forgot cisco router password

A Cisco router uses Cisco 3620 as the ios dhcp Server. the IP address of the fastethernet0 port connected to the Intranet is 192.168.1.4, And the L2 Switch uses two Cisco 2950, A layer-3 Switch uses a Cisco 3550. There are two VLANs in the network. To simplify the descriptio

This article uses a specific example to illustrate how to configure the access to ADSL through the vro. What problems should we pay attention to during access? The following articles will benefit you a lot. Note: In this case, a common adsl modem and a cisco 25001841) router (dual Ethernet port) and IOS 12.2 (15) T need to be used to connect to the China Telecom adsl PPPoE, able to achieve LAN Internet shar

PC that configures the router must also use a valid power supply. Cisco synchronous serial interfaces are commonly used. Different interfaces can be obtained through different cables. Such as RS232 and V.35. In addition, the cables of Cisco synchronous serial interface cables are specially pre-fabricated. The system automatically enters the dialog setup status d

Many people are not very familiar with the installation and configuration of CISCO routers. It does not matter. Here we will introduce the classic section of the CISCO router tutorial, this gives you a better understanding of vro configurations. This document uses Cisco2620 as an example to describe the configuration and remote access configuration methods in the

Here we will mainly introduce the configuration and initial installation of Cisco routers. Describes how to configure Cisco router settings and remote access, this article discusses how to use the DHCP service function of the internal network to allocate address information for users who remotely dial in and how to troubleshoot common vro faults. 1. Initial insta

This article describes how to configure a vswitch for a CISCO 3550 router and how to configure access control for a MAC address. In network management, users often encounter this situation: some users violate management regulations and modify their own IP addresses without permission to access restricted resources. Such behavior not only undermines information security rules, but may also cause network comm

configuration information in NVRAMCopy run-config atartup config to save the information to NVRAMWrite to save the information to NVRAMErase startup-config clear configuration information in NVRAMShow ip interface briefBanner motd # + Information + # configure the router or switch descriptionDescription + information configuration interfaceVlan database enters VLAN database modeVlan + vlan ID + name create VLANSwitchport access vlan + vlan ID for VLA

The command line port of a cisco router uses a hierarchical structure, which requires logging on to different modes to complete detailed configuration tasks. From a security perspective, cisco IOS divides EXEC sessions into USER mode and privileged mode. Features of the USER mode: In USER mode, only basic monitoring commands are allowed. In this mode, the confi

The importance of vro configuration is self-evident. Here we mainly analyze the Cisco router configuration statements in detail, and share them with you here, hoping to help you. Introduction to Cisco router configuration Cisco ios operating environment. ROM monitor>

How to crack the vro password (CISCO )!Fault symptom:Network devices or large application service software use password protection for security purposes. Therefore, the network administrator needs to enter the correct password and then log on to the network device or service software to change and browse its configurat

Huawei router and the same class Cisco router in the functional characteristics and configuration interface is completely consistent, some aspects also according to the needs of domestic users made a good improvement. For example, in English and Chinese can be switched configuration and debugging interface, so that users do not have to face a large pile of Englis

permission, method 1 is unavailable and you need to go to GRUB to modify the kernel image startup parameters. The ubuntu version 11.04 used in this article is as follows: 1. restart the computer's ESC key or F2 key to enter GRUB boot mode, as shown in. Select recovery mode in the second line. 2. Run the "recovery mode" command to compile the kernel for startup parameters. 3 Add quiet splash rw init =/bin/bash after linux/boot/vmlinuz. Then press ctrl + x to run the command directly. 4. After th

Initial installation of the CISCO router tutorial During the first installation, the system automatically enters the Dialog Setup, as prompted on the screen, answer the router name, encrypted super login password, super login password, remote login

access vlan 4 Switch (config-if) # no shutdown Switch (config-if) # exit Switch (config) # interface f0/3 Switch (config-if) # switchport mode trunk sets this port to relay mode) Switch (config-if) # no shutdown Witch (config-if) # exit. You can directly use ctrl + z or end to exit the privileged mode) 2. Configure single-arm routing on vrocisco Cisco 2611) Router # con

for Cisco IOS software. IOS is usually stored in flash memory, but may also be stored in other locations, such as TFTP (simple File Transfer Protocol) servers. If the complete IOS image cannot be found, the lite version of IOS will be copied from ROM to RAM. This version of IOS is generally used to help diagnose problems, or to load the full version of IOS to RAM. Note: The TFTP server is usually used as the backup server for IOS, but can also serve

the devices connected to the internet have a ground wire. These devices include hosts, workstations, hubs, switches, routers, and MODEM connected To routers. The terminal or PC that configures the router must also use a valid power supply. CISCO synchronous serial interfaces are commonly used. Different interfaces, such as RS232 and V.35, can be obtained through different cables. In addition, the cables of

1. Preface A large number of Cisco routers are used in Jiangxi IP networks. Administrators usually use Telnet to remotely log on to the vro for routine maintenance. Because Telnet, FTP, and other network service programs use plain text transmission passwords and data in the network, their security cannot be effectively guaranteed. Once the Administrator's user name and password are intercepted by someone w

:(1) Step 1: Configure the Router Ethernet interface IP address(2) Step 2: Configure the router password(3) Step 3: Access the router via TelnetCommands for the relevant steps:Configure the Router Ethernet interface IP address (enter the privileged mode, global mode, interfa

1. Commands supported by the switch:Switch Basic Status:Switch:; Rom status, router is rommon>hostname>; user modehostname#; privileged modeHostname (config) #; global configuration modeHostname (CONFIG-IF) #; interface StateSwitch Password settings:switch>enable; Enter privileged modeSwitch#config terminal; Go to global configuration modeSwitch (config) #hostname, set the hostname of the switchSwitch (conf

255.255.255.0 IP nat outside no IP mroute-cache Bandwidth 2000 No Fair-queue clockrate 2000000 Interface Serial1 No IP address shutdown No IP classless IP route 0.0.0.0 0.0.0.0 Serial0 access-list 1 Permit 10.1.1.0 0.0.0.255 Line con 0 line aux 0 Line vty 0 4 password Cisco End 3, multiplex dynamic address conversion applicable environment: Dynamic Address Translation is