Page 18 | AlliedWare Plus™ OS How To Note: Switching
Multiple Spanning Tree Protocol (MSTP)
To check for general information about MSTP, and the CIST settings, enter Privileged Exec
mode and enter the command:
awplus#show spanning-tree
The output shows that Switch 3 is the CIST root bridge:
7. Check the configuration
% 1: Bridge up - Spanning Tree Enabled
% 1: CIST Root Path Cost 0 - CIST Root Port 5006 - CIST Bridge Priority 32768
% 1: Forward Delay 15 - Hello Time 2 - Max Age 20 - Max-hops 20
% 1: CIST Root Id 80000000cd127808
% 1: CIST Reg Root Id 80000000cd127808
% 1: CIST Bridge Id 80000000cd240331
% 1: portfast bpdu-filter disabled
% 1: portfast bpdu-guard disabled
% 1: portfast errdisable timeout disabled
% 1: portfast errdisable timeout interval 300 sec
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% port1.0.5: Port 5005 - Id 838d - Role Alternate - State Discarding
% port1.0.5: Designated External Path Cost 0 -Internal Path Cost 200000
% port1.0.5: Configured Path Cost 20000 - Add type Explicit ref count 3
% port1.0.5: Designated Port Id 8005 - CIST Priority 128 -
% port1.0.5: CIST Root 80000000cd127808
% port1.0.5: Regional Root 80000000cd127808
% port1.0.5: Designated Bridge 80000000cd240226
% port1.0.5: Message Age 0 - Max Age 20
% port1.0.5: CIST Hello Time 2 - Forward Delay 15
% port1.0.5: CIST Forward Timer 0 - Msg Age Timer 4 - Hello Timer 0 - topo change
timer 0
% port1.0.5: forward-transitions 1
% port1.0.5: Version Multiple Spanning Tree Protocol - Received MSTP - Send MSTP
% port1.0.5: No portfast configured - Current portfast off
% port1.0.5: portfast bpdu-guard default - Current portfast bpdu-guard off
% port1.0.5: portfast bpdu-filter default - Current portfast bpdu-filter off
% port1.0.5: no root guard configured - Current root guard off
% port1.0.5: Configured Link Type point-to-point - Current point-to-point
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