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## Specify MST Forward Time, Hello Time, and Max Age

The syntax for this command is as follows:

    spanning-tree mst {forward-time short_4-30 | hello-time short_1-2 | max-age short_6-40}

1. Set the forward time as 30.

       SEFOS(config)# spanning-tree mst forward-time 30

2. View the output in switch 1.

       SEFOS# sh spanning-tree
       Root Id     Priority   32768                Address    00:01:02:03:04:01                Cost       0                Port       0 [0]
                       This bridge is the root                Max age 20 Sec, forward delay 30 Sec                Hello Time 2 Sec

       MST00

       Spanning tree Protocol has been enabled

       MST00 is executing the mstp compatible Multiple Spanning Tree Protocol
       Bridge Id       Priority  32768                Address  00:01:02:03:04:01                Max age is 20 sec, forward delay is 30 sec                Hello Time is 2 sec                Dynamic Path Cost is Disabled                Dynamic Path Cost Lag-Speed Change is Disabled

3. Reset the forward time.

       SEFOS(config)# no spanning-tree mst forward-time

4. View the output in switch 1

       SEFOS# show spanning-tree
       Root Id     Priority   32768                Address    00:01:02:03:04:01                Cost       0                Port       0 [0]                This bridge is the root                Max age 20 Sec, forward delay 15 Sec                Hello Time 2 Sec

       MST00

       Spanning tree Protocol has been enabled

       MST00 is executing the mstp comp. Multiple Spanning Tree Protocol
       Bridge Id       Priority  32768                Address  00:01:02:03:04:01                Max age is 20 sec, forward delay is 15 sec                Hello Time is 2 sec                Dynamic Path Cost is Disabled                Dynamic Path Cost Lag-Speed Change is Disabled

5. Set the hello time.

       SEFOS(config)# spanning-tree mst hello-time 1

6. View the output in switch 1.

       SEFOS# show spanning-tree
       Root Id         Priority   32768                Address    00:01:02:03:04:01                Cost       0                Port       0 [0]                This bridge is the root                Max age 20 Sec, forward delay 15 Sec                Hello Time 1 Sec

       MST00

       Spanning tree Protocol has been enabled

       MST00 is executing the mstp compatible Multiple Spanning Tree Protocol
       Bridge Id       Priority  32768                Address  00:01:02:03:04:01                Max age is 20 sec, forward delay is 15 sec                Hello Time is 1 sec                Dynamic Path Cost is Disabled                Dynamic Path Cost Lag-Speed Change is Disabled

7. Reset the hello time.

       SEFOS(config)# no spanning-tree mst hello-time

8. View the output in switch 1.

       SEFOS# show spanning-tree
       Root Id     Priority   32768                Address    00:01:02:03:04:01                Cost       0                Port       0 [0]                This bridge is the root                Max age 20 Sec, forward delay 15 Sec                Hello Time 2 Sec

       MST00

       Spanning tree Protocol has been enabled

       MST00 is executing the mstp compatible Multiple Spanning Tree Protocol
       Bridge Id       Priority  32768                Address  00:01:02:03:04:01                Max age is 20 sec, forward delay is 15 sec                Hello Time is 2 sec                Dynamic Path Cost is Disabled                Dynamic Path Cost Lag-Speed Change is Disabled

9. Set the max age.

       SEFOS(config)# spanning-tree mst max-age 6

10. View the output in switch 1.

        SEFOS# sh spanning-tree
        Root Id         Priority   32768                Address    00:01:02:03:04:01                Cost       0                Port       0 [0]                This bridge is the root                Max age 6 Sec, forward delay 15 Sec                Hello Time 2 Sec

        MST00

        Spanning tree Protocol has been enabled

        MST00 is executing the mstp compatible Multiple Spanning Tree Protocol
        Bridge Id       Priority  32768                Address  00:01:02:03:04:01                Max age is 6 sec, forward delay is 15 sec                Hello Time is 2 sec                Dynamic Path Cost is Disabled                Dynamic Path Cost Lag-Speed Change is Disabled

11. Reset the max age.

        SEFOS(config)# no spanning-tree mst max-age

12. View the output in switch 1.

        SEFOS# sh spanning-tree
        Root Id         Priority   32768                Address    00:01:02:03:04:01                Cost       0                Port       0 [0]                This bridge is the root                Max age 20 Sec, forward delay 15 Sec                Hello Time 2 Sec

        MST00

        Spanning tree Protocol has been enabled

        MST00 is executing the mstp compatible Multiple Spanning Tree Protocol
        Bridge Id       Priority  32768                Address  00:01:02:03:04:01                Max age is 20 sec, forward delay is 15 sec                Hello Time is 2 sec                Dynamic Path Cost is Disabled                Dynamic Path Cost Lag-Speed Change is Disabled

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