Cisco is now the world's largest manufacturer of switching routes! Many of our businesses, large and small, can use the network, and it is possible to switch routes to Cisco! When we install network equipment, we may ask the network engineer to help us install it! Access to the router has a lot of passwords! What if we forget these passwords? We may have to make changes to the routing entries when our compa
Use a domain account to centrally manage cisco network devices and cisco network devices
1. Background of integration of Cisco devices and Microsoft Systems:
There are a certain number of clients in the company. In order to achieve unification, a domain architecture is deployed in the management, so that the client can be batch managed through group policies, imp
For Cisco Network Assistant (CNA), it is estimated that Cisco has launched a free tool that can be used to configure Cisco devices such as Catalyst switches, PIX firewalls, IP phones, and wireless access points, CNA support, As long as it is facing small and medium enterprises. CNA provides a number of features and wizards. The following figure:
CNA provides c
"Introduction" Within a switched network, it is possible to segment and organize flexibly through VLANs. VLANs can group devices in a LAN. A group of devices in a VLAN communicates as if it were connected to the same line. VLANs are based on logical connections, not physical connections. Types of VLANsThere are many different types of VLANs used in modern networks. Some VLAN types are defined by traffic category. Some other VLAN types are defined by specific features.Data VLAN: used to deliver u
Automatic backup and fallback of Cisco iOS profiles requires the use of the Archive Archive configuration mode feature of iOS. In general, only the version number of iOS has the Archive configuration mode feature in 12.3 (4)
Cisco iOS profile automatic backup All commands are as follows:
router>
Router>enable
Router#configure Terminal
Router (config) #archive
Router (config-archive) #write-memory
Trunk Link Trunk: Same inter-VLAN communication on different switchesHow to play tag tag encapsulationPackage Type: IEEE 802.1q/cisco ISLIEEE 802.1q:4 Bytes, internal encapsulation, publicCisco isl:30 bytes External encapsulation, privateSwitch port configuration mode: Trunk/acces (OFF)/Dynamic desirable/dynamic AutoTwo auto NO mode of operation generally either trunk or accessEthernet Channel: Multiple physical ports to form a logical port for greate
Tags: tle simulates a trunk mode ace 51cto fast spanning tree quick typeLoops are present in the network, and all loops are formed due to confusion caused by ambiguous destination paths. The loop has a great impact on the network. Spanning Tree protocol is a good solution to this problem.The idea of spanning a tree protocol topology is that, regardless of the physical connection between switches, the switch can automatically discover a network with no loop topology, and the network of the logica
Now that Cisco Nat is flexible, Can Linux implement it? The answer is yes! Linux netfilter is super flexible, and Linux Nat is not flexible because the iptables program is not flexible. xtables-Addons rawnat has taken an important step towards static Nat, iptables restricts the development of static Nat in Linux! So I put aside iptables, first implemented the kernel module based on Netfilter, and then used procfs as the user interface to see how to im
Cisco CCNA Chapter 2 answers for the third semester, Cisco ccna for the third semester
1. Which command line interface (CLI) mode allows users to configure switch parameters such as host name and password?
User Execution Mode
Privileged Execution Mode
Global Configuration Mode
Interface Configuration Mode
2.
Configuration example of cisco router and layer-3 Switch environment, cisco layer-3 SwitchSimple environment configuration instance for cisco router layer-3 Switch
I. network topology:
Ii. configuration command:
1. vro Configuration:
Interface FastEthernet0/0
Ip address 10.66.88.222 255.255.255.0
Ip nat outside
Duplex auto
Speed auto
Interface FastEthernet0/1
I
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Cisco configuration instance _ Cisco dual-Egress NAT configuration objective: to simulate the routing function based on the original address policy when a dual-Egress link is available, and access to the external network from different original addresses is realized, in most cases, the vro uses NAT to translate the Intranet address on the external port, so this experiment also uses dual NAT to translate the
Introduction after you log in to the CISCO switch, we will need to use some common operations, such as querying, restarting, and so on, where some of the commonly used operations are grouped together. Query HelpIn different modes, we can enter the question mark directly (? You can query all the commands that you can use in the current mode. When entering a command, if you do not remember the full name of the command, enter the first few characters
LAN is not changed, and the configuration and access control list of the external network Port WAN needs to be changed .Increase the configuration of the VPDN. Assuming the username is admin, password 123456, the configuration process is as follows:This case is XX Telecom ADSL PPPoE access, need to use a common ADSL modem and a Cisco 2600 router (dual Ethernet port), IOS 12.2 (), can realize LAN sharing Internet. This case configuration is divided i
Tags: process proc ima RAC Technology share static term ADOBy configuring static routes, you can achieve an increase in routing entries for routers in a relatively simple network.However, if there are more than 20 routers in a network, it is difficult to configure static routes to accommodate the complexity of routing entries and changes in the network. At this point we can use the RIP protocol to configure simple dynamic routing, thus reducing the workload.Configuration ideas1 Configure the IP
policy in Router 2, specifying host and port7 The ACL takes effect under the port of the Router 2 Xia Lian serverNetwork topology1 Configuring Router 1 single-arm routing, establishing sub-interfaces and configuring IP addresses, etc.2 Configuring the Switch's VLAN and port type3 Configuring the IP address of the PC4 Configuring the interface address for Router 25 Configure static routes to communicate properly between networks6 Configure the ACL policy on Router 2 to allow PC1 to access the se
port to enable ACL policyNetwork topology1, configure Router 1, turn on the single-arm routing configuration subinterface address and connect the physical interface address of another route and open the port2 Configuring the VLAN of the switch, configuring the port type3 Configuring the IP address of the PC, specifying the gateway4 Configuring router static routing to enable network interoperability5 Create a new ACL policy on the destination router6 Enter the destination port to make the new A
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