I want to receive multicast traffic on the 239.0.0.0 network. The multicast traffic is sent on the same subnet as my CentOS 7 server. How do I enable my network interface to subscribe to the multicast traffic on the local network? How do I verify that the interface is subscribed and can receive multicast traffic?
How do I enable an interface to listen to multicast?
centos
Should be by default at the interface level, unless you've done something to disable MULTICAST.# ip a | fgrep MULTICAST2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000ip link set ens3 multicast on could turn it on manually, if it's been somehow disabled, though that would likely better be done via the network-scripts.Otherwise, you'll probably need to delve around in ip-maddress(8) if there's a specific link-layer multicast address you need to listen for on an interface; ip maddress show should list the default ones.