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Oversize packet on the trunk port, do not accept set MTU 1600 (Jumbo-frame) SG220-50

Stenli323
Level 1
Level 1

I have a problem with the cisco switch model SG220-50 EU. I use on the switch VLANs, and trunks, but every trunks have problem with oversize packet.

Switch is Connect with MikroTik x86(metal port 49,50), next switch SG220-26, and wireless transport on 10GHz(Port 2,23). In the switch is enabel jumbo-frame.

Jumbo-farme have set MTU  1600, on the MikroTik MTU 1518, L2 MTU 1600 (Port 1,2). Every packet  digger than 1496 is oversize. (switch do not accept set jumbo frame 1600).

Error is on the LAG (LACP), and on the single port. I test diferet switch (TP-LINK), and problem is OK.. I think that is error in cisco FW.  At the cisco forum this is problem solved, but unsolved.

The error is very critical, is very packet loss.

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