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In the Cisco router product, we usually need to use restricted access for general users when we initially configure. This is very important for routers, by default, our router is an open system, access control options are turned off, any user can log on to the device for further attack, so we need our network administr
) # vlan 2; Create VLAN 2Switch (vlan) # no vlan 2; DeleteVlan 2 switch (config) # int f0/1; enter port 1Switch (config-if) # switchport access vlan 2; Add the current portVlan 2 switch (config-if) # switchport mode trunk; set to trunk LineSwitch (config-if) # switchport trunk allowed vlan 1, 2; set to allowVlanswitch (config-if) # switchport trunk encap dot1q; Set vlan RelaySwitch (config) # vtp domain; set the vtp domain name to be sentSwitch (config) # vtp password; set the vtp passwordSwitch
There are a lot of users using Cisco routers, So I studied the global debugging of Cisco routers and shared it with you here. I hope it will be useful to you. When configuring a Cisco router, the boundaries between global and interface commands are obvious. In this case, we use "Global" to identify commands that cannot
occur. Check the port configuration and route configuration of Cisco 3640, and find that the port IP address is configured normally, but there are two routes in the route list:
Ip route 0.0.0.0 0.0.0.0 192.168.10.2
Ip route 0.0.0.0 0.0.0.0 10.255.12.254
Because the Department's network is the lowest subnet in the Unit's Wan, the whole unit's Wan is accessed according to business needs, and the Department's network is only connected to department B th
server has a set callback, the server dials back the phone number that has been set up or asks the user to choose the callback. below is the specific configuration: ------------------------- Access#show Run Building configuration ... current configuration:1833 bytes !version 12.2 No parser cache No service single-slot-reload-enable Service Timestamps Debug uptime Service Timestamps log uptime No service password-encryption !hostname Access ! Access server with Name No logging rate-
When the cisco router is powered on normally, perform the following steps:
1. Test the router hardware
When a cisco router is started, a hardware self-check program POST is initiated. This program checks basic hardware functions including CPU, memory, and network interface
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
Tenda Tengda: User name: admin; Password: admin
Modify User name Password:
Please try to use: User name: admin, Password: admin enter can. If not, see the instructions on the back of the route. Then modify the password in the System tool
Tp-link Username: admin Password: admin
First open the browser, enter the routing address, generally are 192.168.1.1 (see your route behind the write), and then pop-up router
Some of the comrades may not be very clear about the DHCP configuration of Cisco routers, and most people do not know about the computer, so, the customer asked us to allow any computer to access the LAN to access the Internet, so we had to configure DHCP 2600. 2600 router we identify as: Cisco enters global mode.
Cisco
. Cisco private protocols, such as VPN, are not required ), this article provides a configuration example for Cisco router configuration and Huawei router OSPF serial port connection for analysis.
2. Interconnection
Iii. configuration file description
Currentconfiguration:
!
Version12.1
Servicetimestampsde
configuration information1. When the switch is powered on and started, press and hold the Sys Req button on the back panel of the switch for 5 seconds, and then release it;2. Go to the configuration menu and select "Clear Non-Volatile RAM" to Clear all Cisco router configuration information including passwords of the vswitch ).3. reconfigure parameters and passwords as needed.
Method 1
1. Enter the Mainten
Recently changed jobs, the company more than 40 people share a 20M bandwidth wireless network, the router for Cisco R2911. Boss, let me make a cacti to monitor Cisco routed network card traffic. The whole days can not get the SNMP data, finally to the routing permission to find that the last operation to the routing SNMP service off, leaving the document written
-config) # default-router 192.168.1.254 (here I plan to use this IP address for VLAN10) r1 (dhcp-config) # exitSW1 (config) # int vlan 10SW1 (config-if) # ip helper-address 192.168.100.254 (here I will draft a physical interface on the router as this ip address.
Note that When configuring VLAN relay proxy, this is not a real
receive a morning e-mail that lists all router events that occurred the previous day. the scripts go to each router and use a command similarShow logging | include May 16To gather the date, combine it in a file, and e-mail it to all network administrators.
So, when a router reboots, if no one has configured NTP, then the command will find no data from that
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
router tutorial
Cisco2620 (config) # interface serial 0/0: Enter Synchronous serial Port SettingsCisco2620 (config-if) # ip unnumbered fastFastethernet 0/0: Synchronous Serial Port uses the same ip address as the fast Ethernet portCisco2620 (config-if) # encapsulation ppp: sets the data link layer protocol as PPP.
Set up the 16-port Modem dialing module and use the internal DHCP service to allocate addresses to the dial-in users.
Cisco2620 (config)
Cisco router configuration mode
In general, you can configure your router in 5 ways:
1.Console Port connection terminal or running terminal simulation software of the microcomputer;
2.AUX Port Connect modem, connect with remote terminal or computer running terminal simulation software by telephone line;
3. Via the TFTP server on the Ethernet;
4. Adoption of
through. Insert the DB25M header of the straight-through serial communication cable into the Console port of the router, and then insert the other end into the serial port of the terminal.
Software connection
As mentioned above, if the terminal used for 10 s configuration is a PC, you must run the terminal simulation software so that we can enter 10 s commands and view IOS information. The source of the terminal simulation software is very wide. It c
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 1
You can use this method to restore the following vrouters: cisco 2000 Series, 2500 series, 3000 series, Cisco 680 series with 4000x0 Motorola CPU, and 10.0 series r
Configure the PPPoE configuration for connecting a CISCO router to an ADSLmodem through the PPPoE configuration: hostnamebjsite! Ipsubnet-zeronoipdomain-lookup! Vpdnenablenovpdnlogging! Vpdn-group1request-dialinprotocolpppoe! Interfaceethernet00ipaddh
Configure PPPoE for connecting a CISCO router to an ADSL modem using
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