cisco 4900 switch

In the complex network environment today, the switch has become indispensable, so the switch manufacturers also develop quickly, here to take Cisco to give us a simple exchange! Cisco: Cisco; A simple introduction: Cisco is the wo

Cisco System Inc. With its IOS (Internet Operating System), Cisco is an absolute leader in the multi-protocol router market. Currently, nearly 80% of routers on the Internet come from Cisco. In fact, Cisco also has a full range of network devices, including hubs, switches, access servers, hardware and software firewall

One outlet had poor contact. Because there was no wiring module, I just fixed the wiring block and the network was ready for use. After a week, the network was broken again and I asked another colleague to change the wiring module, as a result, my colleague told me that changing the wiring module would not work, and the network would still be disconnected. I thought it was strange. I told him that the Network was originally accessible, but the wiring module was not good. I will remove the wiring

================================ The port role is the specified interface, but the status is discarded, no forwarding is provided. It turns out to be an rstp problem. Why is a specified interface discarded? The specified interface should be fowding. Suddenly, a friend prompts me that if the rstp interface is selected as the specified interface, the downstream confirmation is required to enter the forwarding status. The P/A mechanism requires the link between the two switches to be point-to-poin

=" Wkiom1soqq7ck2jtaahgkzym5xw472.jpg "/>(This picture is borrowed from others)Global Configuration Mode:1: enter this mode first. 2: port configuration such as:switch# configureterminalSwitch (config) #interface fastethernet 0/3Switch (config-if) #speed10// Configure Port Rate 10M default AutoSwitch (config-if) #duplexhalf//full Full Duplex Half Half Duplex AutoSwitch (config-if) #noshutdown// Open PortSwitch IP Configuration: The switch divides

Found that Cisco Catalyst Switch reboot is always in rommom mode, the system reboots when the Confreg command chooses the startup mode of 1 (starting from the first file) and cannot enter the normal interface. Enter to boot: 0 = Disable Autoboot 1 = the internal flash device 2 = commands specified in ' BOOT ' environment variable [2]: 1 The analysis suggested that the iOS file might be corrupted or pu

Whether it's on a Cisco router or a network device such as a Cisco switch, the standard ACL access control list is always unable to match both the traffic source address and the destination address, nor does it meet the requirements of the "granular" control of the current network world, such as: A service function that allows access to a server, However, pinging

domain COM settings vtp admin domain name com PAR2 (VLAN) #vtp client to set the switch to clients mode Par3#vlan database into VLAN configuration mode PAR3 (VLAN) #vtp domain COM settings vtp admin domain name com PAR3 (VLAN) #vtp client to set the switch to clients mode Note: Setting the switch to server mode is to allow the creation, modification, deleti

I will talk about two tips, one about monitoring switch port traffic and the other about store value. 1. Monitor switch port traffic Switch monitoring document in the production environment on the Internet. Therefore, it is complete, and a key knowledge is interspersed in the middle. Zabbix is still innocent .!!! In this demonstration, I used the production envir

Batch Processing directly logs on to the cisco switch and executes commands. In many cases, we may log on to the cisco switch to execute some common viewing commands. However, every time we run cmd, enter the password, and enter the command, it is troublesome. It can be achieved through batch processing. For example, i

Tags: Cisco configuration switch Management address and default gatewayConfigure the switch remote management address and default gatewayThe topology diagram is as follows:650) this.width=650; "Src=" Https://s1.51cto.com/oss/201710/29/1b8f7b6af37801733cf03704e748d09a.png-wh_500x0-wm_3 -wmp_4-s_475699717.png "title=" 57.png "alt=" 1b8f7b6af37801733cf03704e748d09a.

relay mode on the port connecting a switch to a vswitch or connecting a vswitch to a vro, this enables data frames belonging to different VLANs to be transmitted through this relay link. The frame format of VLAN relay is divided into two types: ISL (Inter-Switch Link, connection between switches) and 802.1Q. The former is the protocol unique to the Cisco

Pen name is also large, the motto of the gameToday it is the command of the Cisco switch which is the practice of the work operation, I feel that sometimes it may be necessary to trace the port of which the MAC address belongs to the switching device, and to determine the object quickly, I share my exercise to the lovers who need it.The first thing you need to know is the IP address and account password of

Tags: cisco switch password resetCisco switch, what do we do when we forget its login password? How do I clear its password? principle: Enter the bottom of the switch, by modifying the switch original profile name, after restarting the s