14.
Multiple Spanning Tree Protocol (MSTP)
MN700004 Rev 01
183
Figure 14-4 Link Failure Between Two Switches
In this case, the
show mstp
command will show the following.
On Switch 2 and Switch 4:
The output displayed by the
show mstp
command will not be affected by the change.
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
--------+---+--------+-----+---------+---------+------------------+-------
01/01/02 128 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