vlans and trunks

registration protocol, which is applied to GVRP and GMRP ◆ There are five GARP messages: join in, leave, empty, join empty, and leave all. ◆ GVRP is a dynamic VLAN Registration Protocol and is enabled as gvrp. ◆ GVRP is divided into three categories: normal allows dynamic vlan creation, registration, and logout. Fixed allows you to manually create and register VLANs to prevent vlan cancellation and other interfaces from registering

1. Networking requirements: 1. switchA and SwitchB use trunk for interconnection. Mutual access is allowed between PCs with the same VLAN. Mutual access is prohibited between PCs with different VLANs. PC1 and PC2 are located in different VLANs. You can set the IP address of VLAN Interface 10 of the SwitchB layer-3 Switch to 10.1.1.254/24, when the IP address of VLAN 20 is 255.1.1.254/24, mutual access betwe

external vlan networks can communicate with different VM hosts on the node, devices connected through the eth0 interface need to obtain addresses of different network segments based on different VLANs. To process packets of vlan1 and vlan2, The eth0 interface uses the vconfig tool to create virtual interfaces of eth0.1 and eth0.2, bridge with the VM's tap port, and then enable the DHCP Server service through interface binding on each bridge interface

650) this.width=650; "Src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20161103-1478177731810020509.jpg "/>In addition to the network of local, flat, and VLANs discussed earlier, OpenStack supports both the Vxlan and GRE overlay networks.Overlay network refers to networks that are built on other networks. The nodes in the network can be thought of as being connected through a virtual (or logical) link. The overlay network may consist

broadcast. In a shared network, a physical network segment is a broadcast domain. In a switched network, a broadcast domain can be a virtual network segment consisting of any Layer 2 network address (MAC address) selected. In this way, the division of working groups in the network can break through the geographic location restrictions in the shared network, but is completely divided according to the management function. This workflow-based grouping mode greatly improves the management functions

addresses. If it is not in this set, it will be discarded. You can also configure the maximum number of recognizable MAC addresses for the switch port. If the number is within the range, you will learn by yourself. If the number is exceeded, you will discard it. ARP Inspection You can specify a mapping from the default gateway to its MAC address. If the switch finds that the ARP ing relationship in an ARP packet is incorrect, it will be discarded to solve the ARP spoofing attack. Set se

efficiency of packet forwarding. A layer-3 Switch uses a hardware exchange mechanism to implement the IP routing function. Its Optimized Routing software improves the routing efficiency and solves the routing speed problem of the traditional router software. Therefore, it can be said that layer-3 switches have "vro functions and vswitch performance ". 2. layer-3 switching is indispensable for connecting subnets If the number of computers on the same network exceeds a certain number (usual

domain com set vtp management domain name comCom (vlan) # vtp server sets the switch to the server modePar1 # Switch vlan database to vlan configuration modePar1 (vlan) # Set vtp domain comPar1 (vlan) # vtp client sets the switch to the client ModePar2 # Switch vlan database to vlan configuration modePar2 (vlan) # Set vtp domain comPar2 (vlan) # vtp client sets the switch to the client ModePar3 # Switch vlan database to vlan configuration modePar3 (vlan) # Set vtp domain comPar3 (vlan) # vtp cl

, which is limited to a limited Linux release version. It is difficult to configure and is not recommended for FlatDHCP. Advantages: the configuration is relatively simple. The standard network protocol can be used in any operating system. Disadvantages: You need to have your own DHCP broadcast domain VlanManager. Advantages: each tenant can be isolated from its own VLAn. Disadvantages: complicated configurations, you need to have your own DHCP broadcast domain. You need to configure transmissio

Currently, virtualization is widely used. Generally, a physical host can create multiple virtual machines on a physical host after installing VMware ESXi or Hyper-V Virtual Machine Software, in addition, each created virtual machine can provide external services like the original physical machine, which can undoubtedly make full use of server resources to save power and space. But when most of our friends use virtual machines, there is also a problem: the physical host performance is high enough

What is overlay network1. One packet (or frame) is encapsulated within another packet, and the encapsulated packet is forwarded to the tunnel endpoint before being disassembled.2. Overlay network is the use of this so-called "package in the bag" technology to securely hide one network in another network, and then migrate the network segment.First, VLAN introductionVLANis the abbreviation for the English virtual local area network, the Chinese name is "VLAN", and

Any successful person is standing on the shoulders of giants to succeed, and I have not succeeded, and then I excerpt from an article and add some of their own experience to write about the VLAN, trunk and hybrid the difference:Ethernet ports have 3 types of links: access, trunk, HybirdAn access type port can only belong to 1 VLANs for connecting to a computer port;Trunk type port can allow multiple VLANs t

, all ports are included in the source address table (SAT. This table is used for the switch to forward frames to the appropriate L2 port according to the target MAC address. After a VLAN is introduced, the source address table maps the port to the MAC address according to the VLAN, so that the switch can make more advanced forwarding decisions. The show mac address table and show vlan commands are displayed. All ports (FA0/1-FA0/24) are in VLAN 1. Another common topology is that two switches

) # vtp domain com sets vtp management domain name com (vlan) # vtp server set vswitch to server mode par1 # vlan database enters vlan configuration mode par1 (vlan) # vtp domain com set vtp management domain name com par1 (vlan) # vtp client set vswitch to client mode par2 # vlan database enters vlan configuration mode par2 (vlan) # vtp domain com set vtp management domain name com par2 (vlan) # vtp client set vswitch to client mode par3 # vlan database enters vlan configuration mode par3 (vlan

virtual network adapter, and then sends the packets to the external physical network through the physical network adapter. Usually we need to configure the Virtual Machine network adapter: network connection, MAC address, VLAN, such: Virtual LAN (VLAN) Hyper-V supports both access and trunk. First, your network needs to support VLAN, at least your parent partition network adapter supports VLAN. The access mode is relatively simple. You only need to set the corresponding vlan id in the sub

configuration modeCom (vlan) # vtp domain com set vtp management domain name comCom (vlan) # vtp server sets the switch to the server mode Par1 # Switch vlan database to vlan configuration modePar1 (vlan) # Set vtp domain comPar1 (vlan) # vtp client sets the switch to the client Mode Par2 # Switch vlan database to vlan configuration modePar2 (vlan) # Set vtp domain comPar2 (vlan) # vtp client sets the switch to the client Mode Par3 # Switch vlan database to vlan configuration modePar3 (vl

different network equipment manufacturers, the specific QoS features can be significantly different. Taking the enterprise-level Gigabit Switch Switch4007 of 3Com as an example, we briefly discuss how to enhance VLAN security based on the QoS features of this Gigabit Switch. Develop access control policies between VLANs A typical campus network environment generally divides VLANs according to different bus

NetScaler VLAN ' s demystifiedhttps://www.citrix.com/blogs/2014/12/29/netscaler-vlans-demystified/The Citrix NetScaler Appliance is an amazingly flexible application Delivery controller (ADC). It ' s capable of performing both simple and very complex tasks, positioning it solidly for the eighth consecutive year in T He Gartner leaders Quadrant for ADC ' s:http://www.citrix.com/news/announcements/oct-2014/ Citrix-positioned-for-the-eighth-consecutive-y

End Port Type 1 Access User mode 2 Trunk Link Mode 3 hybrid mode (similar to trunk but higher than trunk) Two ports Introduction 2.1 Access Type port: Allow only the default VLAN Ethernet frames, that is, only one vlan,access port after receiving the Ethernet frame to the VLAN tag, forwarding in the Split VLAN label, generally connected to the end of the computer. 2.2 Trunk Type port: You can allow multiple VLANs to pass, messages that can accept and

the abnormal flow and avoid the network jam. Anti-DDoS Once the enterprise network is subjected to large-scale distributed denial of service attacks, it will affect the normal network use of a large number of users, and even cause network paralysis, which is the most troublesome attack of service providers. Security switches use specialized technology to protect against DDoS attacks, which can intelligently detect and block malicious traffic without impacting the normal business, thereby prev