Hello,

I just noticed strange low speed over VLAN interface...
If I copy files (windows SMB) from PC2 (VLAN100) to PC1 (VLAN1) speed is around 26MB/s (CPU 100%)
If I copy the same files via Ether4 (VLAN1, or simply no VLAN) the speed is 90MB/s (CPU 93%)

This was tested with RB2011-2Hnd ( ROS 5.22) and Procurve V1910G-48 switch..
The setup was as follows:
ether4= 192.168.3.1/24
bridge-vlan100=192.168.2.1/24
Bridge= ether2, ether4
DHCP on both interfaces
PC1 connected to ether2

Test1 with VLAN100 (spped 26MB/s):
Ether4 connected to Procurve port 48 (Hybrid, VLAN1 and VLAN100 Tagged)
PC2 connected to Procurve port 1 (VLAN1 untagged, PVID1, port in AccessMode - default)
PC1 connected to RB2011 ether2

Test2 no VLAN (90MB/s):
Ether4 connected to Procurve port 48 (Hybrid, VLAN1 and VLAN100 Tagged)
PC2 connected to Procurve port 1 (VLAN100 untagged, PVID100)
PC1 connected to RB2011 ether2

All connections and cables are left the same in both tests. In Firewall I have added the first rule:
/ip firewall filter add chain=forward action=accept src-address=192.168.0.0/16 dst-address=192.168.0.0/16
This rule should catch all traffic before my other firewall rules..

I also tried to put VLAN100 directly to Ether4 interface and in Bridge disabled ehter4 for VLAN test (Test1) but the speed stayed the same...

Is this drop in speed normal? I doubt it...
I have attached a picture (empty Firewall and no defined Queues, bridge has disabled IP FW) which shows CPU usage (look at FW and QUEUES) in VLAN test..
Can someone else try and confirm this... If it is a bug then maybe Mikrotik can fix it..

can you post diagrams of your network setup.