Dell 3-DNS Dokumentacja Pobierz pdf (Strona 208)

Chapter 4: Configuring the High-Level Network

4-128

•If you enable snat automap on more than one self IP address, (implying

more than one IP network), the following rules apply:

• If the connection is handled by a non-forwarding virtual server, the

translation address is the self IP address that matches the IP network

of the node selected by load balancing.

• If the connection is handled by a forwarding virtual server or no

virtual server, the translation address is the self IP address that

matches the IP network of the next hop to the destination.

• If there are no self addresses that match the IP network of the node or

the next hop, any self IP address on the VLAN is eligible.

To add a SNAT using the automapping feature, you must complete two

procedures:

• Enable the snat automap attribute on any self IP addresses.

• Add the SNAT, specifying the Automap feature.

The following sections explain these procedures.

To enable the snat automap attribute on a self IP address

from the command line

When you enable automapping to add a SNAT, the translation address that

the BIG-IP maps to an individual node or a VLAN is the self IP address.

Thus, prior to enabling automapping for the node or VLAN, you must

enable the snat automap attribute on the self IP address. This is done from

the command line, using the following syntax:

b self <self IP address> snat automap enable

For example, if you have the two self IP addresses 192.168.217.14 and

192.168.217.15, the following commands enable the snat automap attribute

on those self IP addresses:

b self 192.168.217.14 snat automap enable

b self 192.168.217.15 snat automap enable

Later, when you add a SNAT using automapping, the BIG-IP maps either of

those self IP addresses to the original node (or VLAN) that you specify.

As another example, the following command enables the snat automap

attribute on the self IP address 10.0.0.1, for the VLAN named external:

b self 10.0.0.1 vlan external snat automap enable

For more information, see To add an automapped SNAT from the command

line, on page 4-129.

To add an automapped SNAT using the Configuration

utility

The Configuration utility allows you to define one SNAT for one or more

original IP addresses, where the original IP address can be either a specific

node address or a VLAN name.

1. In the navigation pane, click NATs.

The NATs screen displays.

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