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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

It is very important for Cisco router users to learn about commands for password recovery of Cisco routers. For many beginners, the ROM Monitor of Cisco routers is often unfamiliar or even daunting for a simple reason, first, we do not often use this mode and are not familiar with its related operations; second, Operation errors in ROM Monitor mode, it often caus

Currently, Cisco routers have become a leader in the routing industry. Many people may not understand the configuration steps of Cisco routers. 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. The company is headquartered in Beijing and has three branches nationwide. It is required that data in four locations be queried i

Cisco ASR 5000 PMIPv6 Denial of Service Vulnerability (CVE-2015-6340)Cisco ASR 5000 PMIPv6 Denial of Service Vulnerability (CVE-2015-6340) Release date:Updated on:Affected Systems: Cisco ASR 5000 19.0.M0.60737 Description: CVE (CAN) ID: CVE-2015-6340The Cisco ASR 5000 series is a carrier-level platform for deploy

Cisco NX-OS Software Denial of Service Vulnerability (CVE-2015-6260)Cisco NX-OS Software Denial of Service Vulnerability (CVE-2015-6260) Release date:Updated on:Affected Systems: Cisco Nexus 6000Cisco Nexus 5600Cisco Nexus 5500 Description: CVE (CAN) ID: CVE-2015-6260Cisco NX-OS is a data center-Level Operating System.The

Cisco Prime Infrastructure XXE Denial of Service Vulnerability (CVE-2016-1358)Cisco Prime Infrastructure XXE Denial of Service Vulnerability (CVE-2016-1358) Release date:Updated on:Affected Systems: Cisco Prime Infrastructure 3.1 (0.0)Cisco Prime Infrastructure 3.0Cisco Prime Infrastructure 2.2 Description: CVE (

Cisco asa dns memory depletion Vulnerability (CVE-2015-0676)Cisco asa dns memory depletion Vulnerability (CVE-2015-0676) Release date:Updated on:Affected Systems: Cisco ASA 1, 5500 Description: CVE (CAN) ID: CVE-2015-0676The Cisco ASA 5500 Series Adaptive Security Device is a modular platform for providing securi

Cisco asa vpn xml Parser Denial of Service Vulnerability (CVE-2015-0677)Cisco asa vpn xml Parser Denial of Service Vulnerability (CVE-2015-0677) Release date:Updated on:Affected Systems: Cisco ASA 1, 5500 Description: CVE (CAN) ID: CVE-2015-0677The Cisco ASA 5500 Series Adaptive Security Device is a modular platf

In addition to address binding, ARP configurations of Cisco routers are getting more and more attention. Therefore, we will discuss two aspects here. It seems a bit messy, but I hope it will help you. I know that the command for binding the IP address of the cisco router to the mac address is arp IP address, mac address, arpa, but I think there should be a command that shows the start binding command. for e

Single-user Cisco ProductsSome products of the SOHO series use dial-up technology, such as ISDN Integrated Service data network, which allows users to roam from one place to another, or dial to the central site.The Cisco200 series for ISDN has gradually withdrawn from the market. We recommend that you upgrade it to the 700 series. The 600 series can be used with digital user line DSL) interfaces. The 800 Series features more than the 700 series, espec

There are many knowledge about Cisco routers. Here we mainly analyze the specific methods for Cisco router configuration. Have you ever encountered this problem in daily network management and maintenance: You have been forcibly rejected by a vro or vswitch, a former "friend", because you forgot your password, parameter resetting and information statistics are not allowed. The following describes how to cle

Cisco AP 1200 Upgrade iOSFirst open the Cisco TFTP tool, then connect the console line, reboot into: mode,AP:?To see if the SET command is supported, it is generally supported and then configured as follows, similar to the routerConfigure IP Addressap:set ip_addr 1.1.1.1 (Configure AP Local address)Ap:set NETMASK 255.255.255.0Ap:set Default_router 1.1.1.2 (tftp address)Ap:tftp_initAp:Boot=tftp://1.1.1.2/c12

Subnet Mask hardware basic Ethernet protocol Network Management A router is a bridge of a computer network and a core device connecting to an IP network. It can connect different networks, select data transmission routes, and block unauthorized access. Router configuration is not easy for beginners. Take the Cisco router as an example to introduce the general knowledge and configuration of the router for your reference When configuring the ro

In the real world or laboratory environment, Cisco IOS test commands are very useful and powerful commands. Learn the basic usage of this command and learn a few useful sub-commands. This is not surprising if you have never used the Cisco IOS test command. I have met many network administrators who have never heard of this command. Based on my experience, this test is a very useful and powerful command in b

This article describes in detail how to improve OSPF security for Cisco routers. This article describes how to improve network security in terms of protocol analysis and router authentication solutions. OSPF is also an open version of The Link Status Protocol. In practice, OSPF is often used in some large and hybrid networks. In the previous article, I talked about the defects of the RIP Protocol. The reason why network experts develop the OSPF protoc

Hello everyone, the recent development of Huawei is very good, especially in the domestic to Cisco's strategy, many friends will ask me a question, I should go to learn Cisco or to learn Huawei?Let me take this opportunity to discuss with you.Just from the direction of the routing switch (Cisco is called Rs direction, Huawei called the digital direction), technically speaking, the difference is not very lar

In CISCO router products, we usually need to restrict the access of general users during initial configuration. This is very important for Routers. By default, Our routers are an open system and the access control options are all disabled, any user can log on to the device to initiate further attacks, therefore, our network administrator needs to configure a password to restrict unauthorized users from accessing devices through direct connections, CON