Dell Force10 S4810P Configuration Manual page 708

Figure 32-15. Sample Output for
FTOS#show run spanning-tree mstp
!
protocol spanning-tree mstp
name Tahiti
revision 123
MSTI 1 VLAN 100
MSTI 2 VLAN 200,300
Figure 32-16. Displaying BPDUs and Events - Debug Log of Successful MSTP Configuration
FTOS#debug spanning-tree mstp bpdu
MSTP debug bpdu is ON
FTOS#
4w0d4h :
ProtId: 0, Ver: 3, Bpdu Type: MSTP, Flags 0x6e
CIST Root Bridge Id: 32768:0001.e806.953e, Ext Path Cost: 0
Regional Bridge Id: 32768:0001.e806.953e, CIST Port Id: 128:470
Msg Age: 0, Max Age: 20, Hello: 2, Fwd Delay: 15, Ver1 Len: 0, Ver3 Len: 96
Name: Tahiti, Rev: 123,
Rem Hops: 20, Bridge Id: 32768:0001.e806.953e
4w0d4h : INST 1: Flags: 0x6e, Reg Root: 32768:0001.e806.953e, Int Root Cost: 0
INST 2: Flags: 0x6e, Reg Root: 32768:0001.e806.953e, Int Root Cost: 0
4w0d4h :
ProtId: 0, Ver: 3, Bpdu Type: MSTP,
CIST Root Bridge Id: 32768:0001.e806.953e, Ext Path Cost: 0
Regional Bridge Id: 32768:0001.e806.953e, CIST Port Id: 128:470
Msg Age: 0, Max Age: 20, Hello: 2, Fwd Delay: 15, Ver1 Len: 0, Ver3 Len: 96
Name: Tahiti, Rev:
Rem Hops: 19, Bridge Id: 32768:0001.e8d5.cbbd
4w0d4h :
INST 2: Flags: 0x78, Reg Root: 32768:0001.e806.953e, Int Root Cost: 0
MSTP Instance
MSTP Region name
and revision
Figure 32-17. Displaying BPDUs and Events - Debug Log of Unsuccessful MSTP Configuration
4w0d4h : MSTP: Received BPDU on Gi 2/21 :
ProtId: 0, Ver: 3, Bpdu Type: MSTP, Flags
CIST Root Bridge Id: 32768:0001.e806.953e, Ext Path Cost: 0
Regional Bridge Id: 32768:0001.e806.953e, CIST Port Id: 128:470
Msg Age: 0, Max Age: 20, Hello: 2, Fwd Delay: 15, Ver1 Len: 0, Ver
Name: Tahiti, Rev: 123, Int Root Path Cost: 0
Rem Hops: 20, Bridge Id: 32768:0001.e8d5.cbbd
4w0d4h : INST 1: Flags: 0x70, Reg Root: 32768:0001.e8d5.cbbd, Int
INST 2: Flags: 0x70, Reg Root: 32768:0001.e8d5.cbbd, Int Root Cost
708
| Multiple Spanning Tree Protocol (MSTP)
MSTP: Sending BPDU on Gi 2/21 :
Int Root Path Cost: 0
Brg/Port Prio: 32768/128, Rem Hops: 20
Brg/Port Prio: 32768/128, Rem Hops: 20
MSTP: Received BPDU on Gi 2/21 :
123, Int Root Path Cost: 0
INST 1: Flags: 0x78, Reg Root: 32768:0001.e806.953e, Int Root Cost: 0
Brg/Port Prio: 32768/128, Rem Hops: 19
Brg/Port Prio: 32768/128, Rem Hops: 19
Brg/Port Prio: 32768/128, Rem Hops: 20
Brg/Port Prio: 32768/128, Rem Hops: 20
show running-configuration spanning-tree mstp
Flags 0x78Same Region
0x78Different Region
command
Indicates MSTP
routers are in the
(single) region
Indicates MSTP
routers are in
different regions and
are not communicating
with each other