James Knott wrote:
On 10/03/2014 12:05 PM, Per Jessen wrote:
Yes I know they should respond. My question is why only the one
device responds to the mulitcast, local broadcast or broadcast addresses. In IPv4, 224.0.0.1 is an address all devices should respond to. Why are they not?
Because their interfaces are not set up with that multicast address.
All devices are supposed to listen to that address. It's the all hosts multicast IPv4 address. It's not something you configure. Likewise they should respond to the broadcast (255.255.255.255) and local broadcast (network address plus all ones in the host portion)
If I ping the network broadcast address, I don't see anything icmp replies being reported, but I do see them coming in with tcpdump. I presume the firewall is getting in the way. If I ping 255.255.255.255, tcpdump shows nothing. I did play with setting up multicast a few years back, but ISTR it was way more complicated than I needed it to be, and sending multiple packets ended up being sufficiently fast. -- Per Jessen, Zürich (15.8°C) http://www.hostsuisse.com/ - dedicated server rental in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org