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
Cisco CCNA Chapter 4 answers in the second semester, Cisco ccna second semester
1.
2. All the routers running the Distance Vector Routing Protocol have disconnected all power supplies (including spare batteries ). What happens when these routers are reloaded?
They share all route information stored in NVRAM before the power-off with the directly connected neighbor
"Introduction" Cisco switch Catalyst 3750-e Series production in 2007, the original system is very old, in order to let it out of the spring, we can upgrade its system. Pre-upgrade preparationFirst we need a new version of the Catalyst 3750-e Series Cisco switch ISO file, online searchable to many, here we recommend a 2015-year version of the download link is:Cisco switch Catalyst 3750-E Series ISO (2015)Th
One, Cisco Discovery Protocol (CDP)The Cisco Discovery Protocol (Cdp,cisco Discovery Protocol) enables the collection of hardware and protocol information for adjacent devices for troubleshooting and network judgment.1. Get CDP timer and hold time informationR0#show CDP #查看整个路由器的CDP信息R0#sh CDP Interface #查看每个接口的路由信息2. Set CDP timeR0 #cdp Time 60R0#CDP Holdtime 18
Tags: Baidu search switch public Cisco errorCISCO 6500 Series SwitchesiOS version: Version 12.2 (SXJ)Exception logs for Cisco 6500 series switches: NRGYZ:ERROR:Database uninitialized, in addition to watching device performance, when viewing the history of device CPU usage, will find that the CPU is a lot of time to go to 100%!!!650) this.width=650; "title=" CPU Usage History "src=" https://s5.51cto.com/wyfs
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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Tags: HSRP working principle STP effect ACL access control List loop storm Cisco private protocolDay 031. What is HSRP? How does it work?HSRP: Hot Standby Routing protocolHSRP is a Cisco private protocol that ensures that user communication can be quickly and transparently restored when a network edge device or access link fails.This provides redundant rows for the IP network. By using the same virtual IP a
Premise: With the development of the network, network security has become an important topic at present. More and more companies will choose to use the firewall as the company's egress device. Compared with the router, the firewall not only has the forwarding routing function, it can also filter internal and external traffic to further enhance the security of the company's network.
Tutorial topology:
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Tags: cal enhancement packet share image share access Cisco virtual SRCVLAN, the virtual LAN (Virtul local area network), the VLAN divides the physical connected LAN logic into different virtual networks, its existence can reduce the broadcast domain, enhance the network security and convenient and flexible networking, adding PCs and switchesBy configuring VLANs, you can implement PC1 and PC2 that are connected to the same switch and cannot communicat
ObjectiveLearning Network knowledge of the students have heard or used the network device Simulator, network equipment simulator known to have Huawei's ENSP, Third HCl and Cisco PACKET TRACER, Cisco's simulator with a simple operation interface, Easy to install and use and a variety of easy to work can win a lot of network engineers and students praise. Because I am short-sighted, I will be the most basic level of operation, the shortcomings are also
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
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