PVST+
Spanning tree type IEEE
Spanning tree enabled
Designated Root 00-02-4a-70-49-f7
Designated Root Priority 32768
Designated Root Path Cost 19
Designated Root Port 1
Root Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
Bridge ID MAC ADDR 00-0b-0e-02-76-f7
Bridge ID Priority 32768
Bridge Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
Port Vlan STP-State Cost Prio Portfast
------------------------------------------------------------------------------
1 1 Forwarding 19 128 Disabled
2 1 Blocking 19 128 Disabled
3 1 Blocking 19 128 Disabled
10 1 Forwarding 19 128 Disabled
15 1 Blocking 19 128 Disabled
16 1 Blocking 19 128 Disabled
Note: For information about the show commands for the fast convergence features, see
“Configuring and Managing STP Fast Convergence Features” on page 13-7.