My ISP provides a modem/router and some tv set top boxes. In my case I have bypassed their modem for internet, but would still like to get the set top boxes functioning. My ISP utilizes 2 vlans for the following services, 34 for TV and 35 for Internet. I currently have internet functioning through a vlan 35 WAN interface behind my local nat, but haven’t been able to get the ISP router and set top boxes working.
What I’m attempting to do is connect my ISPs modem/router to my router via vlan 34, which should passthrough to the wan interface. I tried to create a second bridge (bridge-wan). and add both the wan and eth port the ISP router is on. Though when I do this, for some reason when the ISP modem requests an ip with DHCP, the offer never makes it to the ISP modem. I do see that it’s received by the WAN interface, but that’s where it stops.
Probably you need a specific COS type setting for the connecting handshake....
In Ros I believe this is called vlan priority.
vlan-priority (integer:0..7; Default: 0) If the DHCP client is running on a VLAN interface (/interface/vlan), you can specify the Priority Code Point (PCP) value. PCP is a 3-bit field in the VLAN header used to mark the priority of packets within a VLAN, allowing traffic to be prioritized accordingly. This setting applies only to VLAN interfaces and affects the priority of outgoing DHCP client packets.
If zero, the default is not working, try 1,2,3,4 I doubt it would be anything above 4.
There is another paramter there DSCP, which has to do with QoS, and may also be a factor.
however I think this is for internal router use??
I think we might also need the crude diagram of how your ISP expect you to connect it up ...
If you are connecting ISP router WAN to Mikrotik LAN and have already taken off VLAN 34 have you really given something looking like the ONT interface to the ISP router? Assuming the set top boxes have ethernet interfaces, it might be better to try to emulate the whole of the ISP router with the Mikrotik
I agree with DuctView about trying to do everything on the MT router and leaving the ISP router out of the picture. Use one or the other. The ISP may be expecting the MAC addresses to be the same on vlan 35 and vlan 34. But that's just a guess.
When you were using your ISP router, did you have visibility to the vlans?
What MT router do you have (model and ROS version)?
What is the ISP router (make/model/firmware)?
Perhaps capture traffic on the internet port and see what is really happening.
Ideally you would have another switch with mirror port capability so you could capture traffic on the link from the ONT, e.g. a device (like a CSS106-5G-1S), Then you could compare what you see on the link when using the ISP router in its original role connected directly to the ONT, and then compare that with when you have your MT router connected in its place. This could let you see if COS/PCP/vlan-priority is not the default on your ISP router.
Also, I assume the set top boxes are using untagged standard ethernet (but connected to a different network)? I.e. did the ISP provided router have a separate connection for the IPTV "network"?
Thanks for all the feedback. I did discover why the DHCP offers weren’t making it past the WAN interface. I had a vlan 34 interface on the WAN interface which shouldn’t have been there. The ISP modem is now getting an IP and is working. If anyone is interested, I may show an updated diagram and list the hardware I’m currently running when I have time.
This is what I ended up with, hopefully this updated diagram makes it a bit more clear. Also, one change from before is I’m using a single bridge this time.
