Subnet Mask; Dhcp; Chapter 3 General Ip Configuration - NEC Univerge SV9100 Manual

2.2
2.3
3-2
A Public address is normally only used when a device is directly connected to the
Internet. This is unlikely in the case of the equipment. If Public addressing is
used, the numbers are normally allocated by an ISP.

Subnet Mask

As the IP address includes information to identify both the network and the final
destination, the Subnet Mask sets apart the network and destination information.
The default subnet masks are:
Class A 255.0.0.0

Class B 255.255.0.0

Class C 255.255.255.0

The Subnet Mask is made up of four groups of numbers. When a group contains
the number 255, the router ignores or masks that group of numbers in the IP
address as it is defining the network location of the final destination.
For example, if the IP address is: 172.16.0.10 and the Subnet Mask used is Class
B (255.255.0.0), the first two groups of numbers (172.16) are ignored once they
reach the proper network location. The next two groups (0.10) are the final
destination within the LAN to which the connection is to be made.
 For sub-netted networks, the subnet mask may be different from the default subnet
masks listed above.

DHCP

Dynamic Host Configuration Protocol (DHCP) assigns a dynamic IP address.
Network control may be easier with DHCP as there is no need to assign and
program individual IP addresses for the LAN equipment. To use a dynamic IP
address, a DHCP server must be provided. The UNIVERGE SV9100 system
GCD-CP10 blade provides an internal DCHP server, enabling the ability to use
DHCP.
When equipment, which is connected to the LAN (the DHCP client), is requesting
an IP address, it searches the DHCP server.
When the request for an address is recognized, the DHCP server assigns an IP
address, Subnet mask, and the IP address of the router, based on UNIVERGE
SV9100 system programming.
Note that the GCD-CP10 blade must always have a static IP address. This
address is set in Program 10-12-01 : GCD-CP10 Network Setup – IP Address
(default: 192.168.0.10).
Issue 2.0
General IP Configuration