Amer Networks E5Web GUI - Manual (Page 132)

Note: IP and MAC Addresses
Address book objects can never contain both IP addresses and Ethernet MAC addresses
since these are entirely different in their usage. MAC address book objects are primarily
used with the cOS Core Proxy ARP feature.
3.1.5. Auto-Generated Address Objects
To simplify the configuration, a number of address objects in the address book are automatically
created by cOS Core when the system starts for the first time and these objects are used in
various parts of the initial configuration.
The following address objects are auto-generated:
• Interface Addresses
For each Ethernet interface in the system, two IP Address objects are predefined; one object
for the IPv4 address of the actual interface, and one object representing the local network for
that interface.
Interface IPv4 address objects are named _ip and network objects are
named _net. As an example, an interface named If1 will have an associated
interface IP object named If1_ip, and a network object named If1_net.
These addresses are stored in an address book folder called InterfaceAddresses. However, in
virtualized configurations, these addresses will be top level address book entries.
On some older Clavister hardware models, the underscore is left out from the auto-generated
interface network name. For example, the lan interface will have the network object lan_net.
When changing the IP address of an Ethernet interface, it is strongly recommended to
change the address of the default address book object and not change the IP address directly
on the Ethernet interface.
• The Default Gateway Address
On most platforms, an IPv4 Address object with the suffix "_gw" is also auto-generated for the
default interface used for connection to the public Internet. For example, if the Internet
connection is assumed to be on interface wan then the default gateway address gets the
name wan_gw. This IP address represents the external router which acts as the gateway to
the Internet.
This address is used primarily by the routing table, but is also used by the DHCP client
subsystem to store gateway address information acquired through DHCP. The object will
have an empty IP address (0.0.0.0/0), and the correct IP address for the default gateway needs
to be defined unless DHCP is being used and assigns it automatically.
•
The all-nets Address Object
The all-nets IP address object is initialized to the IPv4 address 0.0.0.0/0, which represents all
possible IPv4 addresses. The all-nets IP object is used extensively when configuring of cOS
Core and it is important to understand its significance.
3.1.6. Address Book Folders
In order to help organize large numbers of entries in the address book, it is possible to create
Chapter 3: Fundamentals
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