vlans and trunks

This article mainly introduces how to use an independent VLAN. In this article, the author introduces several standards to help you determine when to use an independent VLAN. I hope this article will help you. You can set up a firewall in front of a vro or set up a firewall in front of the system. Either method requires an IPSec rule or an operating system firewall (such as a Windows Firewall ). Another way to protect the security zone is to directly establish a completely independent VLAN. Fr

This technology is also the result of recent experiments, in the habit of archiving to record the method. If not, please correct me!!Go to the Chase:Requirements, configure two VLANs to make them non-pass.The requirements are simple, but we have to learn to use simple experiments to learn about complex environment configurations.The VLAN is interoperable by default because of the current switch. So here we use the ACL policy to implement.Let's start w

By default, only hosts in the same VLAN can communicate. To achieve communication between VLANs, a third-tier network device is required.1, external router:VLAN communication can be achieved using an external router that has a connection to each VLAN on the switch; The external router can use a trunk to connect to the switch, which connects all the necessary VLANs.2, Internal router:The approach is in the f

OverviewThe network is configured with Vlan,vlan to isolate the broadcast, while the DHCP protocol uses broadcast, that is, by default the DHCP protocol can only be used within the VLAN, the DHCP server in VLAN30, only the client in VLAN30 can obtain the IP address from the DHCP server. What if the client of VLAN 2 or VLAN 3 also needs to get an IP address from this DHCP server?Solution Ideas1, to install a DHCP server for each network segment, but this way there is a waste of resources, and is

that the user's physical location has changed, and there is no need to reconfigure the corresponding VLAN, and VLAN can be divided according to the protocol type, which is very important for network managers, this method does not require additional frame tags to identify VLANs, which can reduce network traffic. Its disadvantage is its low efficiency because it takes processing time to check the network layer address of each packet (compared with the

In the previous section we learned the principle of Neutron Vlan Network, and today we discuss how to enable it in the ML2 configuration.The VLAN network related parameters are set first in/etc/neutron/plugins/ml2/ml2_conf.ini. Tenant_network_types = VLAN Specifies that a normal user creates a network type of VLAN.Then specify the range of VLANs:The above configuration defines the range of VLAN Network,vlan IDs for which label "default" is 3001-4000. This range is for ordinary user

Different switches can communicate with the same VLAN, but different VLANs cannot. I, Vswitch Port6) switchport access vlan 100 -- allocate the port to the vlan 7) Likewise, add the two vswitch-related ports to the VLAN 100 that has been connected in a serial connection. 8) enter port f0/10 of the two switches and configure the trunk command: switchport mode trunk. Iv. Deployment Solution 2 Note: These two implementation methods are not recommen

The same vlan of the same vswitch can communicate with each other, and different VLANs cannot communicate with each other. I, Ii. IP planning PC0: 192.168.0.100 255.255.255.0PC1: 192.168.0.110 255.255.255.0PC2: 192.168.0.120 255.255.255.0Laptop0: 192.168.0.200 255.255.255.0Laptop0: 192.168.0.210 255.255.255.0 3. Procedure 1) enable -- enter privileged Mode2) conf t -- enter global configuration mode3) vlan 100 -- create a vlan4) name required wei_u

How to use a vro to connect different VLANs of a single-layer switch Some simple configurations of the experiment First configure PC PC1 IP: 192.168.1.1 subnet mask: 255.255.255.0 Gateway: 192.168.1.254 PC2 IP: 192.168.1.2 subnet mask: 255.255.255.0 Gateway: 192.168.1.254 PC3 IP: 192.168.2.1 subnet mask: 255.255.255.0 Gateway: 192.168.2.254 PC4 IP: 192.168.2.2 subnet mask: 255.255.255.0 Gateway: 192.168.2.254 PC1 and switch SW1 ports f0/1 PC2 and swit

Topology diagram:The command to use:VLAN to the portSwitch to System mode System-viewswitch name sysname swj1Create VLAN 3Port mode Select int G0/0/3 computer must accessPort Link-type AccessPut the port in VLAN port default VLAN 3Port Gigabitethernet 0/0/1VLAN between the two switchesEnter the port of the link switch int G0/0/2Setting trunk port Link-type Trunk for portsSet VLAN port trunk allow-pass VLAN 3 that can be passed on this portSet IP to PortEnter: VLAN Int VLAN 3Set IP:IP address 192

Switch#conf TSwitch (config) #no IP domain-lookupSwitch#vlan DatabaseSwitch (VLAN) #vlan 2Switch (VLAN) #vlan 3Switch (config) #int VLAN 2Switch (config-if) #ip address 192.168.2.1 255.255.255.0Switch (config-if) #no shutdownSwitch (config) #int VLAN 3Switch (config-if) #ip address 192.168.3.1 255.255.255.0Switch (config-if) #no shutdownSwitch (config) #interface fastethernet 0/24Switch (config-if) #switchport trunk Encapsulation dot1q--Cisco Configuration Trunk Encapsulation ISL or 802.1Q or au

In the work process, users sometimes require one-way access between two VLANs. The following describes how to configure one-way access. Reflexive ACLs The reverse ACL is introduced in Cisco IOS Release 11.3. it can only be defined with the extended named ip acl, but not with the number-based or standard ACL and other protocols. syntax:Ip access-list extended Ip access-list extended Interface Ip access-group {number | name} {in | out}　One-way access t

(a) How to use the Web page to row VLAN? Preparation tools: Materials Number Cable 1 Root Managed switches (with power cords) 1 units PC PC 1 units IE Browser (any browser can) Null No more nonsense, just get ready for the tools. Step One: Network cable, a computer connected to the other end of the switch.Step Two: Open the browser, enter:192.16,8.1.200 o

Original intention:I built a DHCP server on top of CentOS, because the DHCP request sent by the client was tagged, in order for DHCP server to properly response the IP of the client one address pool.DHCP ETH port is eth0Realize:Add in/etc/rc.localVconfig Add eth0 1002Ifconfig eth0.1002 90.0.0.1 upDescriptionLinux boot, load the kernel, and then load the Inittab file, Inittab file has an entry Si::sysinit:/etc/rc.d/rc.sysinit specify the next file to be loaded Rc.sysinit, after the file is loaded

a virtual interface, the default all interfaces belong to this VLAN, so no matter from which port access to the switch, you can connect to the switch remotely, provided that the configuration IP address can be related to the password. From this point we can analyze that we only need to open the relevant VLAN on the three-tier switch and configure the IP address, which belongs to all the gateways of the host within that VLAN. Three-tier switching configuration 1. Turn on routing function Swit

of the iOS simulator configuration, 3640 analog into three-tier switches, modules using 16-Port Fast Ethernet ports The second part is the 2003 configuration on the VM, requiring a single DC to integrate the DNS service, and the installation of DHCP for four different VLAN clients to assign IP addresses belonging to different subnets. 1. First configure the Switch VLAN, increase the VLAN 2. Configure different interfaces to separate VLANs 3. Conf

Use Access mode for interoperability with VLANsDisplay MAC address VLAN 10View VLAN10 MAC Address TableDisplay MAC Address Aging TimeView MAC address Survival timeDisplay VLANView VLAN and port correspondence above the switchDisplay Port VLANView the mode of the port on the switch and the VLAN correspondenceUndo the log on the terminal displayInteroperability with VLANsSW1 settingsEnter system view to join VLAN 10[Sw1]vlan 10Enter interface[Sw1]interface GIG0/0/1Port connection type is access mo

server and the client are in the same network segment and are not DHCP relay agents, for Cisco's DHCP In the case of a server, if a request packet with Option82 is received, it is considered a request message from a DHCP relay agent, and the Giaddr field of the message is checked, but because it belongs to the same network segment, the field is 0.0.0.0 DHCP. The server will consider an illegal address, and this message will be discarded, causing the client to obtain no IP address(iv) Cisco DHCP

=" No Ip.png "alt=" 7a9826368f1e95392fd5809653251199.png-wh_ "/>PC1 use DHCP to obtain an IP address:650) this.width=650; "Src=" Https://s2.51cto.com/oss/201711/14/eb831063663dcffee8b41ec98e89e157.png-wh_500x0-wm_3 -wmp_4-s_911661480.png "style=" Float:none; "title=" Request Ip.png "alt=, Eb831063663dcffee8b41ec98e89e157.png-wh_"/>PC1 successfully acquired the IP address:650) this.width=650; "Src=" Https://s5.51cto.com/oss/201711/14/84b55b0ad18413bc9411eac0255ab151.png-wh_500x0-wm_3 -wmp_4-s_308

, configure router R2Outer>enableRouter#config TerminalRouter (config) #hostname R2Router (config) #int g0/0Router (config-if) #ip add 192.168.3.2 255.255.255.0Router (config-if) #no shutdownRouter (config) #int G0/1Router (config-if) #ip add 192.168.4.254 255.255.255.0Router (config-if) #no shutdownFive, configure the next hop to routeR1 (config) #ip Route 192.168.4.0 255.255.255.0 192.168.3.2R2 (config) #ip Route 0.0.0.0 0.0.0.0 192.168.3.1Six, repeater configurationR1 (config) #int VLAN 10R1