Avaya Configuring IP Services Bedienungsanleitung Seite 107

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Customizing IP Services
117356-A Rev. A 4-31
Specifying a Broadcast Address for an Interface
In broadcasting, the IP router transmits a single packet to every host on an
attached network. To do so, it uses a broadcast address that refers to all hosts on
the network. A broadcast address is simply an IP address that contains all 1s or all
0s in the host portion.
For example, the IP Class C address 10.3.45.12 has the following characteristics:
Because the address is for a Class A network (the network portion is 1 byte),
the host portion contains 3 bytes.
Because the host portion of a broadcast address consists of all 1s or all 0s, the
broadcast address for that network can be one of the following:
10.255.255.255, 10.0.0.0, 255.255.255.255, or 0.0.0.0.
Some networks do not support broadcasts; thus, configuring an IP broadcast
address does not guarantee efficient broadcast delivery.
By default, IP uses a broadcast address that contains all 1s in the host portion.
Accept the default unless the calculated broadcast address (host portion) of all 1s
is not adequate. If this is the case, then use the BCC or Site Manager to enter the
appropriate IP broadcast address in dotted-decimal notation.
Using the BCC
Navigate to an IP interface-specific prompt and enter
broadcast
broadcast_address
broadcast_address is an IP addressed expressed in dotted-decimal notation.
For example, the following command assigns broadcast address 1.1.1.1 to IP
interface 2.2.2.2.
ip/2.2.2.2# broadcast 1.1.1.1
ip/2.2.2.2#
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