Hi, I'm looking at paring a CCR2004-1G-12S+2XS with a CRS326-24S+2Q+RM.

I'd like to use a LAG to join the two, preferably using the 2 x SFP28 ports on the router and the QSFP ports on the Switch.

I'm imagining it should be possible to get 20Gbps on each leg of my LAG, given that the QSFP is 4 x 10Gbps and the SFP28 is capable of 25Gbps. But I fully expect someone to tell me this won't work at all!

If this should work in theory can someone please point me at the correct optics or a DAC cable? They will be right next to each other in the rack.

Many thanks.

According to https://wiki.mikrotik.com/wiki/MikroTik ... F25G_SFP28 the Q+BC0003-S+ is compatible with the SFP28 ports on the CCR2004, so using two of the four lanes on the QSFP+ would give an aggregate of 20Gbps.

Unless you are using all of the 24SFP+ ports on the CRS326 you could just use a pair of S+DA0001/S+DA0003 or XS+DA0001/XS+DA0003 (operating at 10Gbps) between the two Mikrotiks,