Routing between VLANs on CRS3xxx

RouterOS General
1

How could routing between VLANs be done on CRS3xx devices using the cpu ?
I know these are non performant routers but they are fast enough for some tasks.

I tried to create a vlan interface within the bridge:
/interface vlan
add interface=bridge1 name=vlan4 vlan-id=4

But there is no Incoming traffic on this interface. Should see at least some Broadcasts.
The vlan is configured and moves traffic through the switch.

/interface bridge vlan
add bridge=bridge1 tagged=
sfp-sfpplus1,sfp-sfpplus2,sfp-sfpplus3,sfp-sfpplus4 vlan-ids=4


What I am missing?

2

I think you need to add bridge1 as tagged

3

Correct. When you want to access a vlan from the router itself and

vlan-filtering=yes

on a bridge, it is not sufficient to create the

/interface vlan

with the bridge as underlying interface, but you must also tell the bridge that it should let that vlan’s packets to reach the CPU port, which for some mystic reason is not done automatically but by adding the bridge as a tagged port of itself for that

vlan-ids

row.

4

Thanks! That does the trick.

@MT you might want to add this to the documentation: https://wiki.mikrotik.com/wiki/Manual:CRS3xx_series_switches