I am trying to enable simple mutlicast within a VLAN on an Arista 7060CX2 running EOS 4.20.10M. I have tried every combination of configurations and nothing works.
I have a host connected to E1/1 running rhel 7.5 add another with the same OS connected to E1/2. I have tried using both nuttcp and iperf to send the multicast data.
My first configuration was:
But that would not work. The show ip igmp snooping groups command had no output and traffic would not pass from one host to the other.
I then tried enabling ip routing and multicast routing with no effect. I also enabled PIM on the interface. All of which should not be necessary, and none of which worked.
The ONLY way i have been able to send multicast from one host to another was to disable igmp snooping on the switch. Then, iperf would send traffic to the 126.96.36.199 address and the receiver would get it.
HOWEVER, even in this state(igmp snooping turned off), nuttcp still would not work. nuttcp requires the multicast address be 231.x.x.x. These are “reserved” addresses.
I did set up a port mirror(monitor session) and verified the multicast traffic is making it to the switch. It just doesn’t forward the 231.x.x.x addresses AT ALL and only forwards the 188.8.131.52 when snooping is disabled.
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