Problem with slow internet download speeds on CRS317-1G-16S switch OS 6.41.3
I am new to networking having become an accidental administrator so hopefully i can explain the problem clearly.

I am trying to set up a backup ADSL / wan line to the CRS317 switch. This then connects to a bridge modem, before connecting to the ISP line.
The line and modem appears to be fine and If i connect a RB750 on its own i get 12mbs on a speed test. All Good.
Once i put the setup onto the CRS317 I can only get 1mbs download speed.

My PPPoE setting are all the same as my other lines which are on a CCR1016-12S-1S

I thought it may be related to the Ethernet RJ45 SFP Module (Mikrotil S-RJ01) in the SFP socket but the problem persists if i use The ethernet socket "Ether 1" on the switch.

If i connect the RB750 to the CRS 317 and route the traffic to it my speed still drops to 1mbs.

Bandwidth tests between Routers and switches are all ok.

The CRS317 CPU is only at 2-3% so overloading is not an issue.

As far as i can narrow it down, the drop in speed is originating in the CRS317

The only thing i can see is a large number of Rx-FCS errors on sfpplus2. This has the pppoe-client attached to it and the Ethernet RJ45 SFP Module is plugged, into going to the modem .
These errors don’t appear if i use the RB750 so i don’t know where they appear from or you to stop them.

Any suggestions as to how to proceed or narrow the problem down would be a great help.



# may/02/2018 18:17:03 by RouterOS 6.41.3
# software id = 3PD3-0LDT
#
# model = CRS317-1G-16S+
# serial number = xxxxxxxxxxxx
/interface bridge
add fast-forward=no name=bridge1 vlan-filtering=yes
/interface ethernet
set [ find default-name=sfp-sfpplus1 ] name="sfp1-Trunk & LAN"
set [ find default-name=sfp-sfpplus2 ] advertise=10M-full,100M-full,1000M-half,1000M-full l2mtu=1580 name=sfp2-WAN-Router4 speed=100Mbps
set [ find default-name=sfp-sfpplus3 ] name="sfp3-EB Server"
set [ find default-name=sfp-sfpplus4 ] name="sfp4-DHS Management" speed=10Mbps
set [ find default-name=sfp-sfpplus5 ] name="sfp5-SITE 100"
set [ find default-name=sfp-sfpplus6 ] name="sfp6-SITE 99-93"
set [ find default-name=sfp-sfpplus7 ] name="sfp7-SITE 47-48-49-50"
/interface pppoe-client
add allow=pap,chap disabled=no interface=sfp2-WAN-Router4 keepalive-timeout=60 max-mru=1480 max-mtu=1480 name=pppoe-out4 password=xxxxx use-peer-dns=yes user=xxxxx
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
/ip hotspot profile
set [ find default=yes ] html-directory=flash/hotspot
/interface bridge port
add bridge=bridge1 interface="sfp1-Trunk & LAN"
add bridge=bridge1 interface=ether1
add bridge=bridge1 interface="sfp3-EB Server"
add bridge=bridge1 interface="sfp5-SITE 100" pvid=100
add bridge=bridge1 interface="sfp4-DHS Management" pvid=10
add bridge=bridge1 interface="sfp6-SITE 99-93"
add bridge=bridge1 interface="sfp7-SITE 47-48-49-50" pvid=47
/interface bridge vlan
add bridge=bridge1 tagged="sfp1-Trunk & LAN" untagged="sfp5-SITE 100" vlan-ids=100
add bridge=bridge1 tagged="sfp1-Trunk & LAN,sfp6-SITE 99-93" untagged=sfp-sfpplus9 vlan-ids=99
add bridge=bridge1 tagged="sfp1-Trunk & LAN,sfp6-SITE 99-93" vlan-ids=93
add bridge=bridge1 tagged="sfp1-Trunk & LAN,sfp6-SITE 99-93" untagged="sfp4-DHS Management" vlan-ids=10
add bridge=bridge1 tagged="sfp1-Trunk & LAN" untagged="sfp7-SITE 47-48-49-50" vlan-ids=47
add bridge=bridge1 tagged="sfp1-Trunk & LAN,sfp7-SITE 47-48-49-50" vlan-ids=48
add bridge=bridge1 tagged="sfp1-Trunk & LAN,sfp7-SITE 47-48-49-50" vlan-ids=49
add bridge=bridge1 tagged="sfp1-Trunk & LAN,sfp7-SITE 47-48-49-50" vlan-ids=50
/ip address
add address=10.146.1.12/24 interface=bridge1 network=10.146.1.0
/ip firewall address-list
add address=0.0.0.0/8 comment="Self-Identification [RFC 3330]" list=Bogons
add address=10.0.0.0/8 comment="Private[RFC 1918] - CLASS A # Check if you need this subnet before enable it" list=Bogons
add address=127.0.0.0/8 comment="Loopback [RFC 3330]" list=Bogons
add address=169.254.0.0/16 comment="Link Local [RFC 3330]" list=Bogons
add address=172.16.0.0/12 comment="Private[RFC 1918] - CLASS B # Check if you need this subnet before enable it" list=Bogons
add address=192.0.2.0/24 comment="Reserved - IANA - TestNet1" list=Bogons
add address=192.88.99.0/24 comment="6to4 Relay Anycast [RFC 3068]" list=Bogons
add address=198.18.0.0/15 comment="NIDB Testing" list=Bogons
add address=198.51.100.0/24 comment="Reserved - IANA - TestNet2" list=Bogons
add address=203.0.113.0/24 comment="Reserved - IANA - TestNet3" list=Bogons
add address=224.0.0.0/4 comment="MC, Class D, IANA # Check if you need this subnet before enable it" list=Bogons
/ip firewall filter
add action=accept chain=forward comment="defconf: accept established,related,untracked" connection-state=established,related,untracked
add action=drop chain=forward comment="defconf: drop invalid" connection-state=invalid
add action=drop chain=forward comment="defconf: drop all from WAN not DSTNATed" connection-nat-state=!dstnat connection-state=new in-interface=pppoe-out4
add action=drop chain=forward comment="Drop to bogon list" dst-address-list=Bogons in-interface=pppoe-out4
add action=drop chain=input comment="Drop External ICMP ping" in-interface=pppoe-out4 protocol=icmp
add action=accept chain=input comment="Allow ICMP ping" protocol=icmp
add action=accept chain=forward comment="defconf: accept established,related, untracked" connection-state=established,related,untracked
add action=drop chain=input in-interface=pppoe-out4
/ip firewall nat
add action=masquerade chain=srcnat out-interface=pppoe-out4
/ip route
add check-gateway=ping distance=1 gateway=pppoe-out4
add distance=1 dst-address=10.0.0.0/8 gateway=10.146.1.254
/system clock
set time-zone-name=Europe/Dublin
/system identity
set name="EB Switch 2"
/system ntp client
set enabled=yes primary-ntp=216.239.35.0 secondary-ntp=216.239.35.4
/system routerboard settings
set boot-os=router-os

If all else fails read the manual !

I solved the problem.
The Mikrotik S-RJ01 Ethernet RJ45 SFP Module is only compatible with the CRS317 switch at 1000mbs and 10mbs not 100mbs.