Network Broadcast Notes - Kramer KDS-USB2 User Manual

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2.2 Network Broadcast Notes

Further information about Network Broadcast Notes can be found at the
2.2.1 Subnet Broadcast
To broadcast a packet to a subnet you only have to use the broadcast IP of the subnet. For example to
broadcast to a network configured as an IP range of 192.168.5.xxx, and a netmask of 255.255.255.0,
IP 192.168.5.255 is the broadcast IP address. For example to broadcast to a network
the
configured as an IP range of 10.xxx.xxx.xxx, and a netmask of 255.0.0.0, the IP
10.255.255.255 is the broadcast IP address.
Routers will drop broadcast IP packets, destined for an address outside of the source address
device's network; which means that any broadcast packet must originate on the same
network as the target devices.
2.2.2 All Local Subnet Broadcast
By broadcasting to the IP address 255.255.255.255 a broadcast packet can be sent out,
without previously knowing what the local network is. Microsoft Windows will however only
send the packet out the first configured network interface, so on a computer with multiple
interfaces, each interface should sent a broadcast network packet separately.
2.2.3 Mismatched Network Configuration
When broadcasting to a subnet using the network broadcast address (for example
192.168.5.255), and the device is configured for a different network (for example
IP=10.0.9.23, netmask=255.0.0.0), then the device will not respond to the broadcast as it will
not recognize the IP address as a valid broadcast.
This shouldn't happen with a proper DHCP server allocated addresses out of the same pool
for the network. It could potentially happen when assigning static IP addresses, and moving
units between networks. If this does happen the unit will need to be reset to DHCP by the
push button, as described in the user's guide, and then the static IP address can be assigned
to the unit.
SwitchableUSB – 2
General Information
references section.
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