An indication of which other Virtual LANs UDP/IP
broadcasts received on this port will be forwarded
to. The normal situation is broadcasts NOT
forwarded beyond the originating VLAN, but it can
be useful in certain circumstances. This is an
octet string value with bits set to indicate
forwarded to VLANs. It can be interpreted as a sum
of f(x) as x goes from 0 to 1023, where f(x) = 0
for no forwarding to VLAN x and f(x) = exp(2, x)
for VLAN x forwarded to. If all bits are 0 or the
octet string is zero length, then UDP/IP
broadcasts are not being forwarded to other
VLANs.