
Configuring and Customizing IP
303528-A Rev 00
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Specifying a Subnet Broadcast Address
You configure a broadcast address for a subnet differently from the way you
configure a broadcast address for a network. When you extend the network
portion of the IP address to create a subnet address, you automatically take away
from the host portion of the address. To configure a subnet broadcast, you take the
subnet mask for that subnet and invert it. For example, if the IP address of the
subnet is 10.4.2.3, and the mask is 255.255.0.0, then the subnet broadcast address
is either 10.4.255.255 or 10.4.0.0.
Specifying the Cost of an Interface
Each IP interface has an assigned cost. The interface cost is added to routes
learned on this interface through RIP and is specified in subsequent RIP packets
transmitted out other interfaces.
If the interface is configured for RIP, keep in mind that increasing the cost causes
the upper bound set by the RIP Network Diameter parameter to be attained more
rapidly.
By default, an IP interface has a cost of 1. You can use the BCC or Site Manager
to specify another value as required.
Using the BCC
Navigate to an IP interface-specific prompt and enter:
cost
cost
cost is an integer indicating the cost of interface.
For example, the following command assigns a cost of 2 to IP interface 2.2.2.2:
ip/2.2.2.2# cost 2
ip/2.2.2.2#
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