Hello everyone
On task 3.7 and 3.8 in Lab 3 from WB1 there are a few errors -
- In the initial config, Gi0/1 on Cat1-MST is active (unshut). In the DSG,
it is shutdown. For the configuration task to work as detailed in the DSG,
Gi0/1 must be set to shutdown.
- Simply shutting down Fa0/22 on Cat3-MST as detailed in the DSG won't
result in the correct output as the DSG dictates. In the DSG, Fa0/24 becomes
the root port because of a tiered cost of 20000. But, in reality Fa0/21
would become the new root port because nowhere in the Lab does it say to
configure a cost of 20000 on fa0/21 on Cat1-MST. But if you take a look at
the output graphics from the DSG, Fa0/21 does have a cost of 20000, so the
DSG obviously has some config that the default initial config does not.
Cat1-MST(config-if-range)#do sh span
MST0
Spanning tree enabled protocol mstp
Root ID Priority 24576
Address 001b.d4d3.0b00
Cost 0
Port 21 (FastEthernet0/21)
Hello Time 3 sec Max Age 15 sec Forward Delay 15 sec
Bridge ID Priority 32768 (priority 32768 sys-id-ext 0)
Address 0012.01b0.f780
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- --------
--------------------------------
Fa0/1 Desg FWD 200000 128.1 P2p
Fa0/4 Desg FWD 200000 128.4 P2p
Fa0/5 Desg FWD 200000 128.5 P2p
Fa0/11 Desg FWD 2000000 128.11 Shr
Fa0/21 Root FWD 200000 128.21 P2p
Fa0/23 Altn BLK 200000 128.23 P2p
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- --------
--------------------------------
Fa0/24 Altn BLK 200000 128.24 P2p
Gi0/2 Desg FWD 20000 128.26 P2p
So, if I set the cost to 20000 on fa0/24 on Cat1-MST, then it will work as
shown in the DSG:
Cat1-MST(config-if-range)#int fa0/24
Cat1-MST(config-if)#spanning-tree mst 0 cost 20000
Cat1-MST(config-if)#do sh spann
MST0
Spanning tree enabled protocol mstp
Root ID Priority 24576
Address 001b.d4d3.0b00
Cost 0
Port 24 (FastEthernet0/24)
Hello Time 3 sec Max Age 15 sec Forward Delay 15 sec
Bridge ID Priority 32768 (priority 32768 sys-id-ext 0)
Address 0012.01b0.f780
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- --------
--------------------------------
Fa0/1 Desg FWD 200000 128.1 P2p
Fa0/4 Desg FWD 200000 128.4 P2p
Fa0/5 Desg FWD 200000 128.5 P2p
Fa0/11 Desg FWD 2000000 128.11 Shr
Fa0/21 Altn BLK 200000 128.21 P2p
Fa0/23 Altn BLK 200000 128.23 P2p
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- --------
--------------------------------
Fa0/24 Root FWD 20000 128.24 P2p
Gi0/2 Desg FWD 20000 128.26 P2p
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