Switch unreachable after adding second one on management vlan

RouterOS Beginner Basics
1

Hello everyone,

I have been troubleshooting for hours now and I’m kinda out of ideas.
So my main switch is a CRS328-24P-4S+RM. With a management vlan interface configured on is bridge. Today I added a new RB260GSP on the same management vlan.
I created a trunk port with tagged management vlan and connected my RB260GSP switch. And all of a sudden both switches were unreachable. I disconnected the RB260GSP but my main switch is still unreachable.

Currently I only have access via the console. Does anybody have some suggestions on how to troubleshoot this problem further?

Thank you in advance!

2

I created an export of the current configuration. This is the config, the MGMT_NET is tagged on the uplink Ports aswell:

/interface vlan
add interface=bridge name=MGMT_NET vlan-id=900



/interface bridge vlan
add bridge=bridge comment=LAN tagged=sfp-sfpplus4,ether10 untagged=MGMT_NET vlan-ids=900



/ip address
add address=192.168.99.2/24 interface=MGMT_NET network=192.168.99.0

3

The config export is not complete. But anyway: never add VLAN interface back to bridge as port. Instead you should be setting bridge pirt as tagged member of MGMT VLAN.

/interface bridge vlan
add bridge=bridge comment=LAN tagged=> bridge,> sfp-sfpplus4,ether10 > untagged=MGMT_NET > vlan-ids=900

And make sure you have vlan-filtering=yes set on bridge.

I suggest you to read these two tutorials, they will help you to better understand the way bridge and VLANs work in ROS:
http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1
http://forum.mikrotik.com/t/routeros-bridge-mysteries-explained/147832/1

4

Thank you so much! This solved my problem!
Also thank you for the guides.