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Hacking RTL960x based xPON ONU Stick to suite your Universal OLT
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DFP-34X-2C2 - strange multicast on ethernet #51

Open dominiaz opened 2 years ago

dominiaz commented 2 years ago

I have 2Mbit/s traffic all the time on Jazztel ISP in Spain.

I have configured vlan1074 on sfp-sfpplus1 on RB4011. I am getting Internet over DHCP Client.

On sfp-sfplplus1 i see strange multicast traffic (using MT torch).

src: 10.179.0.10 dst: 239.192.250.254 (2 Mbit direct on sfp-sfpplus1)

What is it? How to block that traffic?

skon77 commented 2 years ago

RB4011 (Terminal):

/ip firewall raw add action=drop chain=prerouting src-address=10.179.0.10

I hope this is not SFP address of course.

Better yet, check out Mikrotik's manual at the link. Your particular case falls under the general concept of this article.

crrodriguez commented 2 years ago

I saw the same behaviour.. not sure what is going on.

longthanhtran commented 12 months ago

I think you can try with diag gpon show ds-flow to identify the downstream flow with multicast traffic. For example, 

RTK.0> gpon show ds-flow
============================================================
     GPON ONU MAC D/S Flow Status
Flow ID | GEM Port | Type | Multicast | AES
      0 |      704 |  ETH |           |
      1 |      705 |  ETH |           |
      2 |      706 |  ETH |           |
      3 |      707 |  ETH |           |
      4 |     4095 |  ETH |           |
      5 |     4094 |  ETH |         * |
     64 |       37 | OMCI |           |
============================================================

Then remove the downstream flow via its id diag gpon del ds-flow flow-id 5 (per above result) and verify again.

In my case, the traffic of iptv gone completely so I think it will be back once the sfp reboot / reconnect.