Multicast and TPLink

[m4rv1n]

Hi,
I'm a proxmox newbie. I have 2 servers connected to a TL-SG5428 TP Link Switch, and I cannot enable multicast on that switch...

This is the interfaces of the first, connected on port 24

auto lo
iface lo inet loopback

auto vmbr0
iface vmbr0 inet static
        address 192.168.200.50
        netmask 255.255.254.0
        gateway 192.168.200.251
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0
        post-up ( echo 1 > /sys/devices/virtual/net/$IFACE/bridge/multicast_querier )

and the second

auto lo
iface lo inet loopback

auto vmbr0
iface vmbr0 inet static
        address 192.168.200.51
        netmask 255.255.254.0
        gateway 192.168.200.251
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0

but with omping I never receive response msg from second...

 

[m4rv1n]

This is my switch config