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Dual Ethernet Card

Computers are increasingly connected at home and in the office, and networked computers have supplanted the old-school mainframe as a fundamental business tool. Wireless networks are inexpensive and easy to implement, but cabled Ethernet offers significantly higher throughput. The highest-performance network cards often include a pair of gigabit connections for Ethernet, offering a number of possible uses.

dual ethernet card

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Several of the highest-end gigabit Ethernet interface cards for computers include two connections. There are a number of potential uses for this configuration, depending on your enterprise's IT structure and operational needs. For example, where dual connectors are available for all computers on a given segment of your network, you can "bond" the two network interfaces. This enables your computers to view them as a single interface, using one gigabit connection to send and the other to receive. This arrangement effectively doubles your input to 2 Gbps if you're using gigabit cards, or 20 Gbps if you're using 10 GB cards. This can be useful for communicating between servers, or in other high-performance environments.

Computers with dual gigabit connections can also use them to connect simultaneously with different networks. There are a number of potential applications for this. For example, your computer could be connected simultaneously to a customer-accessible public network, and your own separate internal network. This not only improves security, it frees up all the bandwidth of your in-house network to handle your data infrastructure. In industrial applications, the second network could be constructed to control and monitor your manufacturing processes, providing efficient control of production while freeing bandwidth for the remainder of your network.

Dual gigabit Ethernet interface cards are targeted at the enterprise and other high-performance environments, and usually have a number of enhancements built in to take full advantage of the gigabit throughput. Some support the use of larger-than-normal data packets, which increase the effective throughput of your network. Others take over processing of TCP/IP network data, reducing the burden on your servers' and workstations' processors. Most have advanced buffering features to speed the card's data handling, and offer intelligent load balancing to help spread the workload between available computers.

Suitable for any standard PCI Express-enabled system, the 2-port Ethernet card supports full-duplex flow control for maximum data transfer speeds of up to 2000 Mbps - an ideal 2-port NIC for setting up dual-homed, or multi-homed host configurations providing added security to corporate networks.

The dual-port server adapter is compliant with the PCIe 2.0 standard and features support for Jumbo Frames and 802.1q VLAN tagging as well as Wake on LAN (WoL). The adapter includes an optional low-profile / half-height bracket that can be used for installation into a standard or small form-factor computer chassis.

Your expansion card is listed according to the name of the chipset. To determine the name of the chipset of your expansion card, navigate to and look on the Technical Specifications tab for your product.

Overall, this is not the most complex solution. Still, it is inexpensive and is a way to get dual 2.5GbE ports into virtually any system. With the PCIe Gen2 x1 interface and low-profile bracket, this is a very versatile form factor.

In Windows 10, the Syba dual 2.5GbE PCIe NIC was simple to set up. You plug in the adapter, and two NICs are recognized. Each NIC connects with a DHCP address. It identifies as a Realtek 2.5GbE NIC and everything works. We are not going into the Linux side since we did that in the TRENDnet review.

Overall, this is a truly plug-and-play experience. If you are using Windows 10, and have an open PCIe slot, installation requires that you can open your PC, align the card to a PCIe slot, and screw the PCIe card in (skip that if it is a tool-less PCIe chassis.) From there everything will work although you may want to upgrade to the newer Realtek driver. Still, it works out-of-the-box.

Performance is slightly lower than we would have liked to have seen here. When we tested either NIC alone, the performance was close to the single port Realtek solutions we have tested. When we put both NICs under load, we see less than a 2x performance increase. This may be due to heat or the PCIe topology. Still, there is a large performance increase with a dual-port solution.

Price-wise, these are extremely reasonable. In fact, it is around the same price as the TRENDnet TEG-25GECTX single port adapter. Since both cards use the same NICs, just the Syba unit has two NICs, this may be a better deal even if one had to spend a few dollars on heatsinks to match the feature on the TEG-25GECTX. It is also a lower cost per port item than the single port option.

Overall, this is a card that we really like. Performance is good, albeit not absolutely perfect. For the price, it is great. Syba made the card easy to deploy with the PCIe Gen2 x1 interface and full height/ low profile bracket options.

25GigE SFP28 PCIe Gen3 x8 dual-port smart NIC with front panel 5V TTL input trigger port. The PH-25-DUAL is part of a series of progressively more powerful PC peripherals intended to allow customers to get the most out of their Emergent ultra-high-speed cameras for the widest range of applications.

I have a PC with a lot of harddisks and I would like to access to these disks from an other machine. I know alredy, that 2 ethernet cards can be connected directly, using a special crossover cable.The only limitation is, the other machine has only some of the old PCI slots free. (The PCI-express slots are alredy in use.) My idea is to buy 2 dual port gigabit ethernet cards (like the ZEXMTE Gigabit Ethernet PCI)so i could have 2Gbit/sec transfer rates, which is enough for me.(There are alredy 10Gbit ethernet cards on the market, but they all use PCI-express and not the old PCI interface.)

100GigE QSFP28 dual port PCIe Gen4 x16 smart NIC with front panel 5V TTL input trigger port. This card is part of a series of progressively more powerful PC peripherals intended to allow customers to get the most out of their Emergent ultra-high-speed cameras for the widest range of applications.

Hi there,i have installed two ethernet cards in one machine, because one is using for different IP scheme which is connected to another network and fortigate vpn work on it all the IP are configure on it properly and two dns as well and other one is for local network in which i have configured only ip address, subnet mask, and dns server. but as far as i connect the vpn, after connecting it changes the dns entries in the other ethernet card which is for local network.i have configured the IP address automatically to the local network ethernet and in that situation i am not able to ping the other ethernet card dns ip's.and when i am configuring local network card IP manually then after connecting to the vpn its changing the dns entries from to other dns entries which are configured on the other ethernet card. please help me if anyone knows how to resolve that issue.

the seconds ethernet cable is coming from a router which is configured by some other company and installed in our office, and cable is plugged in this router and then going to a 8 port switch and then two systems are connected to that network because we only have two specific Class A IP addresses allowed to use, and local network cable is going from my internal office switch which have class c ip address configured on it,

The C2ENET-2 is a dual port Ethernet card with the same features and functionality as the C2ENET-1, plus the C2ENET-2 enables the control system's built-in firewall, router and network address translator (NAT). This allows for creation of a dedicated internal network for Crestron and other related IP enabled devices through the LAN B port of the C2ENET-2. The LAN A port provides a secure single-point connection for the entire internal network to the client's LAN/WAN and Internet using a single external IP address.

When using SFP+ direct attach copper cable the SFP+ modules comes with (are firmly attached to) the cable, but when using optical fiber the SFP+ module(s) needs to be purchased separately.The Ethernet card of the external computer may or may not need an SFP+ module so either one or two SFP+ modules will be needed in total. SP Devices recommends using the Avago AFBR-709SMZ SFP+ module with ADQ10GBE. 041b061a72


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