Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 442
Displaying BPDUs and Events - Debug Log of Successful MSTP Configuration
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www.dell.com | support.dell.com Figure 22-15. Sample Output for show running-configuration spanning-tree mstp command Force10#show run spanning-tree mstp ! protocol spanning-tree mstp name Tahiti revision 123 MSTI 1 VLAN 100 MSTI 2 VLAN 200,300 Figure 22-16. Displaying BPDUs and Events - Debug Log of Successful MSTP Configuration Force10#debug spanning-tree mstp bpdu MSTP debug bpdu is ON Force10# 4w0d4h : MSTP: Sending BPDU on Gi 2/21 : 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, Int Root Path Cost: 0 Rem Hops: 20, Bridge Id: 32768:0001.e806.953e 4w0d4h : INST 1: Flags: 0x6e, Reg Root: 32768:0001.e806.953e, Int Root Cost: 0 Brg/Port Prio: 32768/128, Rem Hops: 20 INST 2: Flags: 0x6e, Reg Root: 32768:0001.e806.953e, Int Root Cost: 0 Brg/Port Prio: 32768/128, Rem Hops: 20 4w0d4h : MSTP: Received BPDU on Gi 2/21 : ProtId: 0, Ver: 3, Bpdu Type: MSTP, Flags 0x78Same Region CIST Root Bridge Id: 32768:0001.e806.953e, Ext Path Cost: 0 Regional Bridge Id: 32768:0001.e806.953e, CIST Port Id: 128:470 Indicates MSTP routers are in the (single) region Msg Age: 0, Max Age: 20, Hello: 2, Fwd Delay: 15, Ver1 Len: 0, Ver3 Len: 96 Name: Tahiti, Rev: 123, Int Root Path Cost: 0 Rem Hops: 19, Bridge Id: 32768:0001.e8d5.cbbd 4w0d4h : INST 1: Flags: 0x78, Reg Root: 32768:0001.e806.953e, Int Root Cost: 0 Brg/Port Prio: 32768/128, Rem Hops: 19 INST 2: Flags: 0x78, Reg Root: 32768:0001.e806.953e, Int Root Cost: 0 Brg/Port Prio: 32768/128, Rem Hops: 19 MSTP Instance MSTP Region name and revision Figure 22-17. 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 0x78Different Region 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 Brg/Port Prio: 32768/128, Rem Hops: 20 INST 2: Flags: 0x70, Reg Root: 32768:0001.e8d5.cbbd, Int Root Cost Brg/Port Prio: 32768/128, Rem Hops: 20 Indicates MSTP routers are in different regions and are not communicating with each other 442 | Multiple Spanning Tree Protocol
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