MikroTik CRS112-8P-4S-IN (8-Port Gigabit PoE Switch): The Consensus

Product Overview

The MikroTik CRS112-8P-4S-IN is an 8-port Gigabit Ethernet Smart Switch with PoE-out and RouterOS L5, featuring four SFP ports for optical fiber connectivity up to 1 Gbps. Owners frequently highlight its robust hardware quality and the extensive capabilities offered by RouterOS, making it an appealing option for network engineers deeply familiar with the MikroTik ecosystem. Several reviewers praised the device as a "great little power house" and appreciated its fanless design for silent operation. However, the overall consensus reveals significant caveats, particularly regarding its out-of-the-box PoE functionality and its performance when attempting to utilize advanced switching features, leading to a mixed reception among verified owners.

Performance and Stability Concerns

Stability and overall performance emerge as notable weaknesses for this device. Multiple owners reported severe degradation in throughput when attempting to implement advanced features such as VLANs. One reviewer explicitly stated that the internal chipset "gets thrashed" when VLANs are added, throttling speeds to less than 100Mbps. Another detailed a "massive performance impact," observing throughput drops to approximately 360 Megabits per second when even a single port was allocated to a VLAN. This suggests that the internal switch chip or CPU, described as "weedy" by one long-term owner, struggles significantly with processing tagged traffic, effectively limiting the device to functioning as a "dumb" switch if stable, high-speed performance is desired for managed features. Concerns were also raised about the SFP ports, which some found "quirky" and requiring manual configuration to fix them at 1GbE rather than relying on auto-negotiation, adding to the setup complexity and potential for instability. One owner had to remove the switch entirely due to its poor performance, stating it "does not even come close to the speeds they advertise."

Connectivity and PoE Limitations

Despite being advertised as a PoE switch, a consistent and significant complaint among buyers revolves around the necessity of purchasing a separate, higher-voltage power supply to adequately power modern PoE devices. Owners report that the included power supply is often insufficient for equipment like wireless access points. This effectively increases the product's price point considerably, with several reviewers noting the additional cost of a 48VDC PSU can add $60 to $80 to the total investment. While the switch technically supports both 24VDC and 48VDC PoE, the reliance on an extra purchase for full 48VDC functionality significantly detracts from its value proposition and ease of deployment. The four SFP ports provide optical fiber connectivity options, supporting uplinks of up to 1 Gbps, but buyers specifically looking for 10 Gbps connectivity should be aware that this model does not support such speeds.

Ease of Use and Value for Money

Ease of use is a substantial hurdle, particularly for those new to MikroTik's RouterOS. Multiple reviewers explicitly stated that this is not a "plug and play" device and demands a steep learning curve, requiring users to possess considerable knowledge of MikroTik configurations. Its software is described as "not nearly as easy to set up as competing options," although those competitors often come at much higher price points. This complexity makes the CRS112-8P-4S-IN less suitable for casual users or those seeking a simple, out-of-the-box network solution. For experienced MikroTik users, the hardware quality combined with RouterOS's deep programmability is seen as offering strong value, enabling the device to be programmed to do "most anything RouterOS can handle." However, the hidden cost of the mandatory 48VDC power supply for full PoE functionality significantly diminishes its overall value for money, making it less compelling against alternatives once the true price is considered. Reliability and endurance received mixed feedback, with some owners reporting satisfactory long-term operation, while others experienced failures within months or had to replace the unit due to poor performance, with one reporting a unit failed after six months with no technical support response.