Cyclades AlterPath OnBoard, Administrator'S Manual

Page: 376 / 460

Understanding Address Configuration for Connected Devices
340 AlterPath OnBoard Administrator’s Guide
• When the connected devices’ addresses are already configured in multiple
ranges and the addresses cannot be changed, or when for some other
reason, connected devices must have addresses in multiple address
ranges, multiple private subnets must be created. (To simplify routing for
PPTP VPN connections, multiple private subnets may also require
configuration of a virtual network, as described in “Why Define Virtual
(DNAT) Addresses?” on page 357.)
• The
priv0
interface, which is used for all the private Ethernet ports, is
not assigned an IP address unless a private subnet is configured.
The following screen example shows the default
ifconfig
output for
priv0
., which shows no IP address.
The OnBoard administrator must define IP address or addresses for
priv0
by defining private subnet(s). When multiple private subnets
exist, their IP addresses are assigned to aliases of
priv0
, such as
priv0:sub1
and
priv0:sub2
.
Configuring a Private Subnet
An administrator configures a private subnet by doing the following:
• Defining a range of IP addresses which administrators can assign to
devices that are connected to the OnBoard’s private ports
• Designating one of the IP addresses within the specified range to be used
by the OnBoard. The OnBoard-side address must be used by users when
creating a IPSec VPN connection to enable native IP access.
The OnBoard uses the specified information to create a route to the private
subnet.
priv0 Link encap:Ethernet HWaddr 00:60:2E:BB:AA:AA
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Base address:0xe000