Trouble with multicast over WiFi on RB4011iGS

sauregurkenzeit · Fri Apr 26, 2024 11:44 pm

Hello MikroTik Community,

I'm facing a problem with multicasting over Wi-Fi. When I connect the laptop with a wire, everything works fine.

Setup:

Devices: Raspberry Pi (connected on Ethernet port 4), KNX/IP Gateway (connected on Ethernet port 7), and a laptop connected via WiFi.

Configuration: All interfaces, excluding WAN, are part of a single bridge.

I send multicast packets to the group 224.0.23.12 from my laptop 192.168.1.64, the KNX/IP Gateway 192.168.1.150 receives these packets and sends replies.
I can successfully capture these packets on the Raspberry Pi:

    192.168.1.64.3671 > 224.0.23.12.3671: [udp sum ok] UDP, length 17
22:45:32.758520 IP (tos 0x0, ttl 2, id 10059, offset 0, flags [none], proto UDP (17), length 45)
    192.168.1.64.3671 > 224.0.23.12.3671: [udp sum ok] UDP, length 17
22:45:32.776011 IP (tos 0x0, ttl 16, id 42179, offset 0, flags [none], proto UDP (17), length 45)
    192.168.1.150.3671 > 224.0.23.12.3671: [udp sum ok] UDP, length 17
22:45:32.821121 IP (tos 0x0, ttl 16, id 42180, offset 0, flags [none], proto UDP (17), length 45)
    192.168.1.150.3671 > 224.0.23.12.3671: [udp sum ok] UDP, length 17

Despite the above, the replies from the KNX/IP Gateway are not visible on my laptop.

392	10.631938	192.168.1.64	224.0.0.22	IGMPv3	54	Membership Report / Join group 224.0.23.12 for any sources
393	10.633156	192.168.1.64	224.0.23.12	KNXnet/IP	59	RoutingInd L_Data.ind 15.15.240->0/1/1 GroupValueRead
415	10.654284	192.168.1.64	224.0.0.22	IGMPv3	54	Membership Report / Join group 224.0.23.12 for any sources
416	10.669670	192.168.1.64	224.0.23.12	KNXnet/IP	59	RoutingInd L_Data.ind 15.15.240->0/1/2 GroupValueRead
595	13.481116	192.168.1.64	224.0.0.22	IGMPv3	54	Membership Report / Leave group 224.0.23.12
599	13.651148	192.168.1.64	224.0.0.22	IGMPv3	54	Membership Report / Leave group 224.0.23.12

When I start polling the KNX bus from my laptop, WiFi interface appears in the MDB :

/interface/bridge/mdb> print 
Flags: D - DYNAMIC
Columns: GROUP, ON-PORTS, BRIDGE
 #   GROUP              ON-PORTS  BRIDGE
 0 D 224.0.1.60         ether6    local 
 1 D 224.0.23.12        ether4    local 
                        ether7          
                        wifi1

Here is my current bridge config:

/interface/bridge> export hide-sensitive
# 2024-04-26 22:51:25 by RouterOS 7.14.3
# software id = WQ1X-38ZL
#
# model = RB4011iGS+5HacQ2HnD
# serial number = D43B0DD7EA76
/interface bridge
add fast-forward=no igmp-snooping=yes igmp-version=3 last-member-interval=10s mld-version=2 multicast-querier=yes name=local port-cost-mode=short
/interface bridge port
add bridge=local interface=ether2 internal-path-cost=10 path-cost=10
add bridge=local interface=ether3 internal-path-cost=10 path-cost=10
add bridge=local interface=ether4 internal-path-cost=10 path-cost=10
add bridge=local interface=ether5 internal-path-cost=10 path-cost=10
add bridge=local interface=ether6 internal-path-cost=10 path-cost=10
add bridge=local interface=ether7 internal-path-cost=10 path-cost=10
add bridge=local interface=ether8 internal-path-cost=10 path-cost=10
add bridge=local interface=ether9 internal-path-cost=10 path-cost=10
add bridge=local interface=ether10 internal-path-cost=10 path-cost=10
add bridge=local interface=wifi1 internal-path-cost=10 path-cost=10

and wireless:

/interface/wifi> export hide-sensitive
# 2024-04-26 23:12:19 by RouterOS 7.14.3
# software id = WQ1X-38ZL
#
# model = RB4011iGS+5HacQ2HnD
# serial number = D43B0DD7EA76
/interface wifi
set [ find default-name=wifi1 ] configuration.country=Ecuador .mode=ap .multicast-enhance=enabled .ssid=RT-5WiFi-61E9 disabled=no mtu=1500 security.authentication-types=wpa2-psk,wpa3-ps

any advice or suggestions?
thanks in advance

Trouble with multicast over WiFi on RB4011iGS

Trouble with multicast over WiFi on RB4011iGS

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