MikroTik CRS518-16XS-2XQ-RM is a 1U rackmount switch with 16x 25G SFP28 and 2x 100G QSFP28 ports, ideal for high-performance backbone and enterprise networks.
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MikroTik CRS518-16XS-2XQ-RM is a high-density 100 Gigabit Ethernet switch designed for enterprise networks, data centers and high-performance network distribution environments. It provides 16 × 25G SFP28 ports and 2 × 100G QSFP28 ports, delivering high-speed fiber connectivity in a 1U rackmount platform.
The CRS518 combines Marvell Prestera switching hardware with RouterOS v7, hardware-offloaded switching and Layer 3 routing capabilities. MikroTik specifies a 1.2 Tbps non-blocking switching capacity at the hardware level, making the platform suitable for high-density 25G access or distribution and 100G uplink deployments.
The core feature of the MikroTik CRS518 is its high-speed fiber port density. The switch provides sixteen 25G SFP28 interfaces and two 100G QSFP28 interfaces.
| Port Type | Quantity | Supported Speeds |
|---|---|---|
| SFP28 | 16 | 25G / 10G / 2.5G / 1G |
| QSFP28 | 2 | 100G / 50G / 40G / 25G / 10G / 1G combinations as supported |
| Management Ethernet | 1 | 10/100 Mbps |
The 25G SFP28 ports are backward compatible with 10G and 1G SFP devices, allowing the CRS518 to integrate into networks containing multiple generations of fiber equipment. The QSFP28 interfaces support 100G connectivity and selected breakout configurations.
The MikroTik CRS518-16XS-2XQ-RM uses a Marvell Prestera 98DX8525 switch chip. MikroTik publishes a non-blocking Layer 2 switching capacity of approximately 1.2 Tbps at Layer 1 and approximately 1.18 Tbps at 1518-byte Layer 2 capacity measurements.
This hardware architecture allows the switch to handle high volumes of traffic between the 25G and 100G interfaces without relying entirely on the relatively low-power management CPU for ordinary switch forwarding.
The CRS518 uses the Marvell 98DX8525 switching platform. The switch chip provides the hardware forwarding foundation for high-speed Layer 2 switching and supported Layer 3 hardware offloading.
MikroTik’s RouterOS documentation lists the 98DX8525 platform with support for substantial hardware-offloaded routing and forwarding tables.
The CRS518 supports Layer 3 hardware offloading through its Marvell switch chip. This allows supported routing operations to be processed by the switching hardware rather than exclusively by the CPU.
Supported RouterOS features include hardware-assisted routing, VLAN processing, ACLs and other network functions depending on the configured feature set and hardware-offload compatibility.
MikroTik documents the CRS518 platform with hardware limits of up to approximately 120K IPv4 routes, 64K IPv4 hosts, 20K IPv6 routes and 48K IPv6 hosts under the documented hardware architecture.
The CRS518 runs RouterOS v7 and is supplied with the operating system preinstalled and licensed. The device has a Level 6 RouterOS license according to MikroTik’s official specification.
RouterOS provides configuration capabilities for advanced enterprise switching and routing requirements, including:
MikroTik specifically highlights VLAN, L3 hardware offloading, ACL, LACP, MLAG, jumbo frames and multicast snooping among the CRS518’s supported capabilities.
For enterprise and data center environments, power redundancy is a key consideration. The MikroTik CRS518-16XS-2XQ-RM includes two AC power inputs and two hot-swappable PSU slots.
The power supplies operate from a 100–240V AC input range. The switch itself is specified at approximately 45W without attachments, while MikroTik lists higher maximum system consumption when all attachments are included.
The CRS518 uses four fans for active cooling. The cooling system and power supplies are designed with serviceability in mind, making the platform suitable for rack-mounted enterprise and data center deployments where maintaining network availability is important.
MikroTik specifies approximately 200,000 hours MTBF at 25°C for the platform.
The sixteen 25G SFP28 interfaces make the CRS518 suitable for high-density aggregation and distribution roles. A network can connect multiple 25G servers, switches, storage systems or access-layer devices to the CRS518 while using its 100G QSFP28 ports for higher-capacity uplinks.
A typical architecture can use 25G connections at the access or server layer and 100G links toward the network core or upstream distribution switches.
The two 100G QSFP28 ports provide high-bandwidth uplink and interconnection options. Depending on supported optics, cables and configuration, these interfaces can be used for 100G connections or supported lower-speed configurations.
The QSFP28 interfaces support several speed modes including 100G and selected 50G, 40G, 25G, 10G and 1G configurations. MikroTik documents specific supported combinations, so the exact transceiver or breakout configuration should be checked before deployment.
The CRS518 is not limited to 25G SFP28 modules. MikroTik specifies that its 25G SFP28 ports support 25G, 10G, 2.5G and 1G operation.
This makes the switch useful for gradual network upgrades where existing 10G or 1G fiber equipment needs to coexist with new 25G infrastructure.
The MikroTik CRS518 can be used in a variety of high-speed network environments:
Internet service providers can use the CRS518 as a high-density aggregation switch where multiple 10G or 25G connections need to converge toward higher-capacity 100G infrastructure.
Its VLAN, LACP, ACL, hardware-offloaded routing and multicast-related capabilities provide the building blocks required for complex aggregation architectures, subject to the exact RouterOS configuration and hardware-offload support for each feature.
The combination of 25G SFP28 and 100G QSFP28 connectivity makes the CRS518 suitable for server and storage environments requiring high-speed Ethernet connectivity.
25G interfaces can connect compatible servers and storage platforms, while 100G ports can provide high-capacity uplinks to the network core or another aggregation layer.
The CRS518 is designed for rack installation and has dimensions of approximately 443 × 265 × 44.5 mm, making it suitable for standard 1U rack deployments.
The package includes rack ears and the required power cords. MikroTik specifies an IP20 enclosure rating, so the switch is intended for a dry indoor rack environment rather than outdoor installation.
The CRS518 includes a dedicated 10/100 Mbps Ethernet management port and an RJ45 serial console port for management and recovery operations.
It also includes one USB Type-A port. The USB interface is separate from the high-speed switching interfaces and can be used according to supported RouterOS functionality.
| Specification | Details |
|---|---|
| Product Name | MikroTik CRS518-16XS-2XQ-RM |
| Product Type | 100G Enterprise/Data Center Switch |
| 25G Ports | 16 × SFP28 |
| 100G Ports | 2 × QSFP28 |
| Management Port | 1 × 10/100 Ethernet |
| Switch Chip | Marvell 98DX8525 |
| CPU | QCA9531 |
| CPU Cores | 1 |
| CPU Frequency | 650 MHz |
| Architecture | MIPSBE |
| RAM | 64 MB DDR2 |
| Storage | 16 MB Flash |
| Operating System | RouterOS v7 |
| RouterOS License | Level 6 |
| Switching Capacity | Up to 1.2 Tbps |
| Power Inputs | 2 × AC |
| AC Input Range | 100–240V AC |
| Power Supplies | 2 × Hot-Swappable |
| Cooling | 4 × Fans |
| USB | 1 × USB Type-A |
| Console | RJ45 Serial |
| Dimensions | 443 × 265 × 44.5 mm |
| IP Rating | IP20 |
| Operating Temperature | -40°C to +70°C |
| Attribute | Fact |
|---|---|
| Product | MikroTik CRS518-16XS-2XQ-RM |
| Category | 100G Enterprise and Data Center Switch |
| 25G Connectivity | 16 × 25G SFP28 |
| 100G Connectivity | 2 × 100G QSFP28 |
| Management Ethernet | 1 × 10/100 Mbps |
| Switch Chip | Marvell 98DX8525 |
| Switching Capacity | Up to 1.2 Tbps |
| Operating System | RouterOS v7 |
| RouterOS License | Level 6 |
| Hardware Offloading | Layer 2 and supported Layer 3 hardware offloading |
| Power | Dual AC / Hot-Swappable PSUs |
| Cooling | 4 Hot-Swappable Fans |
| Rack Format | 1U |
| Primary Applications | Data Center, Enterprise Aggregation, 25G Server Connectivity, 100G Uplinks |
MikroTik CRS518-16XS-2XQ-RM is a high-density enterprise and data center switch with 16× 25G SFP28 ports and 2× 100G QSFP28 ports.
The CRS518 has 16 × 25G SFP28 ports.
It has two 100G QSFP28 ports.
MikroTik specifies up to approximately 1.2 Tbps non-blocking Layer 1 switching capacity for the CRS518 platform.
Yes. The 25G SFP28 ports support 10G operation as well as 25G, 2.5G and 1G according to MikroTik’s specifications.
Yes. The SFP28 ports support 1G operation with compatible modules.
Yes. The Marvell 98DX8525 platform supports Layer 3 hardware offloading for supported RouterOS routing functions.
Yes. RouterOS on the CRS518 supports VLAN functionality including 802.1Q and 802.1ad features.
Yes. LACP is among the supported enterprise switching features documented by MikroTik.
Yes. MikroTik lists MLAG support among the CRS518’s switching capabilities.
Yes. The CRS518 has two AC inputs and two hot-swappable power supply slots.
Yes. Its 25G/100G port density, hardware switching, Layer 3 hardware offloading, redundant hot-swappable power supplies and rackmount design are intended for enterprise and data center networking environments.
The dedicated management Ethernet port is 10/100 Mbps. It is not a Gigabit management port.
The CRS518 runs RouterOS v7 and has a Level 6 RouterOS license.
The CRS518 has 64MB of DDR2 RAM and 16MB of Flash storage.
IPVOICE TECHNOLOGIES supplies MikroTik routers, switches, SFP/SFP28/QSFP28 networking products and enterprise network infrastructure equipment for ISP, data center, enterprise and project deployments.
The MikroTik CRS518-16XS-2XQ-RM can be supplied with applicable GST billing, project quotations and nationwide delivery support.
For pricing, availability and bulk/project requirements, visit the Get a Quote page.
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