Creating Bridges in router mode - Router change mode

RouterOS General
1

Hi all.
Working on RB1100, 750 and so on. Firmware 7.Y.X.

Suppose we have this scenario.

  1. Router Mode (from Quick Set)
  2. Two bridges (LAN1-Bridge and WAN1-Bridge)
    WAN1-Bridge: Eth1 and Eth2 ports
    LAN1-Bridge: Eth3 and Eth4 ports
    Loop off and RSTP on for both the bridges. IP addresses on two bridges, of course.

LAN1-Bridge
PC connected with winbox

WAN1-Bridge (dhcp client)
I connect one cable on eth2 only; eth1 becomes inactive/disabled (i see it from Bridge\ports)
This is still true if move the cable from Eth2 to Eth1. Even if i an other host (say a VoIP Device) to Eth2.
I always have Eth1 as inactive/disabled.

Bridge always up and working

Well, if enable Eth1 manually, these facts occur:

  1. Router turns to bridge mode
  2. LAN1-Bridge address becomes WAN address (LAN bridge have not IP address anymore)
  3. WAN1-bridge is associated to LAN interface list.
  4. WAN list contains Eht1 port and not WAN1-bridge.

No ports of LAN-Bridge show same behaviour.

Where are my mistakes in this scenario? I argue it could be related to bridges.

Thanks in advance,

2

When you change anything outside the QuickSet window (and bridge manipulation is definitely something done outside QuickSet), you must never ever go back into QuickSet … it will mess up the config in various random ways.

Also beware of “detect internet” function … it can misbehave and screw you. If you know what you’re doing it’s best to disable the function and manage interface lists (WAN and LAN) manually.