951G-2HnD is dropping all wired interfaces on hi network load

urbinek · Mon Jan 22, 2018 9:40 am

Hello there!

I've got a little but wierd issue. If i try to send large file (e.g. 10GB) over wire transfer is very nice - full 1Gbps whoever after couple seconds all MT interfaces are dropping and transfer stops.

With smaller files (~1GB) problem is not occurring (whoever transfer is lower, aroung 400Mbps)

RB is not rebooting, but in logs i've found this:
mikrotik log:

15:52:08 interface,info ether1-wan link down 
15:52:08 interface,info ether2-ipmi link down 
15:52:08 interface,info ether3-tv link down 
15:52:08 interface,info ether4-xen2 link down 
15:52:08 interface,info ether5-desktop link down 
15:52:10 interface,info ether5-desktop link up (speed 1G, full duplex) 
15:52:10 interface,info ether5-desktop detect LAN 
15:52:11 interface,info ether2-ipmi link up (speed 1G, full duplex) 
15:52:11 interface,info ether3-tv link up (speed 10M, half duplex) 
15:52:11 interface,info ether2-ipmi detect LAN 
15:52:11 interface,info ether3-tv detect LAN 
15:52:12 interface,info ether1-wan link up (speed 1G, full duplex) 
15:52:12 interface,info ether4-xen2 link up (speed 1G, full duplex) 
15:52:12 interface,info ether1-wan detect LAN 
15:52:12 interface,info ether4-xen2 detect LAN 
15:52:13 interface,info ether1-wan detect UNKNOWN 
15:52:19 interface,info ether1-wan detect INTERNET

clientlog:

[22219.688877] bash (6266): drop_caches: 3
[22241.907208] alx 0000:03:00.0 enp3s0: Link Down
[22243.765378] alx 0000:03:00.0 enp3s0: NIC Up: 1 Gbps Full
[22263.788680] alx 0000:03:00.0 enp3s0: Link Down
[22265.708076] alx 0000:03:00.0 enp3s0: NIC Up: 1 Gbps Full
[22290.907736] alx 0000:03:00.0 enp3s0: Link Down
[22292.797491] alx 0000:03:00.0 enp3s0: NIC Up: 1 Gbps Full
[22314.908021] alx 0000:03:00.0 enp3s0: Link Down
[22316.741696] alx 0000:03:00.0 enp3s0: NIC Up: 1 Gbps Full

server log:

[19752.946836] igb 0000:03:00.0 eno1: igb: eno1 NIC Link is Down
[19752.946936] xen_br: port 1(eno1) entered disabled state
[19755.632313] igb 0000:03:00.0 eno1: igb: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[19755.735005] xen_br: port 1(eno1) entered blocking state
[19755.735029] xen_br: port 1(eno1) entered forwarding state
[19774.948081] igb 0000:03:00.0 eno1: igb: eno1 NIC Link is Down
[19774.948272] xen_br: port 1(eno1) entered disabled state
[19777.617514] igb 0000:03:00.0 eno1: igb: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[19777.727254] xen_br: port 1(eno1) entered blocking state
[19777.727281] xen_br: port 1(eno1) entered forwarding state
[19801.948389] igb 0000:03:00.0 eno1: igb: eno1 NIC Link is Down
[19801.948507] xen_br: port 1(eno1) entered disabled state
[19804.636868] igb 0000:03:00.0 eno1: igb: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[19804.637341] xen_br: port 1(eno1) entered blocking state
[19804.637365] xen_br: port 1(eno1) entered forwarding state
[19826.347664] igb 0000:03:00.0 eno1: igb: eno1 NIC Link is Down
[19826.348223] xen_br: port 1(eno1) entered disabled state
[19828.963149] igb 0000:03:00.0 eno1: igb: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[19828.963730] xen_br: port 1(eno1) entered blocking state
[19828.963749] xen_br: port 1(eno1) entered forwarding state

urbinek · Tue Jan 23, 2018 1:58 pm

I've found a solution, but it is more like workaround which ihmo isn't ideal.

All i need to do was dissable fastpath by enabling firewall on bridge, and set RAW rules for CPU conservation

/interface bridge settings
set use-ip-firewall=yes use-ip-firewall-for-vlan=yes

/ip firewall raw
add action=accept chain=prerouting dst-address=192.168.88.250 src-address=192.168.88.100
add action=accept chain=prerouting dst-address=192.168.88.100 src-address=192.168.88.250

951G-2HnD is dropping all wired interfaces on hi network load

951G-2HnD is dropping all wired interfaces on hi network load

Re: 951G-2HnD is dropping all wired interfaces on hi network load

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