{"id":944,"date":"2011-06-07T22:34:00","date_gmt":"2011-06-07T14:34:00","guid":{"rendered":"http:\/\/note.systw.net\/note\/?p=944"},"modified":"2023-11-07T22:46:54","modified_gmt":"2023-11-07T14:46:54","slug":"cisco-stp","status":"publish","type":"post","link":"https:\/\/systw.net\/note\/archives\/944","title":{"rendered":"Cisco STP"},"content":{"rendered":"\n

\u555f\u7528stp
(config)# spanning-tree vlan < vlan-id><\/strong><\/p>\n\n\n\n

\u555f\u7528\u4ecb\u9762\u7684stp
(config-if)# spanning-tree vlan < vlan-id> <\/strong><\/p>\n\n\n\n

\u8a2d\u5b9astp mode
(config)#spanning-tree mode < mode><\/strong>
mode\u6709mst,pvst,rapid-pvst\u53ef\u9078
ps:\u82e5\u8981\u7528802.1w\u7684rstp\u5247mode\u9078rapid-pvst<\/p>\n\n\n\n

\u555f\u7528802.1t\u4e4bpriority\u683c\u5f0f
(config)# spanning-tree extend system-id <\/strong><\/p>\n\n\n\n

………. <\/p>\n\n\n\n

\u8a2d\u8a08swtich\u7684stp\u67b6\u69cb<\/strong>
\u4e3b\u8981\u53c3\u6578\u6709\u4ee5\u4e0b 
switch priority,\u6539\u8b8aswitch id,\u8abf\u6574root bridge 
path cost,\u8abf\u6574root port 
port priority,\u6539\u8b8aport id,\u8abf\u6574desigenated port
timer,\u6539\u8b8aconvergence\u901f\u5ea6  <\/p>\n\n\n\n

\u8abf\u6574priority\u4ee5\u6539\u8b8abridge id 
(config)#spanning-tree vlan < vlan-list > priority < bridge-priority><\/strong>
bridge-priority,\u8a2d\u6700\u4f4e\u53ef\u4f7f\u8a72switch\u5728\u6b64vlan\u6210\u70baroot bridge
\u3000802.1d\u683c\u5f0f:\u53ef\u8a2d\u7bc4\u570d\u70ba0-65535,\u9810\u8a2d32768 
\u3000802.1t\u683c\u5f0f:\u53ef\u8a2d\u7bc4\u570d\u70ba0-61440(\u9700\u4ee54096\u500d\u6578\u8a2d\u5b9a),\u9810\u8a2d=32768+\u76ee\u524dvlan
ps:bridge id=priority+mac 
ex
\u5728802.1d\u683c\u5f0f\u4e0b,\u6307\u5b9avlan1\u7684\u512a\u5148\u6b0a\u70ba4096
(config)#spanning-tree vlan 1 priority 4096 
# show spanning-tree vlan 1
VLAN0001
\u3000Spanning tree enabled protocol ieee
\u3000Root ID Priority 4096
[output omitted]
\u3000Bridge ID Priority 4096<\/strong>
[output omitted]
ex:
\u5728802.1t\u683c\u5f0f\u4e0b,\u6307\u5b9a\u8a72switch\u5728vlan1\u7684\u512a\u5148\u6b0a\u70ba0(\u5f37\u5236\u70baroot bridge)
(config)#spanning-tree vlan 1 priority 0
# show spanning-tree vlan 1
VLAN0001
\u3000Spanning tree enabled protocol ieee
\u3000Root ID Priority 1
[output omitted]
\u3000Bridge ID Priority 1 (priority 0 sys-id-ext 1)<\/strong>
[output omitted] <\/p>\n\n\n\n

\u6307\u5b9a\u4ecb\u9762\u7684path cost
(config-if)# spanning-tree [vlan < vlan-id >] cost < cost><\/strong>
\u5404\u53c3\u6578\u8aaa\u660e\u5982\u4e0b:
< cost > \u53ef\u8a2d\u7bc4\u570d\u70ba0-65535,\u9810\u8a2d\u503c\u4f9d\u4e0d\u540c\u983b\u5bec\u6703\u4e0d\u4e00\u6a23
[vlan < vlan-id >] \u53ea\u505a\u7528\u5728\u6307\u5b9avlan 
ex:
\u6307\u5b9a\u4ecb\u9762gi0\/1\u7684path cost\u53ea\u5728vlan 10\u70ba2  
(config-if)# spanning-tree vlan 10 cost 2
# show spanning-tree interface gigabitEthernet 0\/1
Vlan\u3000\u3000\u3000\u3000,Role\u3000,Sts \u3000,Cost\u3000,Prio.Nbr\u3000,Type
VLAN0010\u3000,Desg\u3000,FWD\u3000,2 \u3000\u3000,128.1\u3000\u3000,P2p<\/p>\n\n\n\n

\u8a2d\u5b9apriority\u4ee5\u6539\u8b8aport id
(config-if)# spanning-tree [vlan <\/strong>] port-priority < port-priority><\/strong>
\u5404\u53c3\u6578\u8aaa\u660e\u5982\u4e0b
port-priority,\u53ef\u8a2d\u7bc4\u570d\u70ba0-255,\u9810\u8a2d\u70ba128
[vlan < vlan-list >] \u53ea\u505a\u7528\u5728\u6307\u5b9a\u7684vlan
ps:port id=priority+port sn
ps:etherchannel,port-channel\u7684port id\u9810\u8a2d\u6703\u6bd4\u8f03\u9ad8
ex:
\u8a2d\u5b9a\u8a72\u4ecb\u9762\u5728vlan10,100\u7684priority\u70ba64
(config-if)# spanning-tree vlan 10,100 port-priority 64
# show spanning-tree interface gigabitEthernet 0\/1
Vlan\u3000\u3000\u3000\u3000,Role\u3000,Sts \u3000,Cost\u3000,Prio.Nbr\u3000,Type
VLAN0010\u3000,Desg\u3000,FWD\u3000,2 \u3000\u3000,64.1\u3000\u3000,P2p
VLAN0100\u3000,Desg\u3000,FWD\u3000,2 \u3000\u3000,64.1\u3000\u3000,P2p<\/p>\n\n\n\n

\u8a2d\u5b9atimer(\u53ea\u80fd\u5728root bridge\u4e0a\u8a2d\u5b9a)
(config)# spanning-tree [vlan < vlan-id >] < timer > < sec><\/strong>
\u5404\u53c3\u6578\u8aaa\u660e\u5982\u4e0b
timer\u6709hello-time(\u53ef\u8a2d\u7bc4\u570d\u70ba1-10),forward-time(\u53ef\u8a2d\u7bc4\u570d\u70ba4-30),max-age(\u53ef\u8a2d\u7bc4\u570d\u70ba6-40)
[vlan < vlan-list>] \u53ea\u505a\u7528\u5728\u6307\u5b9a\u7684vlan  
ps:
\u82e5other switch\u548croot switch\u4e4bhello timer\u4e0d\u540c,\u5247other switch\u6703\u81ea\u52d5\u548croot switch\u4e00\u6a23<\/p>\n\n\n\n

……… <\/p>\n\n\n\n

\u7528macro\u81ea\u52d5\u8a2d\u5b9astp\u53c3\u6578 
(config)#spanning-tree vlan < vlan-list > root < primary | secondary > [diameter < value> hello-timer < sec >]<\/strong>
\u5404\u53c3\u6578\u8aaa\u660e\u5982\u4e0b:
primary<\/strong>,\u6307\u5b9a\u8a72switch\u70baroot bridge,\u6703\u5c07priority\u81ea\u52d5\u8a2d\u70ba24576,\u82e5\u9084\u7121\u6cd5\u6210\u70baroot bridge\u5247\u5728\u81ea\u52d5\u8a2d\u62104096 
secondary<\/strong>,\u6307\u5b9a\u70ba\u8a72switch\u70ba\u5099\u63f4root bridge,\u6703\u5c07priority\u8a2d\u70ba28672
ps:\u82e5\u76ee\u524droot bridge\u7684priority\u4f4e\u65bc4096,\u5247\u7121\u6cd5\u81ea\u52d5\u8a2d\u57284096\u4ee5\u5167,
ps:\u82e5\u8981\u89e3\u6c7a4096\u554f\u984c,\u5247\u9700\u7528spanning-tree vlan < vlan-list> priority 0  
diameter<\/strong>,\u53ef\u8a2d\u7bc4\u570d\u70ba2-7,\u7528\u4f86\u6307\u5b9a\u5f9eroot bridge\u5230\u6700\u5f8c\u4e00\u500bdevice\u7684lan segment\u6578\u91cf
hello-timer<\/strong>,\u6307\u5b9ahello-timer\u7684\u79d2\u6578,
ps:diameter,hello-timer\u6703\u5f71\u97ffmax-aging,forward delay\u7684\u503c  
ps:\u6b64\u6307\u4ee4\u53ef\u80fd\u6703\u6539\u8b8a\u7684\u503c\u6709,bridge priority,max aging,hello time,forward delay 
ex:
\u8a2d\u5b9a\u8a72switch\u5728vlan100\u70baroot bridge,\u4e14\u6700\u591a3\u500blan segment,\u4e26\u5e0c\u671bhello-timer\u70ba1\u79d2
(config)# spanning-tree vlan 100 root primary diameter 3 hello-time 1
\u6703\u4f7f\u5404timer\u503c\u6539\u8b8a\u70baHelloTime 1sec,MaxAge 7sec,ForwardDelay 5sec
ps:\u8a72\u6307\u4ee4\u70ba\u5176\u4ed6\u6307\u4ee4\u7684\u96c6\u5408,\u56e0\u6b64\u8a72\u6307\u4ee4\u4e0d\u6703\u51fa\u73fe\u5728switch\u7d44\u614b\u4e2d<\/p>\n\n\n\n

ps
(config)#spanning-tree ?
backbonefast Enable BackboneFast Feature
portfast Spanning tree portfast options
uplinkfast Enable UplinkFast Feature
vlan VLAN Switch Spanning Tree<\/p>\n\n\n\n

…………………. <\/p>\n\n\n\n

ps:\u82e5\u72c0\u614b\u70bablock,listen,learn,\u5247port\u4e0a\u7684\u71c8\u865f\u53ef\u80fd\u662flambe\u8272,\u8b8a\u70baforward\u72c0\u614b\u6642\u624d\u6703\u6210\u70bagreen\u8272 <\/p>\n\n\n\n

\u986f\u793astp\u8cc7\u8a0a
1900#show spantree
2950#show spanning-tree [interface < interface >] [detail]<\/strong>
\u986f\u793a\u5168\u90e8stp\u53c3\u6578,port\u8cc7\u8a0a\u6982\u8ff0 
ps:
\u4ee5show spanning-tree\u70ba\u4f8b,
\u756b\u9762\u5927\u81f4\u5982\u4e0b
VLAN001
\u3000Spanning tree enabled protocol ieee
\u3000Root ID Priority 32768
\u3000\u3000Address 000C.1000.4605
\u3000\u3000This bridge is the root \/\/\u6b64\u8a2d\u5099\u662froot bridge
\u3000\u3000Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec \/\/bpdu hello time\u6bcf2\u79d2\u9001\u4e00\u6b21
\u3000Bridge ID Priority 32768 \/\/\u88dd\u7f6e\u512a\u5148\u6b0a\uff0c\u9810\u8a2d\u662f32768
\u3000\u3000Address 000C.1000.4605
\u3000\u3000Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
\u3000\u3000Aging Time 300
Interface Port ID \u3000Designated Port ID
Name \u3000Prio.Nbr \u3000Cost Sts Cost Bridge ID Prio.Nbr
—————- ——– ——— — ——— ——————– ——–
Fa0\/1\u300032768.1\u3000 0 FWD\u3000 0 32768 000C.1000.4605 0.1 \/\/fa0\/1port\u70baforward\u72c0\u614b
Fa0\/2\u300032768.2\u3000 0 BLK\u3000 0 32768 000C.1000.4605 0.2 \/\/fa0\/2port\u70bablock\u72c0\u614b
Fa0\/3\u300032768.3\u3000 0 FWD\u3000 0 32768 000C.1000.4605 0.3
[output omitted]
1
[detail]<\/strong>:\u986f\u793a\u6240\u6709vlan\u548cport\u7684\u8a73\u7d30\u8cc7\u8a0a
ps:
\u4ee5show spanning-tree detail\u70ba\u4f8b,
\u756b\u9762\u5927\u81f4\u5982\u4e0b 
Spanning tree 1 is executing the IEEE compatible Spanning Tree protocol
\u3000Bridge Identifier has priority 32768, address 0001.42ac.5400
\u3000Configured hello time 2, max age 20, forward delay 15
\u3000We are the root of the spanning tree \/\/\u6b64\u8a2d\u5099\u662froot bridge
\u3000Topology change flag not set, detected flag not set, changes 1
\u3000Times: hold 1, topology change 35, notification 2
\u3000\u3000hello 2, max age 20, forward delay 15
\u3000Timers: hello 0, topology change 0, notification 0
Interface Fa0\/1 (port 13) in Spanning tree 1 is BLOCKING \/\/fa0\/1port\u70bablocking\u72c0\u614b
\u3000Port path cost 100, Port priority 128<\/strong>
\u3000Designated root has priority 32768,<\/strong> address 0001.42ac.5400
\u3000Designated bridge has priority 32768,<\/strong> address 0001.42ac.5400
\u3000Designated port is 13<\/strong>, path cost 0
\u3000Timers: message age 0, forward delay 0, hold 0
\u3000BPDU: sent 0, received 0
Interface Fa0\/2 (port 14) in Spanning tree 1 is FORWARDING \/\/fa0\/2port\u70baforward\u72c0\u614b
[output omitted]\u3000
ps:
#show spanning-tree interface
\u986f\u793astp\u5728\u8a72\u4ecb\u9762\u7684\u72c0\u614b\u3000
\u756b\u9762\u5927\u81f4\u5982\u4e0b
Vlan\u3000\u3000\u3000,Role\u3000,Sts\u3000,Cost\u3000,Prio.Nbr\u3000,Type
VLAN003\u3000,Desg\u3000,FWD\u3000,4\u3000\u3000,128.393\u3000\u3000,P2p<\/p>\n\n\n\n

#show spanning-tree [vlan < vlan-id>] < root | bridge | summary><\/strong>
1
< root >:<\/strong>\u53ef\u986f\u793aroot bridge\u76f8\u95dc\u8cc7\u8a0a\u3000
ps:
\u4ee5show spanning-tree root\u70ba\u4f8b,
\u756b\u9762\u5927\u81f4\u5982\u4e0b:
Vlan\u3000\u3000\u3000\u3000,Root ID\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000,RootCost,HelloTime,MaxAge,FwdDly,RootPort
VLAN0001\u3000,32768 0006.53e0.e380\u3000,4\u3000\u3000\u3000\u3000,2\u3000\u3000\u3000\u3000\u3000,20\u3000\u3000\u3000,15\u3000\u3000,Gi4\/5
VLAN0002\u3000,32768 001b.0d65.4802\u3000,0\u3000\u3000\u3000\u3000,2\u3000\u3000\u3000\u3000\u3000,20\u3000\u3000\u3000,15
[output omitted]
2
< bridge >:<\/strong>\u53ef\u986f\u793a\u5176\u4ed6bridge\u7684\u76f8\u95dc\u8cc7\u8a0a
ps:
\u4ee5show spanning-tree bridge\u70ba\u4f8b,
\u756b\u9762\u5927\u81f4\u5982\u4e0b:
Vlan\u3000\u3000\u3000\u3000,Bridge ID\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000,HelloTime,MaxAge,FwdDly,Protocol
VLAN0001\u3000,32768 001b.0d65.4801\u3000,2\u3000\u3000\u3000\u3000,20\u3000\u3000\u3000,15\u3000\u3000\u3000,ieee
VLAN0002\u3000,32768 001b.0d65.4802\u3000,2\u3000\u3000\u3000\u3000,20\u3000\u3000\u3000,15\u3000\u3000\u3000,ieee
[output omitted]
3
< summary >:<\/strong>\u53ef\u986f\u793a\u6240\u6709stp\u7684port\u72c0\u614b\u7d71\u8a08
ps:
\u4ee5show spanning-tree summary\u70ba\u4f8b,
\u756b\u9762\u5927\u81f4\u5982\u4e0b
Switch is in pvst mode
Root bridge for: VLAN0002 
EtherChannel misconfig guard is enabled
Extended system ID is disabled
Portfast Default is disabled
PortFast BPDU Guard Default is disabled
Portfast BPDU Filter Default is disabled
Loopguard Default is disabled
UplinkFast is disabled
BackboneFast is disabled
Pathcost method used is short
Name \u3000\u3000\u3000Blocking,Listening,Learning,Forwarding,STP Active
VLAN0001\u3000,0\u3000\u3000\u3000\u3000,0\u3000\u3000\u3000\u3000,0\u3000\u3000\u3000\u3000,14\u3000\u3000\u3000\u3000,14
VLAN0002\u3000,0\u3000\u3000\u3000\u3000,0\u3000\u3000\u3000\u3000,0\u3000\u3000\u3000\u3000,14\u3000\u3000\u3000\u3000,14
[output omitted] \u3000<\/p>\n","protected":false},"excerpt":{"rendered":"

\u555f\u7528stp(config)# spanning-tree v …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[34],"tags":[],"class_list":["post-944","post","type-post","status-publish","format-standard","hentry","category-cisco-layer2"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/944","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/comments?post=944"}],"version-history":[{"count":0,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/944\/revisions"}],"wp:attachment":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/media?parent=944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/categories?post=944"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/tags?post=944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}