Ideally I would like to have multiple devices connected via ethernet. I have a gigabit desktop switch and I was wondering whether that had its own MAC address so I could subvert the single ethernet connected device restriction. Does it have its own MAC address or does the network still see the individual MAC. An Ethernet Hub connects broadcasts signals to computers within a Local Area Network (LAN) through a process called frame flooding, also known as unicast. It is like one big blast. A Hub does not differentiate between MAC addresses, and indeed cannot. It does not have the software required to.
An Ethernet switch connects a number of Ethernet stations, forming an Ethernet network. Different ports of the switch can be connected to different network segments or individual nodes. The switch learns the MAC addresses observed from frames received through each port and uses this information to forward incoming frames only to the intended destination instead of flooding the network.
The Ethernet switch core is typically integrated into a device allowing for connection with a host processor which operates system management functions and implements higher layer data and protocol processing. The switching function takes care on passing frames on or bypassing the node for traffic not relevant to the local device.
The Ethernet Switch core integrates 10/100/1000 Ethernet MACs allowing direct connection to external PHY devices through standard interfaces like MII or GMII or their pin-reduced serial variants. One dedicated port offers an packet interface e.g. AXI4S for integration into any system environment.
For precise time synchronization applications, the switch and MAC functions support frame timestamping and IEEE 1588v2 correction field updates. A dedicated adjustable timer module is integrated that can be used to provide precise timestamps and system time to the application.
Ethernet Switch Eplan Macro
Enhancements for Time-Sensitive Networking.
Main Features
- Hardware timestamping on line ports with 1-step update support allowing IEEE 1588 or other protocol implementations for clock synchronization.
- Output queues with time based and bandwidth or event based gating and traffic shaping capabilities.
- Cyclic Queueing for deterministic forwarding delay
- Preemptive MAC function
- Network Reliability with Monitoring and Policing functions on a per-Stream basis
- Redundancy functions using frame duplication.
Enhancements for Industrial Networks support.
Main Features
- Integrated HUB emulation allowing use with Half-Duplex Powerlink infrastructures.
- Profinet RT and iRT infrastructures with cyclic bandwidth allocation.
- Device Level Ring (DLR) beacon forwarding without need for local processor intervention (CPU load reduction).
- Cut-Through forwarding.
The ability to switch between different sets of network settings (locations) can be useful in circumstances such as these:
- You use the same type of network (such as Ethernet) at work and at home, but the settings you use at work don't allow your Mac to automatically connect to the same type of network at home.
- Your Mac connects to more than one type of network service (such as both Wi-Fi and Ethernet) at work and at home, but at work you want your Mac to try connecting to the Ethernet network first, and at home you want your Mac to try connecting to the Wi-Fi network first. In other words, you want to set a different service order for each location.
- Your Mac isn't connecting to your network and you want to quickly reset your network settings for testing purposes, without losing your current network settings.
In each of these examples, the Location feature of Network preferences can help.
How to add or remove a network location
- Choose Apple menu () > System Preferences, then click Network.
- The Location pop-up menu shows the name of your currently selected set of network settings. The default location is named Automatic. Choose Edit Locations from this menu.
- Click the Add (+) button below the list of locations, then type a name for the new location, such as Work or Home or Mobile. (To remove a location, use the Remove (–) button below the list.)
- Click Done. The Location menu should now show the name of your new location. Any changes you now make to your Wi-Fi, Ethernet, or other network settings will be saved to that location when you click Apply. The network settings in your previous location remain as you left them, so you can use the Location menu to switch back at any time.
- Click Apply to save your settings and complete the switch from the previous location to the new one. Your Mac then automatically tries to determine the correct settings for each type of network. If you need to change the settings manually, remember to click Apply again after making your changes.
![For For](/uploads/1/2/5/8/125857790/624825569.png)
How to switch between network locations
If you have more than one location, you can use either of these methods to switch between them:
- Use the Location pop-up menu in Network preferences, as described above. Remember to click Apply after choosing a location.
- Or choose Apple menu > Location from the menu bar, then choose your location from the submenu.
How to change the network service order
If you're using network locations because you want each location to prefer a different network service (such as Wi-Fi or Ethernet) when connecting, follow these steps to change the service order (also known as port priority) in each location.
- Choose Apple menu > System Preferences, then click Network.
- Use the Location menu to choose the location you want to modify.
- Click below the list of services, then choose Set Service Order.
- Drag services within the list to change their order. Your Mac will try to connect to the service at the top of the list first, then continue in descending order until a connection is successful.
Virtual private network (VPN) connections can't be reordered, because they always take priority over other connections. - Click OK, then click Apply to make the updated service order active.
How to prevent a network service from being used
Mac Ethernet Cable
By default, the location named Automatic makes all available network services (also known as ports or network interfaces) active, whether or not they are being used to connect to a network. Your Mac automatically searches these services for a network or Internet connection. For example, you might use a Wi-Fi network at home but an Ethernet network at work. Your Mac automatically detects which of these network services to use when it connects.
Ethernet Switch Mac Address Learning
If you want to make sure that your Mac doesn't use a particular network service, such as Wi-Fi, you can make that service inactive in any of your network locations:
- Choose Apple menu > System Preferences, then click Network.
- Use the Location menu to choose the location you want to modify.
- Click below of the list of services, then choose Make Service Inactive.
- Click Apply.