vlan和生成樹協(xié)議講義-資料下載頁(yè)
2025-02-16 01:34本頁(yè)面
【正文】 gtree uplinkfast ? Displays UplinkFast configuration information 169。 2023 Cisco Systems, Inc. All rights reserved. 3 BackboneFast（主干快速） 169。 2023 Cisco Systems, Inc. All rights reserved. 開(kāi)啟和檢查 BackboneFast Switchshow spanningtree backbonefast BackboneFast is enabled BackboneFast statistics Number of transition via backboneFast (all VLANs) : 0 Number of inferior BPDUs received (all VLANs) : 0 Number of RLQ request PDUs received (all VLANs) : 0 Number of RLQ response PDUs received (all VLANs) : 0 Number of RLQ request PDUs sent (all VLANs) : 0 Number of RLQ response PDUs sent (all VLANs) : 0 Switch(config)spanningtree backbonefast ? Enables BackboneFast Switchshow spanningtree backbonefast ? Displays BackboneFast configuration information 169。 2023 Cisco Systems, Inc. All rights reserved. 169。 2023 Cisco Systems, Inc. All rights r se ve . 07 Configuring Catalyst Switch Operations RSTP（快速生成樹協(xié)議） 169。 2023 Cisco Systems, Inc. All rights reserved. 1 RSTP（ Rapid Spanning Tree Protocol， 快速生成樹協(xié)議） 概述 169。 2023 Cisco Systems, Inc. All rights reserved. 2 RSTP 端口狀態(tài) 169。 2023 Cisco Systems, Inc. All rights reserved. 3 RSTP端口角色 169。 2023 Cisco Systems, Inc. All rights reserved. 4 Edge Ports（邊緣端口） ? 永遠(yuǎn)不會(huì)是交換機(jī)連接到它； ? 馬上轉(zhuǎn)變成轉(zhuǎn)發(fā)狀態(tài)； ? 功能類似于 PortFast ? 通過(guò) spanningtree portfast命令配置 169。 2023 Cisco Systems, Inc. All rights reserved. 5 RSTP鏈路類型 ? RSTP的鏈路類型分為共享鏈路和點(diǎn)到點(diǎn)鏈路； ? 鏈路類型是從端口的雙工模式（ duplex mode）自動(dòng)獲取的。 ? 默認(rèn)時(shí)，操作在全雙工模式的端口被認(rèn)為是點(diǎn)對(duì)點(diǎn)的，而操作在半雙工模式的端口被認(rèn)為是共享端口。 169。 2023 Cisco Systems, Inc. All rights reserved. 6 RSTP BPDU中的 Flag字段 169。 2023 Cisco Systems, Inc. All rights reserved. 7 PVRST命令 Cisco不支持純粹的 RSTP,支持 PVRST（ Per VLAN RapidSpanningtree，每 VLAN快速生成樹） Configuring ? spanningtree mode rapidpvst Verifying ? show spanningtree vlan 101 Debugging ? debug spanningtree 169。 2023 Cisco Systems, Inc. All rights reserved. 如何實(shí)現(xiàn) PVRST 169。 2023 Cisco Systems, Inc. All rights reserved. 檢查 PVRST Display spanning tree mode is set to PVRST. Switch show spanningtree vlan 30 VLAN0030 Spanning tree enabled protocol rstp Root ID Priority 24606 Address This bridge is the root Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 24606 (priority 24576 sysidext 30) Address Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 Interface Role Sts Cost Type Gi1/1 Desg FWD 4 P2p Gi1/2 Desg FWD 4 P2p Gi5/1 Desg FWD 4 P2p 169。 2023 Cisco Systems, Inc. All rights reserved. 配置根網(wǎng)橋 Switch(config)spanningtree vlan 1 root primary ? 強(qiáng)制交換機(jī)成為根網(wǎng)橋 Switch(config)spanningtree vlan 1 root secondary ? 將交換機(jī)配置成備份根網(wǎng)橋 Or Switch(config)spanningtree vlan 1 priority priority ? 手工指定交換機(jī)的優(yōu)先級(jí)（以 4096遞增） 169。 2023 Cisco Systems, Inc. All rights reserved. 查看根網(wǎng)橋 ASW11show spanningtree VLAN00001 Spanning tree enabled protocol ieee Root ID Priority 49352 Address This bridge is the root Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 49352 (priority 49152 sysidext 200) Address Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 Uplinkfast enabled Interface Port ID Designated Port ID Name Cost Sts Cost Bridge ID Fa0/1 3019 LIS 0 49352 Fa0/2 3019 LIS 0 49352 Switchshow spanningtree 169。 2023 Cisco Systems, Inc. All rights reserved. 169。 2023 Cisco Systems, Inc. All rights reserved. 演講完畢，謝謝觀看！
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