14.
Multiple Spanning Tree Protocol (MSTP)
MN700004 Rev 01
179
device-name
(cfg protocol)#
mstp
4. Add VLANs to MTSIs 0, 1 and 2:
device-name
(cfg protocol mstp)#
instance 0 vlan 1-99,101-199,201-4094
device-name
(cfg protocol mstp)#
instance 1 vlan 100
device-name
(cfg protocol mstp)#
instance 2 vlan 200
After applying the configuration commands on all the switches as shown above and
connecting the switches as shown in Figure 14-3, the following information will be displayed
by the
show
mstp
command on each of the switches:
Displaying the Configuration on Switch 1:
device-name
#
show mstp
Multiple spanning trees = enabled
ProtocolSpecification = ieee8021s
Priority = 0
TimeSinceTopologyChange = 0 (Sec)
TopChanges = 6
CIST Root = 32768.00:A0:00:01:09:0B
CIST Port = 01/01/03
CIST Cost = 0
MaxAge = 20 (Sec)
HelloTime = 2 (Sec)
ForwardDelay = 15 (Sec)
BridgeMaxAge = 20 (Sec)
BridgeHelloTime = 2 (Sec)
BridgeForwardDelay = 15 (Sec)
ProtoMigratioDelay = 3 (Sec)
MaxHopCount = 40
TxHoldCount = 3
MST00
VLAN mapped = 1-99,101-199,201-4094
Regional Root = 32768.00:A0:00:01:09:0B
RemainingHopCount = 39
TopChanges = 6
==========================================================================
Port |Pri|Prt role|State|PCost |DCost |Designated bridge |DPrt
--------+---+--------+-----+---------+---------+------------------+-------
01/01/01 128 Designat frwrd 200000 0 32768.00A0120A0168 128.001
01/01/02 128 Designat frwrd 200000 0 32768.00A0120A0168 128.002
01/01/03 128 Root frwrd 200000 0 32768.00A00001090B 128.003
01/01/10 128 Designat frwrd 200000 0 32768.00A0120A0168 128.010
MST01
VLAN mapped = 100
Regional Root = This bridge is the root
RemainingHopCount = 40
TopChanges = 5
==========================================================================
Port |Pri|Prt role|State|PCost |DCost |Designated bridge |DPrt
--------+---+--------+-----+---------+---------+------------------+-------
01/01/01 128 Designat frwrd 200000 0 00000.00A0120A0168 128.001
01/01/02 128 Designat frwrd 200000 0 00000.00A0120A0168 128.002
01/01/03 128 Designat frwrd 200000 0 00000.00A0120A0168 128.003
01/01/10 128 Designat frwrd 200000 0 00000.00A0120A0168 128.010
MST02
VLAN mapped = 200
Regional Root = 00002.00:A0:00:01:09:0B
RemainingHopCount = 39