h3c交换机环路检测方法

ZCNEZCNEPAGE2H3CLoopbackDetection2015-05-14LoopbackDetection1SwitchASwitchB、被高压击坏等情况导致GE0/0/1TX-RX而影响现有SwitchA上及时出GE0/0/1上存在TX-RX并希望存在时阻塞以减小对现有冲击，消失时能动恢复。1LoopbackDetect思路SwitchA上行GE0/0/1TX-RXSwitchA上该上LoopbackDetection功能。思：SwitchAGE0/0/1LoopbackDetection功能现对该TX-RX。ZCNEZCNELoopbackDetectionSwitch。操步骤1.使能LoopbackDetection功能2.2.<HUAWEI>3.[HUAWEI]SwitchA4.[SwitchA]interfacegigabitethernet0/0/15.[SwitchA-GigabitEthernet0/0/1]loopback-detectenable[SwitchA-GigabitEthernet0/0/1]quit6.LoopbackDetection7.7.[SwitchA]interfacegigabitethernet0/0/18.[SwitchA-GigabitEthernet0/0/1]loopback-detectactionblock9.[SwitchA-GigabitEthernet0/0/1]loopback-detect30[SwitchA-GigabitEthernet0/0/1]quit证结果displayloopback-detect检查是否成功。b.b.[SwitchA]displayloopback-detectc.c.Loopback-detectsending-packetinterval: 5d.d.e.e.f.InterfaceRecoverTimeActionStatusg.h.GigabitEthernet0/0/130blockNORMAL。i. 后，等待一段时间（5秒），displayloopback-detect检查接口GE0/0/1是否被阻塞。j.[SwitchA]displayloopback-detectj.[SwitchA]displayloopback-detectk.Loopback-detectsending-packetinterval: 5l.m.m.n.InterfaceRecoverTimeActionStatuso.p.GigabitEthernet0/0/130block BLOCK(Loopbackdetected)ZCNEZCNEGE0/0/1TX-RX。q. TX-RXdisplayloopback-detect检查GE0/0/1是否恢复为正常状态。r.[SwitchA]displayloopback-detectr.[SwitchA]displayloopback-detects.Loopback-detectsending-packetinterval: 5t.u.u.v.InterfaceRecoverTimeActionStatusw.x.GigabitEthernet0/0/130blockNORMALGE0/0/1已恢复为正常状态。配置文件SwitchA的配置文件#sysname#sysnameSwitchA#interfaceGigabitEthernet0/0/1ZCNEZCNEPAGE10loopback-detectloopback-detect30loopback-detectenableloopback-detectactionblock#returnLoopbackDetection1SwitcVLAN10Switch及其上行信。用户希望能在Switch上中防止影响Switch及其连正常信。1LoopbackDetectionZCNEZCNEN0Switchkn。采用如下LoopbackDetection：SwitchGE0/0/1使LoopbackDetection并VLAN进行现对下行的。LoopbackDetection的相关参数Switch到后及时关闭接口1Switch:: IHACKLOG_REMOTE_IMAGE_AUTODOWN_BLOCK ::2说明：kdVLAN通过保证及Switch间的二层互通。操作步骤1.使LoopbackDetection2.2.<HUAWEI>3.[HUAWEI]Switch4.[Switch]interfacegigabitethernet0/0/15.[Switch-GigabitEthernet0/0/1]loopback-detectenable[Switch-GigabitEthernet0/0/1]quit6.VLAN报文进行7.7.[Switch]vlan1008.[Switch-vlan100]quit9.[Switch]interfacegigabitethernet0/0/110.[Switch-GigabitEthernet0/0/1]port11.[Switch-GigabitEthernet0/0/1]porttaggedvlan10012.[Switch-GigabitEthernet0/0/1]loopback-detectpacketvlan100[Switch-GigabitEthernet0/0/1]quitLoopbackDetection#LoopbackDetection。[Switch]loopback-detectpacket-interval[Switch]loopback-detectpacket-interval10#LoopbackDetection处理动作。[Switch][Switch]interfacegigabitethernet0/0/1[Switch-GigabitEthernet0/0/1]loopback-detectactionshutdown[Switch-GigabitEthernet0/0/1]quit证结果displayloopback-detect查是否成。b.b.[Switch]displayloopback-detectc.Loopback-detectsending-packetinterval:10d.d.e.f.f.InterfaceRecoverTimeActionStatusg.h.GigabitEthernet0/0/1- shutdownNORMAL。i. 在下挂网络中构造环路，然后执行命令displayloopback-detectGE0/0/1是否关闭。j.[Switch]displayloopback-detectj.[Switch]displayloopback-detectk.Loopback-detectsending-packetinterval: 10l.m.m.n.InterfaceRecoverTimeActionStatuso.p.GigabitEthernet0/0/1-shutdownSHUTDOWN(Loopbackdetected)GE0/0/1被关闭了。文件Switch件##vlanbatch#loopback-detectpacket-interval10#interfaceGigabitEthernet0/0/1portporttaggedvlan100loopback-detectpacketvlanloopback-detectenable#returnLoopbackDetection检测设备所在网络环路示例ZCNEZCNE1VLAN100。由于人员流动性大络拓扑变动频繁，Switch以及整个络的通信。Switch上检测到络中的环路并希望环路存在时阻塞接口以减Switch及其所在络的冲击环路消失时阻塞接口能自动恢复到正常状态。1配置通过LoopbackDetection检测设备在络环路例配置思路Switch在络是否存在环路SwitchGE0/0/1GE0/0/2上分别配置LoopbackDetectionwhdSwitch进而无法现环路检测VLAN进行环路检测。配置思路下：使能接口的LoopbackDetection功能VLAN100进行环路检测Switch在络的环路检测。LoopbackDetection处理动作和接口自动恢复时间现发现环路后Switch自动阻塞接口以减少环路对其及其在络的冲击环路消失后接口自动恢复。ZCNEZCNE:: IHACKLOG_REMOTE_IMAGE_AUTODOWN_BLOCK ::4kdVLAN。操作步骤1.使能LoopbackDetection功能2.2.<HUAWEI>3.[HUAWEI]Switch4.[Switch]interfacegigabitethernet0/0/15.[Switch-GigabitEthernet0/0/1]loopback-detectenable6.[Switch-GigabitEthernet0/0/1]quit7.[Switch]interfacegigabitethernet0/0/28.[Switch-GigabitEthernet0/0/2]loopback-detectenable[Switch-GigabitEthernet0/0/2]quit9.VLAN报文进行环检测10.10.[Switch]vlan10011.[Switch-vlan100]quit12.[Switch]interfacegigabitethernet0/0/113.13.[Switch-GigabitEthernet0/0/1]port14.[Switch-GigabitEthernet0/0/1]porttaggedvlan10015.[Switch-GigabitEthernet0/0/1]loopback-detectpacketvlan10016.[Switch-GigabitEthernet0/0/1]quit17.[Switch]interfacegigabitethernet0/0/218.[Switch-GigabitEthernet0/0/2]port19.[Switch-GigabitEthernet0/0/2]porttaggedvlan10020.[Switch-GigabitEthernet0/0/2]loopback-detectpacketvlan100[Switch-GigabitEthernet0/0/2]quit21.LoopbackDetection作和环路消失后接口的自恢复时间22.22.[Switch]interfacegigabitethernet0/0/123.[Switch-GigabitEthernet0/0/1]loopback-detectactionblock24.[Switch-GigabitEthernet0/0/1]loopback-detect3025.[Switch-GigabitEthernet0/0/1]quit26.[Switch]interfacegigabitethernet0/0/227.[Switch-GigabitEthernet0/0/2]loopback-detectactionblock28.[Switch-GigabitEthernet0/0/2]loopback-detect30[Switch-GigabitEthernet0/0/2][Switch-GigabitEthernet0/0/2]quitdisplayloopback-detect。b.[Switch]displayloopback-detectb.[Switch]displayloopback-detectc.Loopback-detectsending-packetinterval: 5d.h.GigabitEthernet0/0/130blockNORMALi.NORMALGigabitEthernet0/0/230blocke.f.Interfacee.f.InterfaceRecoverTimeActionStatusg.j. 后，等待一段时间（5秒），displayloopback-detect接口GE0/0/1GE0/0/2有一个被阻塞。k.k.[Switch]displayloopback-detectl.Loopback-detectsending-packetinterval: 5w.w.x.InterfaceRecoverTimeActionStatusy.m.m.q. GigabitEthernet0/0/130blockNORMr. GigabitEthernet0/0/230blockBLOCK(Loopbackdetected)n.o.InterfaceRecoverTimeActionn.o.InterfaceRecoverTimeActionStatusp.AL. 10displayloopback-detect2是否