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Thank you. Since posting the question I have more specific requirements which I will post in a new question.
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Thank you. Since posting the question I have more specific requirements which I will post in a new question.

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I am searching for a layer 3 device/router capable of QoS that runs on 24vdc as the input voltage. <br />
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The reason for this is that we manufacture racks of specialist equipment that runs on 24vdc and also has battery-backup that supplies 24vdc. We need to add a router with QoS to the rack and it would be very convenient for it to be backed up by the same battery.
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I am searching for a layer 3 device/router capable of QoS that runs on 24vdc as the input voltage. 

The reason for this is that we manufacture racks of specialist equipment that runs on 24vdc and also has battery-backup that supplies 24vdc. We need to add a router with QoS to the rack and it would be very convenient for it to be backed up by the same battery.

Help me find a router with QoS and 24vdc input voltage

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

Networking hardware includes the physical devices facilitating the use of a computer network. Typically, networking hardware includes gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters. But it also includes hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address translators, multiplexers, network interface controllers, wireless network interface controllers, ISDN terminal adapters and other related hardware.

Networking Hardware-Other

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.