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By default, different network segments cannot communicate with each other. However, in practice, different CIDR blocks need to communicate with each other. In this case, layer-3 devices are required for route forwarding. Currently, layer-3 switches

I think everyone will often forget the vswitch or vro password and forget how to restore the password? Based on my engineering experience, I have summarized the following:Steps for recovering the vswitch Password⒈ Connects the console port of the

Edit comments:I believe that many Internet users will "deal" with broadband routers directly or indirectly, but during the long-term use of broadband routers, people seldom look at them, even in the case of various access failures on the network,

A wireless router is a device used to connect a home or enterprise LAN to the Internet. A wireless router can provide greater mobility than a wired router to a portable PC. Routers work like firewalls because they hide the IP addresses of each PC

Have you ever encountered this problem in daily network management and maintenance: You have been forcibly rejected by a vro or vswitch, a former "friend", because you forgot your password, parameter resetting and information statistics are not

In router fault analysis, the Ping command is a common and practical network management tool. It can be used to test the end-to-end connectivity, that is, to check whether the source-to-target network is smooth. The Ping principle is very simple,

The size of the Internet doubles every one hundred days. The customer wants to achieve uninterrupted availability within 7 days and fast system response time, rather than repeatedly seeing a site "Server Too Busy" and frequent system faults. As the

In a single machine, the network administrator can set the startup sequence of the PC, such as starting from the hard disk, or from the disc and network drive. In fact, you can also change the startup sequence in the vro. Sometimes, it is very

After reading the vro installation guide, I have a new understanding of ADSL. Under the guidance of these four steps, it is very easy to complete the installation of the vro. For example, set the IP address and browser correctly. Wireless Router

The network has become an indispensable office assistant for enterprises. It brings convenience to the network and various hidden concerns, such as bandwidth resource abuse, virus intrusion, and ARP attacks, these are all headaches for managers.

As we all know, setting an access control list ACL on a vro or vswitch can improve security and prevent hacker and virus attacks to a certain extent, my company has been using this method. However, I found a problem affecting security in my actual

I. Experiment Configuration R1: R1 # sh runBuilding configuration... Current configuration: 738 bytes!Version 12.4:Service timestamps debug datetime msecService timestamps log datetime msecNo service password-encryption!Hostname

  ______ | Chapter 2 | ------ Classification of route selection protocols Routed protocols such as ip ipx appletalk Routing protocol (routing protocol) such as RIP (route information protocol) IGRP (Internal Gateway selection protocol) Route table

Route introduction:What is a route: A route is a message to the destination, which indicates the direction to the destinationTo complete data packet transmission, the router must know and process the following information:1. Destination Address2.

  As shown in the topology, R1 acts as the switch and DS1 acts as a multi-layer switch, AS1, and AS2 simulate hosts. AS1 and AS2 automatically obtain the IP address and use R1 as the dhcp server. R1 is configured as follows: Ip dhcp excluded-address

  The specific settings are as follows: The main router configuration is the same as the original one. You only need to enable the Bridge function. In the Bridge field, enter the mac address (mac address of the LAN port) of the secondary router

  Topology   Router configuration   After the configuration is complete, view the IP address   Configure the client and add a CIDR Block of the vro to point the gateway to the IP address of the Intranet interface.     With the client, you can

  DHCP Configuration   Router (config) # ip dhcp pool name # Create a pool named name   Router (config) # ip dhcp excluded-address ip-address [end-ip-address] # Retain IP addresses in DHCP   Router (dhcp-config) # network ip-address mask # Specify

Today, I am bored with doing a single-arm routing experiment. An interesting phenomenon was found. When the configuration was completely correct, the two hosts could not communicate, and the cause was found after analysis.The experiment topology is

R1Router> enaRouter # enaRouter # conf tEnter configuration commands, one per line. End with CNTL/Z.Router (config) # host R1R1 (config) # no ip domain lookupR1 (config) # line con 0R1 (config-line) # logg synR1 (config-line) # int s1/1R1 (config-if)