cisco portfast

Reason: The company panel interface is not enough, through the small Fool switch expansion interface . phenomenon: Small fool switch Connection panel, then computer connection small fool switch. Found that the computers are not ping gateway, but can ping each other . Description Small fool switch is no problem, the connection between the small fool switch and the original switch fails . View the original switch configuration and find the Portfast conf

First, the experimental topology:Second, the experimental requirements:1, PC0 connection SW1, did not make any changes, see if F0/1 need to wait for 30s to become green;2, SW1 Global deployment of the default port Acceleration command, while the f0/2-5 deployed as Acess port;3, PC1~PC4 connection SW1, accelerate, the second into a green port, shorten the 30s, no longer wait.Third, command deployment:SW1 (config) #spanning-tree portfast Default! []SW1

Tags: int range. com topology type mode config OSS processFirst, the experimental topology:Second, the experimental requirements:1, PC0 connection SW1, did not make any changes, see if F0/1 need to wait for 30s to become green;2, SW1 Global deployment of the default port Acceleration command, while the f0/2-5 deployed as Acess port;3, PC1~PC4 connection SW1, accelerate, the second into a green port, shorten the 30s, no longer wait.Third, command deployment:SW1 (config) #spanning-tree

Label: Ar uses SP on BS as text different classes When the BPDU guard feature is enabled, the port enters the err-Disable state when receiving the BPDU, thus avoiding bridging loops.Generally, BPDU guard is used in combination with portfast. After portfast is enabled on the port, if the BPDU guard is not enabled, STP will bring the port into the blocking state when the port receives the BPDU, after BPDU gu

Portfast and bpduguard configuration switch (config) # interface range f0/1-5 switch (config-if-range) # spanning-tree portfastswitch (config-if-range) # spanning-tree bpduguard enableBPDU Guard enables PortFast ports to enter the err-disable state when receiving BPDU to avoid bridging loops, it can be configured globally or in the interface (disabled by default). You can use the errdisable recovery cause b

The BPDU guard function is to set the port to error-disabled immediately when it receives any BPDU.We know that when the STP function of the switch is enabled, all ports will participate in STP by default, and send andAccept BPDU. When BPDU guard is enabled, under normal circumstances, a downstream dormitory port will not receiveAny BPDU, because both the PC and the small switch do not support STP, do not send and receive BPDU. When this port isIf a self-loop exists, the BPDU sent out by it will

) ghqconfig-if # interface vlan2 (configure VLAN2) ghqconfig-if # ip helper-address 192.168.1.4Enable the Portfast function for all L2 access ports directly connected to the client. To correctly obtain the IP address of the client, you need to enable the Portfast function of the switch port connected to the client (Cisco 2950 ). Note that this function can only b

the root bridge.650) this.width=650; "alt=" Cisco Packet Tracert Spanning tree understanding-Ibm.chick-mingkang.zhou "src=" Http://img2.ph.126.net/BFXqBBOu M06qvncc4ynohw==/6630771997071294761.png "style=" border:0px;height:auto;margin:0px 10px 0px 0px; "/>3, observe the switch is not the root bridge, the port is "blocked".650) this.width=650; "alt=" Cisco Packet Tracert Spanning tree understanding-Ibm.chi

router) Ghqconfig-if #interface vlan2 (configuration VLAN2) Ghqconfig-if #ip helper-address 192.168.1.4 Turn on the Portfast feature on all two-tier access ports that are directly connected to the client For the client to obtain an IP address correctly, the Portfast function of the switch port connected to the client needs to be turned on (Cisco 2950). It is i

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From today onwards, let's show a few of the basic features of Cisco UC, one of the first basic features: Cisco IP Phone.The word Cisco CUCM is bull x!Knowing that the CUCM is a ippbx in a cow's lecture, it provides the phone function of the IP phone to replace the traditional analog phone.In fact, know this is a broken cow, but also in the study of Microsoft's UC

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Half a year five acquisitions Cisco intensive integration for self-redemptionWu MicroCisco, a "takeover guru", recently announced a new deal.The acquisition was Cloudlock, a cloud security company, with a total transaction price of $293 million. This is the fifth takeover deal that Cisco has launched this year.As the world's largest network equipment manufacturer, Cisco