CRS125-24G-1S-2HnD

raymonvdm · Mon Sep 14, 2015 10:46 pm

I`m using a CRS125-24G to switch my network.But i seem to have some issues with assigment of vlans

- ether1 is the master interface
- ether2-24 are slave interfaces of the master interface

I have a Cisco router which gives me a IPTV vlan (vlan4) so i created a vlan 4 on the switch and connected the router to Ether08 of the switch.

VLAN4 is only assigned to ports ether01/02/04/05/08/13
VLAN110 is assigned to all other ports

Why do i still see vlan110 on port ether08 because this is giving me strange network issues

The following config is used on a Cisco 2940 switch which is also connected to the CRS. This config is working fine to get the IPTV vlan on a client connected to the CRS. However when i connect the Cisco router directly to the CRS i cannot get vlan 4 to pass the port.

interface FastEthernet0/5
 description "VLAN4 vanaf Cisco877VA"
 switchport access vlan 404
 switchport trunk native vlan 404
 switchport trunk allowed vlan 4
 switchport mode trunk
 mdix auto
 spanning-tree portfast trunk
end

Note: VLAN404 is used do get rid of the untagged traffic which i do not want to use. I only want to allow tagged vlan 4 traffic to enter the network

raymonvdm · Mon Sep 14, 2015 11:23 pm

I think i found a bug..

Switch --> VLAN --> In. VLAN Tran

I have one rule to set all the untagged traffic to bogus vlan 400

Ports: Ether8
Service VLAN Lookup for: any
Customer VLAN Lookup for: any
Customer VID: 0
New Customer VID: 400

And the IPTV is not working but a soon as i add the following rule it is working fine

Ports: Ether8
Service VLAN Lookup for: any
Customer VLAN Lookup for: any
Customer VID: 4
New Customer VID: 4

And as soon as i disable this rule the signal stops...

StubArea51 · Tue Sep 15, 2015 12:58 am

This is not a bug....see example 2 (Trunk and Hybrid Ports) which is exactly the type of link you are trying to use. Make sure you are properly setting egress VLAN tagging as well.

http://wiki.mikrotik.com/wiki/Manual:CRS_examples

raymonvdm · Tue Sep 15, 2015 10:32 am

I think i made the setup correctly

[admin@sw04] /interface ethernet> print 
Flags: X - disabled, R - running, S - slave 
 #    NAME                                                     MTU    MAC-ADDRESS       ARP        MASTER-PORT          	    SWITCH                                                                           
 0 R  ether01-Trunk crs1.kmp1                                 1500 xxxxx:AE enabled    none                        	                switch1                                                
 1    ether02-Trunk crs2.kmp1                                   1500 xxxxx:AF enabled    ether01-Trunk crs1.kmp1     	switch1                                                
 2 RS ether03-PP18-FreeNAS                                  1500 xxxxx:B0 enabled    ether01-Trunk crs1.kmp1     	switch1                                                
 3 RS ether04-Cisco2940                                          1500 xxxxx:B1 enabled    ether01-Trunk crs1.kmp1     	switch1                                                
 4 RS ether05-PP04-CAP02-Slaapkamer                 1500 xxxxx:B2 enabled    ether01-Trunk crs1.kmp1  	        switch1                                                
 5 RS ether06-CAP01-Woonkamer                           1500 xxxxx:B3 enabled    ether01-Trunk crs1.kmp1     	switch1                                                
 6  S ether07-PP08-Onbekend                                  1500 xxxxx:B4 enabled    ether01-Trunk crs1.kmp1     	switch1                                                
 7 RS ether08-TVVLAN-877VA-Fa2                         1500 xxxxx:B5 enabled    ether01-Trunk crs1.kmp1     	switch1

ports=ether08-TVVLAN-877VA-Fa2 service-vlan-format=any customer-vlan-format=any customer-vid=0 new-customer-vid=400 pcp-propagation=no sa-learning=yes


[admin@sw04] /interface ethernet switch egress-vlan-tag> print 

 4         4 ether04-Cisco2940                                                                                                                                                                                      
             ether05-PP04-CAP02-Slaapkamer                                                                                                                                                                          
             ether08-TVVLAN-877VA-Fa2                                                                                                                                                                               
             ether13-PP13-Dune Kantoor

But it only works after adding this one

ports=ether08-TVVLAN-877VA-Fa2 service-vlan-format=any customer-vlan-format=any customer-vid=4 new-customer-vid=4 pcp-propagation=no sa-learning=yes

StubArea51 · Tue Sep 15, 2015 4:07 pm

If VLAN 4 is coming in tagged then you would need that config in order to distinguish between tagged and untagged traffic, so that is correct.

We did a presentation on the CRS and VLAN rewrites at the 2015 USA MUM in Miami...you might find it helpful.

http://www.mikrotik.com/download/share/ ... 4_by_3.pdf

raymonvdm · Tue Sep 15, 2015 4:37 pm

The data should be coming in as tagged vlan 4, this is also the rule that is matching.

"If traffic comes in tagged with vlan 4 then tagged the traffic with vlan 4"

For now it is working for me and i will put the issue in the refrigerator. I will now wait for IGMP Snooping on the CRS platform.

StubArea51 · Tue Sep 15, 2015 11:24 pm

Glad it's working for you...I guess i'm still trying to figure out what the "issue" you are having is exactly if it is functioning.

One thing that may help clear things up for you is to realize that Cisco switches deal with VLAN tags the way most enterprise switches do and that is by building a trunk and allowing VLANs across it with a native VLAN defined.

The CRS handles VLANs more like a Metro Ethernet switch where every VLAN is matched and re-tagged according to a policy (even if it is not translating or otherwise altering the integer value of the tag) - it's more complicated, but it also provides more flexibility.

CRS125-24G-1S-2HnD

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