2

The following /etc/network/interfaces file brings up the dummy0 interface automatically at startup (or using the ifup command), but without multicast. What is the proper way to enable multicast in this file?

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

auto dummy0
iface dummy0 inet static
   address 10.10.0.1
   netmask 255.255.255.0
   multicast 1

source-directory interfaces.d
2

Try:

auto dummy0
iface dummy0 inet static
   address 10.10.0.1
   netmask 255.255.255.0
   post-up ifconfig dummy0 multicast

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