User Manual

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Users Manual of XGS-6350-24X4C
Figure 43-4 NAT TCP load balance
When translating the cycle address, the routing switch performs the following steps:
(1) The user of host B (9.6.7.3) sends instructions for connecting the virtual host 1.1.1.127 in the inside
network.
(2) The routing switch receives the connection request and creates a new translation item to allocate the
next host 1.1.1.1 for the inside local IP address.
(3) The routing switch replaces the destination address with the selected actual address of the host, and
forwards the message.
(4) Host 1.1.1.1 receives the message and makes response.
(5) The routing switch receives the message and uses the inside local addresses and their port numbers,
the outside address and port number as keywords to check the NAT table. The routing switch then
transfers the source address to the address of the virtual host, and forwards the message.
(6) Next connection request invokes the routing switch to distribute address 1.1.1.2 for the inside local
address. To configure the destination address transfer, run the following commands in global
configuration mode. These commands permit to map one virtual host to multiple real hosts. Each TCP
session with the virtual host will be transferred to the sessions with different real hosts.
Run... To...
ip nat pool name start-ip end-ip
netmask
Define an address pool containing the addresses
of real hosts.
ip access-list standard
access-list-name permit source
[source-mask]
Define an access table permitting addresses of
virtual hosts.
ip nat inside destination list
access-list-name pool name
Create a dynamic inside target transfer
mechanism and confirm the previously defined
access list.
interface type number
Specify the inside interface.