Configuring RNAT with LLB

September 21, 2020

Contributed by:

S C

To configure RNAT by using the command line interface

You can configure an LLB setup for reverse network address translation (RNAT) for outbound traffic. This ensures that the return network traffic for a specific flow is routed through the same path. First configure basic LLB, as described in“Configuring a Basic LLB Setup”, and then configure RNAT as described inConfigure RNAT. You must then enable use subnet IP (USNIP) mode.

In the following diagram, the Citrix ADC appliance uses LLB to route outbound traffic to different links. During the RNAT operation, the ADC appliance replaces the source IP addresses of the outbound traffic with the public NAT IP address (198.141.23.1) to route the traffic through ISP-1. Similarly, the ADC appliance replaces the source IP addresses with 198.140.23.1 to route the traffic through ISP-2.

RNAT with LLB

To add SNIPs for ISP routers by using the command line interface

At the command prompt, type:

add NS IP   -type SNIP add NS IP   -type SNIP

Example:

              add ns ip 10.140.23.1 255.255.255.0 -type snip add ns ip 10.141.23.1 255.255.255.0 -type snip 
             

To configure RNAT by using the command line interface

At the command prompt, type:

set rnat   show rnat

Example:

              set rnat 10.102.29.0 255.255.255.0 -natIP 10.140.23.1 set rnat 10.102.29.0 255.255.255.0 -natIP 10.141.23.1 show rnat 1) Network: 10.102.29.0 Netmask: 255.255.255.0 NatIP: 10.140.23.1 2) Network: 10.102.29.0 Netmask: 255.255.255.0 NatIP: 10.141.23.1 
             

To configure RNAT by using the configuration utility

Navigate toSystem>Network>NATs.
On theRNATtab, clickConfigure RNAT.
Specify the network on which to perform RNAT.

Note

You can also configure RNAT by using Access Control Lists (ACLs). ReferConfiguring RNATfor details.

To enable Use Subnet IP mode by using the command line interface

At the command prompt, type:

enable ns mode USNIP show ns mode

Example:

              enable ns mode USNIP show ns mode Mode Acronym Status ------- ------- ------ 1) Fast Ramp FR ON 2) …. 8) Use Subnet IP USNIP ON 9) … 
             

To enable Use Subnet IP mode by using the configuration utility

Navigate toSystem>Settingsand, underModes and Features, clickConfigure Modes.
In theConfigure Modesdialog box, selectUse Subnet IP, and then clickOK.

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Configuring RNAT with LLB

September 21, 2020

Contributed by:

S C

September 21, 2020

Contributed by:

S C

Configuring RNAT with LLB

To configure RNAT by using the command line interface

To add SNIPs for ISP routers by using the command line interface

To configure RNAT by using the command line interface

To configure RNAT by using the configuration utility

To enable Use Subnet IP mode by using the command line interface

To enable Use Subnet IP mode by using the configuration utility

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