R3204P16-HP Load Balancing Module Network Management Configuration Guide-6PW101

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NOTE:
If the NAT configuration (address translation or internal server configuration) on an interface is changed,
HP recommends that you save the configuration and reboot the LB module, to avoid problems. The
following are the possible problems: After you delete the NAT-related confi
g
uration, address translation
can still work for sessions already created; if you configure NAT when NAT is running, the same
configuration may have different results because of different configuration orders.
Configuring NAT address pool
In dynamic address translation, the NAT gateway selects an address from a referenced NAT address
pool as the source address of a packet.
Follow the following steps to configure a NAT address pool:
To do… Use the command…
Remarks
Enter system view system-view —
Configure an address
pool
nat address-group
group-number start-address
end-address
Required
Not necessary when the router provides only Easy
IP, where the interface’s public IP address is used
as the translated IP address.
Configuring address translation
Introduction to address translation
A NAT gateway can be configured with or dynamically generate mappings to translate between internal
and external network addresses. Generally, address translation can be classified into two categories,
static and dynamic NAT.
• Static NAT
Mappings between external and internal network addresses are manually configured. Static NAT can
meet fixed access requirements of a few users.
• Dynamic NAT
A dynamic NAT entry is generated dynamically. Dynamic NAT is implemented by associating an ACL
with an address pool (or the address of an interface in the case of Easy IP). This association defines what
packets can use the addresses in the address pool (or the interface’s address) to access the external
network. Dynamic NAT is applicable when a large number of internal users need to access external
networks. An IP address is selected from the associated address pool to translate an outgoing packet.
After the session terminates, the selected IP address is released.
Configuring static NAT
You need to configure static NAT in system view, and make it effective in interface view.
Static NAT supports two modes, one-to-one and net-to-net.
1. Configuring one-to-one static NAT
One-to-one static NAT translates a private IP address into a public IP address.
Follow these steps to configure one-to-one static NAT: