RB5009 using RouterOS 7.14RC1 :
When adding a VLAN interface on a bridge, it is not possible to have MTU = L2MTU.
For example, if the available L2MTU is 1600 on the VLAN interface, then it is not possible to get a MTU of 1600. If i try to put MTU = 1600, then the interface revert to MTU = 1500 silently without any error message (using Winbox).
If i put MTU = 1599, then it is ok. Seems like we need to reduce the MTU 1 byte below the L2MTU size, if not the value is rejected and defaulted to 1500.
Seems like a bug that was not present a few versions ago. We should be able to put the same MTU as the L2MTU.
Same problem on the bridge interface.
When adding a VLAN interface on a bridge, it is not possible to have MTU = L2MTU.
For example, if the available L2MTU is 1600 on the VLAN interface, then it is not possible to get a MTU of 1600. If i try to put MTU = 1600, then the interface revert to MTU = 1500 silently without any error message (using Winbox).
If i put MTU = 1599, then it is ok. Seems like we need to reduce the MTU 1 byte below the L2MTU size, if not the value is rejected and defaulted to 1500.
Seems like a bug that was not present a few versions ago. We should be able to put the same MTU as the L2MTU.
Same problem on the bridge interface.
Statistics: Posted by FIPTech — Sat Feb 17, 2024 11:39 am