Multicast problems in RB2011

RouterOS General
1

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Hello,

I have a strange thing in my RB2011.

Setup: Cable modem - RB2011-fibre-HP Procurve switch - end devices (printer, three AP’s, two laptops and some phones)
No VLAN’s or something strange. Three VPN’s, work fine.

Yesterday, “out of nothing” I saw a huge amount of multicast traffic coming FROM 239.2.0.252 towards an internal IP (that IP belongs to a NVR (network video recorder)) from Ubiquiti and two camera’s. That traffic kills completely the internet. Even when the NVR is physically switched OFF the traffic does not stop. Only after I switch off physically the cable, modem, then it stops.

Some can think: probable cause is the NVR + camera’s.
Today the same happened with a friend, which came with his Samsung A5, and automatically connected to the WiFi. And immediately 6-8 Mbps of multicast went towards the phone. Even when he left, and I removed the IP from the DHCP lease, the traffic did NOT stop. Again, only after reset of the cable modem it stopped.


What is here the problem? How can I prevent to happen again?

2

I suspect it is the Ubiquity Discovery Tool

Maybe log a call with Ubiquity to get more info

3

I already talked to Ubiquiti. That is a “normal” behaviour. The camera’s continue to send information, even when the NVR is switched off. Fine. I get that.

What about the mobile phone? So is sending multicast to the phone, and even when he left the network it continues…

4

Is the screenshot of multicast to your buddies phone? If so, address 233.89.188.1 is used by Ubiquity Discovery Tool on port 10001

If you want you can block Multicast traffic on the RB2011, but that might break your Ubiquity setup

5

Sorry, the screenshot was indeed the traffic to the Ubiquity.

I downgraded it now to 3.8.3, and it “seems” to be stable.

I wonder why the mobile phone generated or received such an amount of traffic. On that phone there is no Ubiquity app installed.

6

I “solved” the problem. For some reason, the Ubiquiti NVR (network video recorder) was not responding to the camera’s, so the camera’s started to shout multcast…

I had to reset the NVR to factory settings, load the previous (stable) firmware, and then re adopted the camera’s again.

Already almost a week, and no problems…

But really weird…