Running virtual link on default interface yields the following errors: "vlink: failed to join the multicast group xxx.xxx.xxx.xxx on interface 0.0.0.0, errno 19". "fasp_vlink_start_local: errno=81, errstr=[virtual link failed to start up]"

In order for an application to successfully join a multi-cast group on the default ethernet interface, a default route needs to be set up for that multi-cast address. For example:

route add default $DEFAULT_GATEWAY
or
route add -net 224.0.0.0 netmask 224.0.0.0 $DEV