750UP bridge works local, not across network

RouterOS General
1

I have bridged all 5 ports to basically use this unit as a 5-port PoE switch that I can l login to and manage. This works when I plug my laptop in directly to the ports, but not when I stick it on the network a few hops away. I can ping/ssh into adjacent IP units on the same subnet coming off the same 750, but not the 750 itself. Here’s the relevant config:

/interface ethernet
set 0 arp=enabled auto-negotiation=yes disabled=no full-duplex=yes l2mtu=1600 \
    mac-address=D4:CA:6D:03:71:EF mtu=1500 name=ether1-gateway speed=100Mbps
set 1 arp=enabled auto-negotiation=yes bandwidth=unlimited/unlimited \
    disabled=no full-duplex=yes l2mtu=1598 mac-address=D4:CA:6D:03:71:F0 \
    master-port=none mtu=1500 name=ether2-master-local poe-out=auto-on \
    poe-priority=10 speed=100Mbps
set 2 arp=enabled auto-negotiation=yes bandwidth=unlimited/unlimited \
    disabled=no full-duplex=yes l2mtu=1598 mac-address=D4:CA:6D:03:71:F1 \
    master-port=none mtu=1500 name=ether3-slave-local poe-out=auto-on \
    poe-priority=10 speed=100Mbps
set 3 arp=enabled auto-negotiation=yes bandwidth=unlimited/unlimited \
    disabled=no full-duplex=yes l2mtu=1598 mac-address=D4:CA:6D:03:71:F2 \
    master-port=none mtu=1500 name=ether4-slave-local poe-out=auto-on \
    poe-priority=10 speed=100Mbps
set 4 arp=enabled auto-negotiation=yes bandwidth=unlimited/unlimited \
    disabled=no full-duplex=yes l2mtu=1598 mac-address=D4:CA:6D:03:71:F3 \
    master-port=none mtu=1500 name=ether5-slave-local poe-out=auto-on \
    poe-priority=10 speed=100Mbps
/interface bridge port
add bridge=5_bridge disabled=no edge=auto external-fdb=auto horizon=none \
    interface=ether3-slave-local path-cost=10 point-to-point=auto priority=\
    0x80
add bridge=5_bridge disabled=no edge=auto external-fdb=auto horizon=none \
    interface=ether5-slave-local path-cost=10 point-to-point=auto priority=\
    0x80
add bridge=5_bridge disabled=no edge=auto external-fdb=auto horizon=none \
    interface=ether4-slave-local path-cost=10 point-to-point=auto priority=\
    0x80
add bridge=5_bridge disabled=no edge=auto external-fdb=auto horizon=none \
    interface=ether2-master-local path-cost=10 point-to-point=auto priority=\
    0x80
add bridge=5_bridge disabled=no edge=auto external-fdb=auto horizon=none \
    interface=ether1-gateway path-cost=10 point-to-point=auto priority=0x80
/interface bridge settings
set use-ip-firewall=no use-ip-firewall-for-pppoe=no use-ip-firewall-for-vlan=\
    no
/ip accounting web-access
set accessible-via-web=no address=0.0.0.0/0
/ip address
add address=192.168.5.74/24 comment="mt750 itself" disabled=no interface=\
    5_bridge network=192.168.5.0
2

It needs a default route to be reply to hosts which are not on its own subnet.

Note that using the switch chip where possible would use less CPU than bridging all ports.

3

yep, that worked, thanks :slight_smile:

For anyone else who’s trying this, here’s what I did:

/ip route add dst-address=0.0.0.0/0 gateway=192.168.5.1

I think I messed with switching vs. bridging awhile back, and for some reason I was able to get bridging working, but not switching. Are there any special tricks, or should I just slave all interfaces to ether1 and give ether1 an ip of 192.168.5.74/24 with a default route upstream?