vlan and cisco switch (again)

RouterOS General
1

hi i have read lots of topics about vlans and switches now, still cant get it to work.

here my setup in brief: ROS ether2 is connected to fastethernet0/13 on catalyst 3500XL, the vlan interface has an ip address, have a test laptop in fastethernet0/21 an a ip address from the same ip-network than the vlan interface. i cant ping or access the ROS router. the ROS router has no firewall settings enabled. the ether2 interface has no ip address, only the vlan on the ether2 interface. i am aiming for a setup with multiple vlan interfaces on ether2 which i can then terminate on a remote catalyst switch and have one port per vlan at the remote catalyst. currently i am doing that by using real physical ethernet ports on a router rather than vlans.

here the settings in detail:

ROS:
Flags: X - disabled, R - running

NAME MTU ARP VLAN-ID INTERFACE

0 R ;;; DF
vlan301 1500 enabled 301 ether2

Catalyst:
interface FastEthernet0/13
description ether2
duplex full
speed 100
switchport trunk encapsulation dot1q
switchport mode trunk

interface FastEthernet0/21
description DF
duplex full
speed 100
switchport access vlan 301

any help would be VERY welcome.

regards
Jan

2

have no 3500XL near… shouldn’t you have something like ‘switchport trunk vlan 301’ on FastEthernet0/13?

3

hi chupaka,

the line ‘switchport trunk vlan 301’ is not a valid command. but i have tried this as well now:

interface FastEthernet0/13
description ether2
duplex full
speed 100
switchport trunk allowed vlan 1,301,1002-1005
switchport mode trunk

and this

interface FastEthernet0/13
description ether2
duplex full
speed 100
switchport mode trunk

both dont work.

4

it seems like ‘switchport trunk allowed vlan’ needs also advervisement by IGMP from MT… see manual how to add port to vlan with tag

5

hmmm…i was reading the section about vlan in the manual, i cant see anything which i need to do to make it a tagged vlan. i was reading here:

http://www.mikrotik.com/testdocs/ros/2.9/interface/vlan.php

if i have missed a point or read the wrong document please post a link to the right documentation. i am using ROS 2.9.46 intel/amd.

regards
Jan

6

no-no, not Mikrotik but Cisco manual

in ZTE (Cisco analogue) we have following configuration:

vlan 55
!
interface fei_1/1
  negotiation auto
  switchport mode hybrid
  switchport hybrid native vlan 55
  switchport hybrid vlan 55 untag
!
interface gei_7/1
  negotiation auto
  hybrid-attribute copper
  switchport mode hybrid
  switchport hybrid native vlan 1
  switchport hybrid vlan 55 tag
  switchport hybrid vlan 1049-1096 tag
  switchport hybrid vlan 1 untag
!

we use hybrid not trunk because our MT communication is in untagged vlan

7

now, strange things here now.

this now works, i had it before but now it works fine. only difference, i have rebooted the router in the meanwhile.

interface FastEthernet0/13
description ether2
switchport trunk encapsulation dot1q
switchport mode trunk

interface FastEthernet0/19
switchport access vlan 303

interface FastEthernet0/21
description DF
duplex full
speed 100
switchport access vlan 301

the catalyst i have does not know the mode “hybrid”, only the following:

Test-Switch(config-if)#switchport mode ?
access Set trunking mode to ACCESS unconditionally
multi Set trunking mode to multi-VLAN mode
trunk Set trunking mode to TRUNK unconditionally

i probablt dont have the right software on the switch or its simply because its an old model. but anyway, it works. besides the strange effects on ethernet interfaces i have mentioned in an other topic, this is again a situation which makes me wonder what is going on.

thanks for your help anyway.

regards
Jan

8

Your Cisco config is correct and fine, nothing wrong there…

If rebooting the MT solved it, then so be it I guess… There may have been a clitch on that side somewhere. FYI what we use:

!
interface GigabitEthernet0/1
 description Router Uplinks
 switchport mode trunk
 switchport nonegotiate
 spanning-tree link-type point-to-point
end

....

!
interface FastEthernet0/15
 description Wireless Access Points
 switchport access vlan 10
 switchport mode access
 storm-control broadcast level 90.00 65.00
 storm-control multicast level 90.00 65.00
 storm-control action shutdown
 spanning-tree portfast
end

...

vlan 10
 name PriorityData