Mikrotik mlag Each machine has 2x Mellanox ConnectX-4 Dual port NICs. Multi-Chassis Link Aggregation (MLAG) has emerged as a powerful solution, enabling the creation of We've purchased 4 pieces of Mikrotik CRS317 with the intent to build our new server solution around it's hardware accelerated switching and MLAG (specifically to be used for diskless DRBD network). In both core pairs CORE1 has lower priority, thus becomes primary switch in MLAG. #mlag #mikrotikmlag #mikrotik We'll dive deep into the world of network redundancy with MikroTik switches! Join us as we explore Link Aggregation Control Protocol (LACP) and Multi-Chassis Link Thoughts on MLAG? Relatively noob MT user here trying to level up his home network, and I thought I'd look into MLAG. x or later) series you normally: Create a bond for the MLAG-PEER. The same port/bond is used for both types. Each NIC, is supposed to be connected to a different switch, with a MLAG setup where each port on each NIC is on its own MLAG with one of the switches. Theoretiaclly Mikrotik Nov 10, 2023 · Hello guys! I have a particular scenario that I’m working on which I got stuck while reading the documentation: The applications are running inside a VMWare cluster of 4 machines. The idea is to have 2 mikrotiks in each rack, configured with MLAG and for rack servers to connect to both using LACP bond to ensure high availability. All of the connections between switches are Jan 29, 2025 · When creating a MLAG on CRS3xx/CRS5xx (using RouterOS v7. First, my design: Two localities, let’s call them LOC_A and LOC_B. How to setup MLAG on mikrotik switches Sep 22, 2024 · In today’s fast-paced digital world, network reliability is paramount. The idea is to connect 4 servers in a cluster on those two switches in an MLAG configuration for redundancy. MLAG (Multi-chassis Link Aggregation Group) implementation in RouterOS allows configuring LACP bonds on two separate devices, while the client device believes to be connected on the same machine. As networks grow in complexity and the demand for uninterrupted services intensifies, network administrators are constantly seeking robust solutions to eliminate single points of failure and enhance network resilience. All bonds use 1s lacp-rate. Define “mlag-id” for the LAGs to be the same on both devices (like when creating a LAG-UPLINK the LAG-UPLINK on both Apr 22, 2025 · Hi, I’ve had two CRS518-16XS-2XQs for a while now. I unplug the ports from Router 2, disable the mlag ids, and remove the bridge from being assigned as an MLAG. Define a pvid (for example 4094) on the MLAG-PEER interface to be used for ICCP traffic. Configure “bridge mlag” to use the above as peer-port. The same applies to LOC_B. Vlans need to be configured on peer port, so that switch chip can filter/forward traffic for devices connected to MLAG partner in the same vlan. There is an article which says that it is not possible to use hardware offloading with the MLAG feature. The Jul 23, 2025 · Hello, I have a question about what exactly happens when member interface joins MLAG. This provides a physical redundancy in case of switch failure. Apr 23, 2025 · Hi, What are the best practices for setting up a MLAG? From what I understand: Creating a bonding with 2 LACP interfaces First question: do I need to create an MLAG on this bonding ? When I say create a MLAG, I mean add an MLAG ID, as long as it’s my peerbond Add the bonding to the bridge In the bridge, under MLAG , select the bonding created just before Is it necessary and possible to MikroTik MLAG with VLANs for Data Centers Run MLAG feature on your Data Center using MikroTik switches 4. In each Oct 6, 2023 · I am trying to set up MLAG for my two CRS switches that are connected via SFP+24 and then all other ports be in the same VLAN and able to ping eachother. In each locality a pair of core switches CORE1_LOC_A and CORE2_LOC_A (connected using peerlink). Now we will show MLAG peer port is used to transport regular traffic (packets that need to reach devices connected to MLAG partner) and also it is used to transport MLAG internal protocol (ICCP) data. All CRS3xx, CRS5xx series and CCR2116, CCR2216 devices can be configured with MLAG. At the end I am getting 300 Mbps and 100% CPU load on the primary mikrotik out of the 100 GB port. 8 (14 ratings) 86 students Hello everyone! I have 2 CRS504 and the plan was to implement LACP+MLAG for the physical redundancy of the server. Now I go through the same exercise with changing the VRRP priority and everything just works. A good month ago, we talked about LACP in a comprehensive video and made several references to MLAG (Multi-chassis Link Aggregation Group). Each baremetal server has a SFP+ cable attached to each CRS (on … May 26, 2023 · This is an example from an MLAG pair of switches with both QSFP+ and SFP+ ports For the most part, the config would be identical on both switches in the stack except for devices that have only one link into the stack # The bond config could/should be mostly identical # MLAG-ID's are the way the two switches determine which connections belong to which devices # I use 1sec LACP rate and L3-4 for Jun 5, 2025 · Hello. Jul 21, 2025 · MLAG (Multi-chassis Link Aggregation Group) implementation in RouterOS allows configuring LACP bonds on two separate devices, while the client device believes to be connected to the same machine. Where I have two aggregations between nodes1 and nodes2, or aggregations where nodes . Behind those two switches I have a Mikrotik CCR2004-1G-12S+2XS router that is connected to those two switches with one bonded Jun 15, 2023 · We continue our MikroTik Shorts series. Each server has 4x25G network cards that are bonded (LACP), two ports on one switch and two on the other. (I tried with iperf) When I try to use hardware offloading with a single port Mar 14, 2025 · I read mt guide and any other guides that I could find about MLAG with same end results, as soon as I enable and get connection between switches one of them get kickout - traffic is getting blocked? From test-to-test sometime entire network is down (both switches). What is the preferred scenario for connecting MikroTiks connected by MLAG to two other switches that also support MLAG? As LACP using MLAG consisting of 4 ports so that each device is connected to each other, or maybe some other combination? I can see two other ones, but they seem less correct to me. AFAIK the CRS line doesn't support stacking, so MLAG looked like the next best thing for high availability LACP. 15. lte kwsp ocrw auxzf zrtwrde ueihdih dzdm zgwo jfbr zpvh dqtc bvqp lndyr svvw bgbz