另外一个非常奇怪的的STP问题

woainia004 · 发表于 2013-5-29 17:06:32

下面是各个交换机的stp信息
R3(名称是核心A，其他信息vlan2 vlan3的根桥）：
VLAN2
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0001
         This bridge is the root
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 8192
         Address    cc0b.7644.0001
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD    0  8192 cc0b.7644.0001 128.4
FastEthernet0/4    128.5 128 19 FWD    0  8192 cc0b.7644.0001 128.5
Port-channel1       128.201  128 12 FWD    0  8192 cc0b.7644.0001 128.201


VLAN3
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0002
         This bridge is the root
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 8192
         Address    cc0b.7644.0002
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD    0  8192 cc0b.7644.0002 128.4
FastEthernet0/4    128.5 128 19 FWD    0  8192 cc0b.7644.0002 128.5
Port-channel1       128.201  128 12 FWD    0  8192 cc0b.7644.0002 128.201


VLAN4
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0003
         Cost       12
         Port       201 (Port-channel1)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 16384
         Address    cc0b.7644.0003
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD 12 16384 cc0b.7644.0003 128.4
FastEthernet0/4    128.5 128 19 FWD 12 16384 cc0b.7644.0003 128.5
Port-channel1       128.201  128 12 FWD    0  8192 cc08.7644.0003 128.201


VLAN5
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0004
         Cost       12
         Port       201 (Port-channel1)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 16384
         Address    cc0b.7644.0004
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD 12 16384 cc0b.7644.0004 128.4
FastEthernet0/4    128.5 128 19 FWD 12 16384 cc0b.7644.0004 128.5
Port-channel1       128.201  128 12 FWD    0  8192 cc08.7644.0004 128.201
R4（核心B，van4 vlan5根桥）：
VLAN2
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0001
         Cost       12
         Port       201 (Port-channel1)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 16384
         Address    cc08.7644.0001
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD 12 16384 cc08.7644.0001 128.4
FastEthernet0/4    128.5 128 19 FWD 12 16384 cc08.7644.0001 128.5
Port-channel1       128.201  128 12 FWD    0  8192 cc0b.7644.0001 128.201


VLAN3
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0002
         Cost       12
         Port       201 (Port-channel1)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 16384
         Address    cc08.7644.0002
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD 12 16384 cc08.7644.0002 128.4
FastEthernet0/4    128.5 128 19 FWD 12 16384 cc08.7644.0002 128.5
Port-channel1       128.201  128 12 FWD    0  8192 cc0b.7644.0002 128.201


VLAN4
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0003
         This bridge is the root
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 8192
         Address    cc08.7644.0003
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD    0  8192 cc08.7644.0003 128.4
FastEthernet0/4    128.5 128 19 FWD    0  8192 cc08.7644.0003 128.5
Port-channel1       128.201  128 12 FWD    0  8192 cc08.7644.0003 128.201


VLAN5
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0004
         This bridge is the root
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 8192
         Address    cc08.7644.0004
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD    0  8192 cc08.7644.0004 128.4
FastEthernet0/4    128.5 128 19 FWD    0  8192 cc08.7644.0004 128.5
Port-channel1       128.201  128 12 FWD    0  8192 cc08.7644.0004 128.201
R5（汇聚A）：

VLAN2
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0001
         Cost       19
         Port       4 (FastEthernet0/3)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32768
         Address    cc09.7644.0001
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD    0  8192 cc0b.7644.0001 128.4
FastEthernet0/4    128.5 128 19 BLK 12 16384 cc08.7644.0001 128.5
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc09.7644.0001 128.6

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc09.7644.0001 128.7

VLAN3
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0002
         Cost       19
         Port       4 (FastEthernet0/3)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
  Bridge ID  Priority 32768
         Address    cc09.7644.0002
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0
Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD    0  8192 cc0b.7644.0002 128.4
FastEthernet0/4    128.5 128 19 BLK 12 16384 cc08.7644.0002 128.5
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc09.7644.0002 128.6
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc09.7644.0002 128.7

VLAN4
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0003
         Cost       19
         Port       5 (FastEthernet0/4)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
  Bridge ID  Priority 32768
         Address    cc09.7644.0003
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0
Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 BLK 12 16384 cc0b.7644.0003 128.4
FastEthernet0/4    128.5 128 19 FWD    0  8192 cc08.7644.0003 128.5
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc09.7644.0003 128.6
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc09.7644.0003 128.7

VLAN5
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0004
         Cost       19
         Port       5 (FastEthernet0/4)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
  Bridge ID  Priority 32768
         Address    cc09.7644.0004
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0
Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 BLK 12 16384 cc0b.7644.0004 128.4
FastEthernet0/4    128.5 128 19 FWD    0  8192 cc08.7644.0004 128.5
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc09.7644.0004 128.6
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc09.7644.0004 128.7
R6（汇聚B）：
VLAN2
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0001
         Cost       19
         Port       5 (FastEthernet0/4)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32768
         Address    cc0a.7644.0001
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 BLK 12 16384 cc08.7644.0001 128.4
FastEthernet0/4    128.5 128 19 FWD    0  8192 cc0b.7644.0001 128.5
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc0a.7644.0001 128.6
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc0a.7644.0001 128.7


VLAN3
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0002
         Cost       19
         Port       5 (FastEthernet0/4)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32768
         Address    cc0a.7644.0002
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 BLK 12 16384 cc08.7644.0002 128.4
FastEthernet0/4    128.5 128 19 FWD    0  8192 cc0b.7644.0002 128.5
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc0a.7644.0002 128.6
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc0a.7644.0002 128.7


VLAN4
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0003
         Cost       19
         Port       4 (FastEthernet0/3)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32768
         Address    cc0a.7644.0003
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD    0  8192 cc08.7644.0003 128.4
FastEthernet0/4    128.5 128 19 BLK 12 16384 cc0b.7644.0003 128.5
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc0a.7644.0003 128.6
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc0a.7644.0003 128.7


VLAN5
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0004
         Cost       19
         Port       4 (FastEthernet0/3)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32768
         Address    cc0a.7644.0004
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/3    128.4 128 19 FWD    0  8192 cc08.7644.0004 128.4
FastEthernet0/4    128.5 128 19 BLK 12 16384 cc0b.7644.0004 128.5
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc0a.7644.0004 128.6
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc0a.7644.0004 128.7
R7(接入A）：
VLAN2
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0001
         Cost       38
         Port       6 (FastEthernet0/5)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32768
         Address    cc00.8eec.0001
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc09.7644.0001 128.6
FastEthernet0/6    128.7 128 19 BLK 19 32768 cc0a.7644.0001 128.7
FastEthernet0/7    128.8 128 19 FWD 38 32768 cc00.8eec.0001 128.8


VLAN3
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0002
         Cost       38
         Port       6 (FastEthernet0/5)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32768
         Address    cc00.8eec.0002
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc09.7644.0002 128.6
FastEthernet0/6    128.7 128 19 BLK 19 32768 cc0a.7644.0002 128.7


VLAN4
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0003
         Cost       38
         Port       6 (FastEthernet0/5)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32768
         Address    cc00.8eec.0003
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc09.7644.0003 128.6
FastEthernet0/6    128.7 128 19 BLK 19 32768 cc0a.7644.0003 128.7
FastEthernet0/8    128.9 128 19 FWD 38 32768 cc00.8eec.0003 128.9


VLAN5
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0004
         Cost       38
         Port       6 (FastEthernet0/5)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority 32768
         Address    cc00.8eec.0004
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0

Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/5    128.6 128 19 FWD 19 32768 cc09.7644.0004 128.6
FastEthernet0/6    128.7 128 19 BLK 19 32768 cc0a.7644.0004 128.7
R8（接入B）：
VLAN2
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0001
         Cost       38
         Port       7 (FastEthernet0/6)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
  Bridge ID  Priority 32768
         Address    cc01.8eec.0001
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0
Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/5    128.6 128 19 BLK 19 32768 cc0a.7644.0001 128.6
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc09.7644.0001 128.7

VLAN3
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc0b.7644.0002
         Cost       38
         Port       7 (FastEthernet0/6)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
  Bridge ID  Priority 32768
         Address    cc01.8eec.0002
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0
Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/5    128.6 128 19 BLK 19 32768 cc0a.7644.0002 128.6
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc09.7644.0002 128.7
FastEthernet0/7    128.8 128 19 FWD 38 32768 cc01.8eec.0002 128.8

VLAN4
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0003
         Cost       38
         Port       7 (FastEthernet0/6)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
  Bridge ID  Priority 32768
         Address    cc01.8eec.0003
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0
Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/5    128.6 128 19 BLK 19 32768 cc0a.7644.0003 128.6
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc09.7644.0003 128.7

VLAN5
  Spanning tree enabled protocol ieee
  Root ID Priority 8192
         Address    cc08.7644.0004
         Cost       38
         Port       7 (FastEthernet0/6)
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
  Bridge ID  Priority 32768
         Address    cc01.8eec.0004
         Hello Time 2 sec  Max Age 20 sec  Forward Delay 15 sec
         Aging Time 0
Interface                                  Designated
Name                Port ID Prio Cost  Sts Cost  Bridge ID          Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
FastEthernet0/5    128.6 128 19 BLK 19 32768 cc0a.7644.0004 128.6
FastEthernet0/6    128.7 128 19 FWD 19 32768 cc09.7644.0004 128.7
FastEthernet0/8    128.9 128 19 FWD 38 32768 cc01.8eec.0004 128.9
问题：R3-R7的生成树都是正常的，，就是R8不对，在R8上van4 vlan5应该阻塞F0/6才对吧，，，，
大家要什么配置可以跟帖我帖上来！！！

woainia004 · 发表于 2013-5-29 19:13:12

来个高手分析分析呢

ccwmy@sohu.com · 发表于 2013-5-30 10:26:05

不懂，表示

王晓强 · 发表于 2013-5-30 15:04:02

学会问问题，真的是一门学问。

好好整理下。注意篇幅和你的分析和你的困惑。截图到关键信息即可。
帮助回答问题者降低时间成本，提高效率。

学会描述和表达问题，也是一项重要的工程师技能。

小小媄oC · 发表于 2013-5-30 22:37:04

太长太拖。

zhangaxyoyo · 发表于 2013-5-31 16:06:48

王晓强发表于 2013-5-30 15:04
学会问问题，真的是一门学问。

好好整理下。注意篇幅和你的分析和你的困惑。截图到关键信息即可。

支持强哥说的话,学会表达及描述,是一门很重要的工作技能.所以希望LZ你把重点给呈现出来,这样会减少很多不必要的时间.呵呵要不这样看完头都大了.

zhuchen89 · 发表于 2013-5-31 16:57:24

R8
选举根端口，到达根桥cost一样，然后上一跳设备的优先级，相同，MAC地址，F0/6连接上一跳交换机MAC地址小，F0/6成为根端口，然后选举指定端口,显然R6的F0/5 cost小，R8的F0/5 block

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[讨论/求助] 另外一个非常奇怪的的STP问题

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