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For details about how to configure DHCP for a CISCO 3550 switch, refer to some configuration content in this article for comparison and learning. After "ip helper-address dhcp server ADDRESS" according to the configuration described on the Internet, the project finds that the client cannot obtain the ip address from the DHCP server, I recently configured 3550 as
80) on the Catalyst 3550-24-smi, and 4 VLANs need to be implemented with a 1000base-x link and catalyst 4006 gigabitethernet3/ 6 port connection, you must create a trunk between Catalyst 4006 and Catalyst 3550-24-emi. In addition, all servers are connected to the Catalyst 4006 1000base-t module and become a separate VLAN (VLAN 90), so you must also create a VLAN for these switches and assign all ports to that VLAN. It should be noted that, given the need for network management, several RJ-45 p
Cisco router SSH Login Advanced Configuration enablewww.2cto. comconfigureterminalenablesecretciscoservicepassword-encryption enable password encryption service aaanew-modelaaaauthenticationloginAAA_LOCALlocalusernamesunchaosecretcicsousernamecocoesec Cisco router SSH logon Advanced Configuration enable www.2cto.com co
principle, using a Udpecho request instead of a ICMPECHO request to initiate an attack. While cyber security experts are focused on developing devices that block Dos attacks, they have little effect because Dos attacks exploit the weaknesses of the TCP protocol itself. Properly configured routers can effectively prevent Dos attacks. In Cisco routers, for example, the iOS software in Cisco routers has many
Cisco's Internet Operating System IOS) is a complex operating system optimized for the Internet. There are many IOS skills on the Internet, but most of the best skills are not enough to form a complete article. Today, I want to use one of the Chinese IT labs to describe five tips for using Cisco IOS. I believe these skills will definitely make the network administrators work more efficiently. Tip: simplify command input It can be asserted that almost
We know that PPP and point-to-point protocols are commonly used. Related settings are available on many devices. Here we will give a detailed explanation of the configuration of cisco ppp. Let's take a closer look at the authentication configuration involved. Cisco ppp configuratio
RIP and IGRP are commonly used router configuration protocols. What problems should we pay attention to when configuring RIP and IGRP? What should we do? The following configuration steps provide detailed answers. RIP Protocol RIP (Routing information Protocol) is an Internal Gateway Protocol (IGP) that is widely used earlier and is suitable for small-sized similar networks, is a typical distance-vector p
Cisco single-arm route Configuration Single-arm routing: multiple logical sub-interfaces are configured on the vro. Each sub-interface corresponds to a vlan. Data of each sub-interface must be tagged and encapsulated when transmitted on the physical link. Cisco devices support ISL and 802.1q (dot1Q) protocols. Huawei only supports 802.1q. What is the difference
I. BackgroundCustomers need to use, the demand is so simple. Say it briefly. There are too many network devices, the traditional manual backup network device configuration information workload is more and more large, and difficult to manage. There has to be a simpler way of doing this.Second, backup modeOne, Cisco device comes with kron command +tftp/ftp/httpThis kind of backup method is relatively simple,
There are many vro settings. Here we will mainly explain the pppoe configuration. So today's router is a CISCO router. For details about the specific CISCO PPPoE configuration, refer to the following. The configuration of CISCO PP
CISCO PT Simulation Experiment (11) router single-arm routing configurationExperimental Purpose : Master The configuration method of single-arm routingImplementing different VLANs to communicate with each otherIn-depth understanding of VLAN communication Principles and routing sub-interfacesExperimental Background :the company's technical and sales departments in different offices, technical department and
Spanning Tree Protocol configuration for the Cisco PT Simulation Experiment (5) switchExperimental Purpose : Understanding how spanning Tree protocol works Mastering the Fast Spanning Tree protocol RSTP basic configuration method Experimental Background : The company's finance department and the sales department of the PC through 2 switches to ac
complete, you can use the "show vlan #" command to display a specific vlan information and verify VLAN parameters. For example:Switch # show vlan 3 2. configuration of multiple switchesTo allow a VLAN to span multiple switches, you must configure the trunk (trunk) to connect to these switches. Cisco requires that trunk protocols such as ISL be used on such trunk links, so the command to enable trunk protoc
Vswitch Virtual Network (Virtual LANs) settings:VLAN division and external VLAN routing settings on Catalyst 5000Assign a VTP Domain)Add Cat5000 to the domainSpecify the relay port (a Trunk)Dynamic ISLAllocate VLAN to PortSet VLAN 20Configure the RouterNote: There are three VLANs, which are routed between VLANs through the Router.-Allocate VTP DomainsWhat is VTP?VTP is short for VLAN Trunk Protocol. It provides each device (router or LAN-switch) to send broadcasts on the trunk ports. these broad
I. Basic configurations of Cisco 2950 vswitches Switch> Switch> enable Switch # Switch # vlan database (entering vlan maintenance mode) Switch (vlan) # vlan 2 name vlan2 name vlan 2 vlan2) Switch (vlan) # vlan 4 name vlan4 name vlan 4 vlan4) Switch (vlan) # exit. Note that exit is valid only when exit is enabled. You cannot exit directly with ctrl + z or end because the configura
CISCO PT Simulation Experiment (4) VLAN partitioning and configuration of switchesExperimental Purpose :Master The basic configuration of virtual LANs (VLANs);Master the configuration method of switch port VLAN and tag VLAN;Master the configuration method for VLAN trunking (
Vswitch span technology Overview + Cisco configuration example 1. Introduction to span The span technology is mainly used to monitor data streams on vswitches. It can be divided into two types: Local span and remote span.---- Local Switched Port Analyzer (SPAN) and remote span (rspan) have slightly different implementation methods. Using the span technology, we can copy data streams or mirror 1 on some vswi
Cisco switch +h3c switch SSH configuration (Cisco shutdown Telnet)Cisco Switches Enter Switch configuration mode: A) coresw#configure Terminal Configure Switch Name: A) coresw (config) #hostname coresw(optional configuration
In Cisco router configurations, NAT configurations are frequently used. I hope the introduction below will be helpful to the majority of fans. It is a common method. The vro performs simple NAT translation and sets a CIDR Block in the NAT address pool. After a while, I found that the address pool was a waste of time. When I wanted to use a real ip address, I couldn't use it, so I decided to modify the Cisco
CISCO mds FC optical fiber switch configuration reference(1) There are several concepts that must be clarified (different from brocade ):(1) brocade divides zones directly. While mds divides zones under vsan, mds can divide several vsan first, and each vsan includes several zones.(2) brocase: the default port is open, while the default port of mds is closed.(3) mds has a Default zone: "The Default Zone ". i
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