vlans/trunk between juniper switch and mikrotik

RouterOS General
1

Hello,

I have a tried a fair few things so far following posts and the wiki but I could not get my juniper switch (EX-2200C) to talk properly with my mikrotik 450G.

My mikrotik has ether1 as the internet connection (public IP to a bridged modem), and I am using ether3 as the trunk to the juniper switch and ether5 as my lan IP (192.168.0.0/24)

I have set the juniper as a trunk interface connected to ether3 on the mikrotik. I have tried to set a common vlan between the 2 and there is a layer 3 IP on the juniper interface (which is also on 192.168.0.0/24).

I do not seem to be able to make them communicate. Could anyone advise on a sample configuration to get this to work please?

Cheers.

2

Show your Mikrotiks configuration.
/export compact hide-sensitive

3

I have currently disabled trunking and used normal access instead, i had 2 spare nics so this seems to have done the job for now.

Thanks for your response.

4

What I found after several hours of trial and error is that vlan trunking between a mikrotik with a switch chip and an external switch doesnt work. period. As soon as I moved the test config to an old rb600 I had laying around, it worked perfectly.

I ran torch on the ethernet interface on the 493 I was using and what I found was that the incoming packets had the vlan tag from the switch, but the reply packets were tagged for vlan 1. No matter what vlan the incoming packets were from the outbound was always vlan 1. on the rb600, the tags were correct both ways.

Sounds to me like the switch chip is confusing things internally. Nasty bug for sure.

5

That’s an interesting one. Surely some other people here would have hit that one before?

6

Yes… I have the “same” problem… I can’t route between different VLAN’s, where the other side is a RB450G… Can’t figure out too! :frowning:

7

Hi guys!

I have a RB450G and guess what, after few days I managed to make it work with vLans and my Switch Linksys srw224g4, but in the past weeks I am not able to make them comunicate (inter vlan comunnication).

This switch chip inside or 450G is causing a mess!

Did you guys find any solution for that ?

cheers

8

I reverted to a flat network at home since I had other issues with multicast but not only (that was not the mikrotik’s fault, but another managed switch I have at home). Would love to hear from someone else though.

9

What kind of problem with multicasting you were having ?

10

Multicast was just not making it outside the vlan, turned out to be an issue with igmp snooping turned on. As I said not a mikrotik issue.

11

OK…

I am having a problem and I think the problem is not in the Mikrotik too… my rb450g connects to may Linksys srw224g4 with 3 vlans. Win7 and Linux get the IP from 450g dhco without a problem, but my Mac and my wireless router wrt54g they don´t get the IP.

I think its something related to my switch, but I cant find where…

cheers mate.