How to do "ifconfig lo multicast" using IPROUTE2 / ip command I am trying to figure out how to add the "MULITCAST" parameter to the lo interface using the "ip" command. I already have a netplan config which adds the multicast route to my lo interface: 224.0.0.0/4 dev lo proto static scope link But the lo interface needs to be able to participate in multicast messaging. example: Current configuration: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 Desired configuration (note the presence of MULTICAST): 1: lo: <LOOPBACK,MULTICAST,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 In the ifconfig days, I would issue: `ifconfig lo mulitcast` How do I accomplish this with the ip command? (ifconfig is not installed by default on Ubuntu 22.04)

Run `ip link help` and you get the answers :


ip l set lo multicast on


from `ip-link(8)`:

> ip link set { DEVICE | group GROUP }
>
>
> [ { up | down } ]
> [ type ETYPE TYPE_ARGS ]
> [ arp { on | off } ]
> [ dynamic { on | off } ]
> [ multicast { on | off } ]
>