cisco opendns

; (CatOS) display VTP domain and VTP Mode Show vtp status; (IOS) Show interface; (CatOS) display Management interface Information Show port; (CatOS) displays brief information about each port (number, VLAN, duplex ,...) Show interface; (IOS) Show trunk; (CatOS) displays the relay information (mode, encapsulation, allowed port, cropping ,...) Show interface trunk; (IOS) Show spantree 45; (CatOS) shows the STP mode, type, status, speed port,...) of the port ,...) Show spanning-tree 45; (IOS) 3. In

Cisco routers are the leader in the routing industry. Their product quality is still very good. Cisco Wireless AP is also one of Cisco's most important products. Requirement Overview: A Cisco Wireless AP is used to build an enterprise wireless LAN. A user's notebook can log on to the wireless network without adding an AD domain. the user name and password of the

I would like to introduce you to the Cisco Wireless Router setting method. Many people may not know how to optimize the Cisco wireless router settings. It does not matter. After reading this article, you will certainly have a lot of GAINS, I hope this article will teach you more things. I. Basic Cisco wireless router settings: First, I collected the original text

Many friends who use the Cisco router module have encountered many problems during use. Below are some basic solutions. More or less can solve some small problems. Problem description: The Cisco router module does not turn on the light, and does not turn on the light after it is turned on. Answer: If the module is broken, I have encountered this situation. Check if you recognize this

This tutorial describes how to start and configure Cisco Catalyst 1900 series switches.1. Tutorial PurposeThrough this experiment, you can master the following skills:Familiar with switch startup interface;Configure the vswitch;Understand the port number of the vswitch.2. device requirementsThis experiment requires the following devices:One Cisco Catalyst 1900 Series Switch with unlimited models and Enterpr

It is very important for Cisco router users to learn about how to restore their vro passwords. Here we mainly introduce two methods to help you quickly restore the vro password, when the Cisco Router password is forgotten or the enable password is lost, there are two methods to restore it, depending on the series of products you are using. The first method to restore the password of a

The Cisco router has a very high market demand. Here we mainly introduce the background of Cisco router and firewall. Firewall has become a key part of enterprise network construction. However, many users think that Cisco routers already exist in the network and some simple packet filtering functions can be implemented. So why should we use firewalls? The followi

MSTP intercommunication between Cisco and H3C switches 1. MSTP introduces the concept of "INSTANCE" INSTANCE and "REGION" REGION. An instance is a collection of multiple VLANs. In this way, you can bind multiple VLANs to an instance to save communication overhead and resource usage. "Domain" is determined by the domain name, revision level, and format selector. The relationship between VLAN and instance. The domain name, format selector, and revision

Investment Protection and Development Options With the development and changes of the Enterprise, you can leverage the Scalable Cisco stack architecture to ensure the synchronous development of your LAN. Cisco provides the industry's most flexible, scalable, and manageable stacking architecture for the Catalyst 3500 XL series and the Catalyst 2900 XL series switches with gigabit performance. You can create

VLAN database is configured, you must enter exit to save it;VLAN troubleshooting: physical connection> Switch configuration> VLAN configuration;Physical connections include CDP and duplex;The Trunk is a link between two vswitches;802.1 p: Priority of the 802.1qTAG field;Tunnel requires two tags: one for the enterprise and one for the carrier. The carrier can transmit VLAN, CDP, VTP, STP, and other information;Native VLAN is unique to 802.1q. It is vlan 1 and is used to manage VLANs;ISL will als

Configuration mode for Cisco routers Configuration mode Prompt Enter command Description User mode Route> User mode is the default mode when the router starts, provides limited access to the router, allows for non-destructive operations such as viewing the configuration parameters of the router, testing the connectivity of the router, etc., but cannot make any changes to the router configurati

After the update is completed today, a long Cisco router command is divided into three articles, which will be helpful for users to read and hope that everyone can get the result from it, I believe these articles will certainly help some people. I. Starting with the Cisco router command M:Mbranch traces the multicast address down to the terminalMedia-type defines the Media typeMetric holddown isolates the n

Cisco is the main force in the entire vswitch. Its products are doing very well in the market. The following article will detail some of the usage skills and precautions of Cisco switches, in many organizations, the core backbone switches are primarily Cisco. In the process of debugging and maintaining Cisco switches,

With the development of China's routing industry, its application is also more extensive, especially the application of routers and firewalls. Here we mainly explain the security configuration of NetEye firewall and Cisco router. Firewall has become a key part of enterprise network construction. However, many users think that Cisco routers already exist in the network and some simple packet filtering functi

Cisco NX-OS MTS Remote Denial of Service Vulnerability (CVE-2014-2201) Release date:Updated on: Affected Systems:Cisco NX-OS 4.2 (6)Cisco NX-OS 4.2 (4)Cisco NX-OS 4.2 (3)Cisco NX-OSDescription:--------------------------------------------------------------------------------Bugtraq id: 67578CVE (CAN) ID: CVE-2014-2201Cis

Release date:Updated on: Affected Systems:Cisco IOS xr4.2Cisco ios xr 4.1.2Cisco ios xr 4.1.1Cisco ios xr 4.1.0Cisco ios xr 4.0.4Cisco ios xr 4.0.3Unaffected system:Cisco ios xr 4.2.1Description:--------------------------------------------------------------------------------Bugtraq id: 53728Cve id: CVE-2012-2488 Cisco ios xr is a next-generation network and Cisco carrier routing system. Implementation Vulne

Cisco AsyncOS Denial of Service Vulnerability (CVE-2016-1382)Cisco AsyncOS Denial of Service Vulnerability (CVE-2016-1382) Release date:Updated on:Affected Systems: Cisco AsyncOS Description: CVE (CAN) ID: CVE-2016-1382The Cisco AsyncOS operating system improves the security and performance of

Maybe many people do not know the actual application of the NetEye firewall and the Cisco router. Next we mainly analyze the security problems of the NetEye firewall and the Cisco router. Firewall has become a key part of enterprise network construction. However, many users think that there are already routers in the network and some simple packet filtering functions can be implemented. So why should we use

No one liked this, but sooner or later there would be a router crash. All that should be done now is to save the key information in the router memory so as to identify the cause of the router crash and prevent this situation from happening again. To do this, you need to configure the vro to save the core dump information stored on the vro at the time of crash. Next, I will tell you what is the core dump information, what is its usefulness, and how to save these files that are very important for