Cisco router register configuration objective: Register configuration is used to change the router startup process. The Start bit consists of four hexadecimal registers. The value range of 0 xABCD www.2cto.com ranges from 0x0 to 0 xFFFF 0x2102: Industrial default value 0x2142: starts from FLASH, but do not use the configuration file (for Password Recovery) in NVR
When a Cisco router forgets or loses the enable password, there are two methods to restore it, depending on the series of products you are using.Method 1Steps:1. Connect a terminal or a PC with simulation terminal software installed on the console port of the router.The default register value is 0x2102. The value ranges from the third digit to the left. If it is 1, it is disableBreak. If it is 0, the Break
Cisco router ACL wildcard192.168.1.20-192.168.1.50 range of networksA contiguous address, the form of a wildcard mask must be:11111111=25501111111=12700111111=6300011111=3100001111=1500000111=700000011=300000001=1For range 20-50, be sure to use Access-list 1 per 192.168.1.0 0.0.0.63, then go head to tail0-16 the maximum block address that can be contained is 16:access-list 1 deny 192.168.1.0 0.0.0.1516-19
Router#show Run
Building configuration ...
Current configuration:1115 bytes
!
Version 12.2
Service Timestamps Debug Uptime
Service Timestamps Log uptime
No service password-encryption
Hostname Router
!
No logging on
Enable Secret 5 $1$OYEO$B.DP73YBQILQNQSUV/WMX1
!
IP Subnet-zero
!
!
!
VPDN Enable
!
Vpdn-group 1
Request-dialin-----request-dialin is for the client.
Protocol PPPoE
!
!
!
The market demand for Cisco routers is still very high, so I studied the knowledge about the default password of Cisco routers and shared it with you here. I hope it will be useful to you. The following are some default initial IP addresses, user names, and passwords used for Factory installation of ADSL, which must be known for debugging.
There are three methods to debug these settings:
One of the most c
Cisco router Entry 1First, let's take a look at the Memory RAM of one of the vro's internal components: Random Access to the memory, which is equivalent to the memory of the computer and is volatile (all storage content will be lost after power failure ), the main software running is the IOS image and configuration file. ROM: read-only memory, which resident some microcodes used to start and maintain basic
The company's GPS patrol system needs to go WVPDN to communicate, but before looking for a telecommunications took a CISCO2811, collapsed once, the 2811 is the telecommunications sent, the estimated quality is not how, and then to find the company to buy the same type of equipment, 2811 discontinued, on the Cisco 2911.Yesterday arrived Ah, excited a bit, super terminal connected on, looked at the system configuration, the result of the hand is cheap,
Application (ACL) of the access control list of cisco router Integrated Experiment ii ip Address Configuration on each device, steps ======================================================== ========================================================== ======================================= Configure route R1: (config) # ip route 0.0.0.0 0.0.0.0 192.168.1.254 route www.2cto.com R2: (config) # ip route 0.0.0.0
NAT configuration instance for cisco router with port ing
If the ISP provides many IP addresses, you can use NAT to map an external address to each server. However, if it is not the case (for example, if it is only two times), there are four servers in the Intranet that need to provide external services, one for Intranet address translation and the other for providing services on the Internet.Interface fast
whether you have loaded an IPSec IOS image that supports SSH.
In our example, we will use the Cisco IOS command. Run the following command:Router> Show flashThis command displays the name of the loaded IOS image. You can use the result to compare the list of supported features of your supplier.After you verify that your device supports SSH, make sure that the device has a host name and a correctly configured host domain, as shown below:Router> config
How to configure remote logon for a Cisco router IP Address
Configure the vro IP Address
Run the command ip address x. x to configure the ip address. The command is as follows:Router2800> enable (in privileged Mode)Router2800 # configure termial (entering global configuration mode)Router2800 (config) # int f0/1 (enter Interface Configuration Mode)Router2800 (config-if) # ip address 192.168.0.1 255.255.255
Cisco router VLan isolation LAN broadcast packet configuration experiment and summary, ciscovlan
1. Tutorial Description: connect to and set the IP address of the PC according to the network topology. PC1 and PC2 are required to be accessed on VLAN 12, while PC3 and PC4 are accessed on VLAN 34, PC1 and PC2 are interconnected, PC3 and PC4 are interconnected, and VLan 12 and VLan 34 are interconnected to isol
Article Title: simulate a cisco router using dynamic in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
Environment: centos5.2
Software: dynamic. cisco-ios
1: Download the dynamic binfile.
Wget http://www.ipflow.utc.fr/
CISCO Router Network Address Translation (NAT)Tutorial name: Cisco Router Network Address Translation (NAT) objective: to connect all Intranet IP addresses to the Internet using a small number of public IP addresses. Tutorial Introduction: using NAT technology, when an intranet private address sends data packets to a v
Tags: Cisco CCNA router Password managementfor device security, the device administrator typically sets the user name and password for the device. Here's how to configure 3 passwords, with emphasis in the middle.Username Test password Cisco//This is to set up a layer of accounts and passwordsEnable password 123// This is the Setup admin passwordRouter (config) #l
Cisco port status: CSU ── channel server unit, DSU ── data server, unit, DTE ── DataTerminalEquipment
1. Serial * is down, line protocol is down (DTE) faults:
[1] No power is added to the vro.
[2] LINE is not connected to CSU/DSU.
[3] hardware error.
Solution:
[1] Check power supply.
[2] Check whether the cables and serial ports used are correct.
[3] switch to another serial port.
2. Serial * is up and line protocol is down (DTE) faults:
[1] local or
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