Anyone with a network background might be interested in this blog post. There is no code analysis, only a brief introduction to the interfaces and their usage on Linux. In this post, I will give a brief introduction to all commonly used virtual network interface types. Linux has rich virtual networking capabilities that are used as basis for hosting VMs and containers, as well as cloud environments. Your Mac will start sharing your iPhone’s Personal Hotspot over the Ethernet, and you can connect the Ethernet cable from your Mac, to the. Plug the cable into a Internet at one end (this could be in a wall or a floor-mounted connection) Make sure the Internet is switched on Now connect the wire into the Ethernet port in your Mac.No need to check the second box. Go to the 'Sharing' tab and check the top box, then choose 'Local Area Connection' from the drop down below. Go to Sharing.Right-click on the icon that represents your wireless connection to the internet, then left-click on 'Properties'. Go to the Network connection which has internet connectivity and right click-Properties. Open Control Panel-Network and Sharing Center-Change Adapter's Setting. Go to the system which has the existing internet connection.For further details about the differences between bonding and team, see Bonding vs. For example, a team supports LACP load-balancing, NS/NA (IPV6) link monitoring, D-Bus interface, etc., which are absent in bonding. What it does is to solve the same problem using a different approach, using, for example, a lockless (RCU) TX/RX path and modular design.But there are also some functional differences between a bonded interface and a team.It is described by IETF RFC 7348.With a 24-bit segment ID, aka VXLAN Network Identifier (VNI), VXLAN allows up to 2^24 (16,777,216) virtual LANs, which is 4,096 times the VLAN capacity.VXLAN encapsulates Layer 2 frames with a VXLAN header into a UDP-IP packet, which looks like this:VXLAN is typically deployed in data centers on virtualized hosts, which may be spread across multiple racks.# ip link add vx0 type vxlan id 100 local 1.1.1.1 remote 2.2.2.2 dev eth0 dstport 4789For reference, you can read the VXLAN kernel documentation or this VXLAN introduction.With VLAN, you can create multiple interfaces on top of a single one and filter packages based on a VLAN tag. The topology looks like this:Note: When configuring a VLAN, you need to make sure the switch connected to the host is able to handle VLAN tags, for example, by setting the switch port to trunk mode.VXLAN (Virtual eXtensible Local Area Network) is a tunneling protocol designed to solve the problem of limited VLAN IDs (4,096) in IEEE 802.1q. VLANs allow network administrators to group hosts under the same switch or between different switches.Use a VLAN when you want to separate subnet in VMs, namespaces, or hosts.# ip link add link eth0 name eth0.2 type vlan id 2# ip link add link eth0 name eth0.3 type vlan id 3This adds VLAN 2 with name eth0.2 and VLAN 3 with name eth0.3. It's another failover master net device for virtualization and manages a primary ( passthru/VF device) slave net device and a standby (the original paravirtual interface) slave net device.A VLAN, aka virtual LAN, separates broadcast domains by adding tags to network packets.
Use Ethernet Port For Share Internet Mac Will StartBridge: all endpoints are directly connected to each other with a simple bridge via the physical interface.4. Either the attached switch needs to support hairpin mode or there must be a TCP/IP router forwarding the packets in order to allow communication.3. VEPA: data from one MACVLAN instance to the other on the same physical interface is transmitted over the physical interface. Private: doesn't allow communication between MACVLAN instances on the same physical interface, even if the external switch supports hairpin mode.2. Snes emulator mac os x mavericksIf one of the following situations defines your use case then you can choose to use ipvlan -(a) The Linux host that is connected to the external switch / router has policy configured that allows only one mac per port.(b) No of virtual devices created on a master exceed the mac capacity and puts the NIC in promiscuous mode and degraded performance is a concern.(c) If the slave device is to be put into the hostile / untrusted network namespace where L2 on the slave could be changed / misused."# ip link add name ipvl0 link eth0 type ipvlan mode l2This creates an IPVLAN device named ipvl0 with mode L2, assigned to namespace ns0.MACVTAP/IPVTAP is a new device driver meant to simplify virtualized bridged networking. The parent interface looks like a bridge or switch.In IPVLAN L3 mode, the parent interface acts like a router and packets are routed between endpoints, which gives better scalability.Regarding when to use an IPVLAN, the IPVLAN kernel documentation says that MACVLAN and IPVLAN "are very similar in many regards and the specific use case could very well define which device to choose. IPVLAN L2 mode acts like a MACVLAN in bridge mode. Bridge mode is the most commonly used.Use a MACVLAN when you want to connect directly to a physical network from containers.# ip link add macvlan1 link eth0 type macvlan mode bridge# ip link add macvlan2 link eth0 type macvlan mode bridgeThis creates two new MACVLAN devices in bridge mode and assigns these two devices to two different namespaces.IPVLAN is similar to MACVLAN with the difference being that the endpoints have the same MAC address.IPVLAN supports L2 and L3 mode. Please see the commit message.The type is chosen according to different needs. Source: the source mode is used to filter traffic based on a list of allowed source MAC addresses to create MAC-based VLAN associations. The MACsec headers look like this:The main use case for MACsec is to secure all messages on a standard LAN including ARP, NS, and DHCP messages. Similar to IPsec, as a layer 2 specification, MACsec can protect not only IP traffic but also ARP, neighbor discovery, and DHCP. The difference between MACVTAP and IPVTAP is same as with MACVLAN/IPVLAN.# ip link add link eth0 name macvtap0 type macvtapMACsec (Media Access Control Security) is an IEEE standard for security in wired Ethernet LANs.
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