Do I have a BAD Routerboard?

I’m wondering if anyone has anything else to check. Ive tried everything here with no avail. Thinking I have a defective unit??

Problem - Ping times suddenly ~1200ms both ways. Laptop straight in to bb modem is fine.

Config is fairly basic. Only some port forwards, no firewall. Dhcp client on 1, server on bridge. I’ve tried disabling interfaces 1-10 and pings dont improve, so not caused by lan side. Latency is so bad i can only get to it on ssh.

I will try anything you ask. Board will probably be replaced in the morning if its not solved.

[admin@MikroTik] /ip firewall nat> /export compact
# jan/02/1970 00:31:33 by RouterOS 6.5
# software id = 91HJ-L0JV
#
/interface bridge
add admin-mac=4C:5E:0C:27:90:61 auto-mac=no l2mtu=1598 name=bridge-local \
    protocol-mode=rstp
/interface ethernet
set [ find default-name=ether1 ] name=ether1-gateway
set [ find default-name=ether6 ] name=ether6-master-local
set [ find default-name=ether7 ] master-port=ether6-master-local name=\
    ether7-slave-local
set [ find default-name=ether8 ] master-port=ether6-master-local name=\
    ether8-slave-local
set [ find default-name=ether9 ] master-port=ether6-master-local name=\
    ether9-slave-local
set [ find default-name=ether10 ] master-port=ether6-master-local name=\
    ether10-slave-local
/ip neighbor discovery
set ether1-gateway discover=no
/ip hotspot user profile
set [ find default=yes ] idle-timeout=none keepalive-timeout=2m \
    mac-cookie-timeout=3d
/ip pool
add name=default-dhcp ranges=192.168.1.120-192.168.1.253
/ip dhcp-server
add address-pool=default-dhcp disabled=no interface=bridge-local name=default
/port
set 0 name=serial0
/interface bridge port
add bridge=bridge-local interface=ether2
add bridge=bridge-local interface=ether3
add bridge=bridge-local interface=ether4
add bridge=bridge-local interface=ether5
add bridge=bridge-local interface=ether6-master-local
add bridge=bridge-local interface=sfp1
/ip address
add address=192.168.1.1/24 comment="default configuration" interface=\
    bridge-local network=192.168.1.0
/ip dhcp-client
add comment="default configuration" dhcp-options=hostname,clientid disabled=\
    no interface=ether1-gateway
/ip dhcp-server network
add address=192.168.1.0/24 comment="default configuration" dns-server=\
    192.168.1.1 gateway=192.168.1.1
/ip dns
set allow-remote-requests=yes servers=8.8.8.8,4.2.2.2
/ip dns static
add address=192.168.1.1 name=router
/ip firewall filter
add chain=input comment="default configuration" protocol=icmp
add chain=input comment="default configuration" connection-state=established
add chain=input comment="default configuration" connection-state=related
add chain=forward comment="default configuration" connection-state=\
    established
add chain=forward comment="default configuration" connection-state=related
add action=drop chain=forward comment="default configuration" \
    connection-state=invalid
add action=drop chain=input disabled=yes
/ip firewall nat
add action=masquerade chain=srcnat comment="default configuration" \
    out-interface=ether1-gateway
add action=dst-nat chain=dstnat dst-port=6000 in-interface=ether1-gateway \
    protocol=tcp src-port="" to-addresses=192.168.1.51 to-ports=22
add action=dst-nat chain=dstnat dst-port=7000 in-interface=ether1-gateway \
    protocol=tcp to-addresses=192.168.1.51 to-ports=443
add action=dst-nat chain=dstnat dst-port=80 in-interface=ether1-gateway \
    protocol=tcp to-addresses=192.168.1.24 to-ports=80
add action=dst-nat chain=dstnat dst-port=81 in-interface=ether1-gateway \
    protocol=tcp to-addresses=192.168.1.26 to-ports=81
add action=dst-nat chain=dstnat dst-port=6001 in-interface=ether1-gateway \
    protocol=tcp to-addresses=192.168.1.64 to-ports=22
add action=dst-nat chain=dstnat dst-port=7001 in-interface=ether1-gateway \
    protocol=tcp to-addresses=192.168.1.64 to-ports=443
add action=dst-nat chain=dstnat dst-port=35000-35001 in-interface=\
    ether1-gateway protocol=tcp to-addresses=192.168.1.24 to-ports=\
    35000-35001
add action=dst-nat chain=dstnat dst-port=35002-35003 in-interface=\
    ether1-gateway protocol=tcp to-addresses=192.168.1.26 to-ports=\
    35002-35003
add action=dst-nat chain=dstnat disabled=yes dst-port=8000 in-interface=\
    ether1-gateway protocol=tcp to-addresses=192.168.1.112 to-ports=80
/lcd interface
set sfp1 interface=sfp1
set ether1-gateway interface=ether1-gateway
set ether2 interface=ether2
set ether3 interface=ether3
set ether4 interface=ether4
set ether5 interface=ether5
set ether6-master-local interface=ether6-master-local
set ether7-slave-local interface=ether7-slave-local
set ether8-slave-local interface=ether8-slave-local
set ether9-slave-local interface=ether9-slave-local
set ether10-slave-local interface=ether10-slave-local
/tool mac-server
set [ find default=yes ] disabled=yes
add interface=ether2
add interface=ether3
add interface=ether4
add interface=ether5
add interface=ether6-master-local
add interface=ether7-slave-local
add interface=ether8-slave-local
add interface=ether9-slave-local
add interface=sfp1
add interface=bridge-local
/tool mac-server mac-winbox
set [ find default=yes ] disabled=yes
add interface=ether2
add interface=ether3
add interface=ether4
add interface=ether5
add interface=ether6-master-local
add interface=ether7-slave-local
add interface=ether8-slave-local
add interface=ether9-slave-local
add interface=sfp1
add interface=bridge-local

What hardware are we talking about, more specifically?

No, you do have a firewall in play:

/ip firewall filter
add chain=input comment="default configuration" protocol=icmp
add chain=input comment="default configuration" connection-state=established
add chain=input comment="default configuration" connection-state=related
add chain=forward comment="default configuration" connection-state=\
    established
add chain=forward comment="default configuration" connection-state=related
add action=drop chain=forward comment="default configuration" \
    connection-state=invalid
add action=drop chain=input disabled=yes
/ip firewall nat
add action=masquerade chain=srcnat comment="default configuration" \
    out-interface=ether1-gateway
add action=dst-nat chain=dstnat dst-port=6000 in-interface=ether1-gateway \
    protocol=tcp src-port="" to-addresses=192.168.1.51 to-ports=22
add action=dst-nat chain=dstnat dst-port=7000 in-interface=ether1-gateway \
    protocol=tcp to-addresses=192.168.1.51 to-ports=443
add action=dst-nat chain=dstnat dst-port=80 in-interface=ether1-gateway \
    protocol=tcp to-addresses=192.168.1.24 to-ports=80
add action=dst-nat chain=dstnat dst-port=81 in-interface=ether1-gateway \
    protocol=tcp to-addresses=192.168.1.26 to-ports=81
add action=dst-nat chain=dstnat dst-port=6001 in-interface=ether1-gateway \
    protocol=tcp to-addresses=192.168.1.64 to-ports=22
add action=dst-nat chain=dstnat dst-port=7001 in-interface=ether1-gateway \
    protocol=tcp to-addresses=192.168.1.64 to-ports=443
add action=dst-nat chain=dstnat dst-port=35000-35001 in-interface=\
    ether1-gateway protocol=tcp to-addresses=192.168.1.24 to-ports=\
    35000-35001
add action=dst-nat chain=dstnat dst-port=35002-35003 in-interface=\
    ether1-gateway protocol=tcp to-addresses=192.168.1.26 to-ports=\
    35002-35003
add action=dst-nat chain=dstnat disabled=yes dst-port=8000 in-interface=\
    ether1-gateway protocol=tcp to-addresses=192.168.1.112 to-ports=80

I’m too new to MT hardware/software to say if this is a problem or not, but I’d start by monitoring a ping from the MT router itself.

At the moment that it happens, look at the router for any strange behavior, any unusual traffic or high CPU.
You should also protect your router from dns attacks:

/ip firewall filter
add chain=input action=drop protocol=tcp in-interface=ether1-gateway dst-port=53
add chain=input action=drop protocol=udp in-interface=ether1-gateway dst-port=53