1. VLAN: Virtual LAN, is the logical combination of switch ports, VLAN work in the second layer of OSI, a VLAN is a broadcast domain, the communication between the VLAN is through the 3rd layer of routers to complete.
2. VLAN Advantages:
Broadcast problem of 1> control net
VLAN generation mainly to the design of local area network increased flexibility, so that network administrators in the division team, no longer limited by the user's physical location. VLANs can be implemented on one switch, or across switches. It can be divided according to the location, function or department of the network user.
VLAN features flexibility and scalability, and using
Cisco router configuration manual Virtual LAN (VLAN) routing 1. The main network technology we currently use when constructing an enterprise network is generally based on exchange and virtual networks. The exchange technology changes shared media to exclusive media, greatly improving the network speed. The Virtual Network Technology breaks the restrictions of the geographical environment. without changing the physical connection of the network, the wo
1. First create a VLANSwitch> enable to enter System ModeSwitch # configure terminal enters the configuration statusSwitch (config) # create a VLAN 2Switch (config-VLAN) # name jisuanji: jisuanjiInterface range fastethernet0/1-10 Select Port 1-10Switchport access VLAN 2 adds Port 1-10 to V2.
/*
No VLAN 10 Delete
VLAN-based DHCP address pool implementation in OVS, ovsvlandhcp
Preface
VLAN, as a virtual LAN technology, plays an important role in switch networking management and cloud computing platform network services, especially in the current Virtual Switching OVS, VLAN applications are more flexible and important. For the basic usage of
Objective
Docker as the hottest lightweight container technology at present, there are many commendable features, such as Docker mirroring management. However, Docker also has many imperfect places, the network aspect is the Docker relatively weak part. Therefore, it is necessary for us to have an in-depth understanding of Docker's network knowledge to meet the higher network requirements.
Docker Network mode selection
At present, many articles have introduced the network model of Docker, but
We know that the DHCP service is not able to work in multiple VLANs, so by default, DHCP and VLANs cannot coexist, and the broadcast information emitted by DHCP clients cannot be broadcast across multiple VLANs, and when the client is dispersed across multiple VLANs, Broadcast data failed to send because the client could not be found. How to solve this problem? Configuring a DHCP server for each VLAN is the easiest way to do it, but it's less efficien
Two vswitch configuration modes: Configure VLAN Based on port division as an example.
Vswitch configuration modes can be divided into two categories: one is the configuration mode represented by a CISCO switch, and the other is the configuration mode represented by a Huawei or H3C switch. In fact, the two configuration modes are not essentially different, but the command names and configuration methods are different. If you grasp the basic principles
Note: switchport mode trunk can run directly on the 2950 switch, which enables 802.1q directly. To enable the relay function on vswitches such as 3550 and 4500, you must first select the encapsulation method, that is, run switchport trunk encapsulation dot1q.Sw0 # vlan databaseSw0 (vlan) # vtp domain ContosoSw0 (vlan) # vtp password ContosoSw0 (
The VLAN mentioned here is a VLAN that complies with the IEEE 802.1Q standard.The frame structure is as follows:|da|sa|tag| type| date| crc|VLAN frames Add a 4byte long tag field to the source MAC address, relative to normal Ethernet frames. This field is specifically divided into:| tpid|priority| cfi| Vlan id|Tpid:tag
option is to submit only the specified name list (you can use show Security acl ip name editbuffer to view control entries not submitted to the content in the editing buffer ), the all option is used to submit all unwritten vacls.3. Map to VLANBoth vacl and ACL must be mapped to the target object after submission, for example, interface vlan1 // ip access-group 101 out: apply access-list 101 to the out direction of the vlan1 interface. 101 indicates the ACL number and is associated with the cor
Tag: mode command using log ENC Global relay name configurationSwitch interface type:
Access: Access mode, PC via switch internet this way
Trunk: Trunk mode, inter-switch connection in this way
Switch VLAN creation mode:
Database configuration mode
Global configuration Mode
Database configuration mode: - name Vlan20 (VLAN name optional) switch (
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
VLAN is a virtual network, VLAN is divided into three ways: based on port, based on MAC address and ip-based address. In practical applications, the role of virtual network is similar to the division of different working groups, that is, the virtual network can not directly communicate with each other, but must be forwarded through the router, which to some extent improve the security performance of the ent
H3C S3100 Switch configuration VLAN
I. Basic settings
1. the console line is successfully connected.
2. Enter System Mode
3. Change the device name
[H3C] sysname TEST
4. view all configuration information
[H3C] display current-configuration // display this is to view the device information in the current path
5. Create and enter VLAN 10
[H3C] vlan
Role of the switch serial port (Trunk:
The following two encapsulation types can be used for relay over Ethernet through the serial port of the switch:
-IEEE 802.1Q
-ISL (Inter Switch Link, Cisco private)
Procedure
Step 1: Add a VLAN to the vswitch
Switch1 # vlan database
Switch1 (vlan) # vlan 2
Switch1 (
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