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In this section:

Table of Contents
maxLevel4

Overview

Excerpt

The 

Spacevars
0product3
 communicates with the external PSX over the Management Interface and Packet Interface. The 
Spacevars
0product3
 can choose any alternate IP addresses attached to the Packet Interface to communicate with the external PSX over the Management Interface and/or Packet Interface.

The communication between the

Spacevars
0product3
and the external PSX follows a sequence, as described below:

  1. The 

    Spacevars
    0product
     requests registration and receives response from PSX.

  2. The 

    Spacevars
    0product
     periodically sends request to know the status of external PSX.

  3. The 

    Spacevars
    0product
     requests for policy and receives response.

  4. The 

    Spacevars
    0product
     requests for de-registration and receives response.

The

Spacevars
0product
global configuration includes an optional metaVariable field (ipVar) to fetch an IP address from the PSX for use in connecting with the PSX. When the ipVar field is blank, the 
Spacevars
0product
 picks any random IP address from the configured interface to connect with the PSX.

 Additionally, the interfaceIpAddress field is added to the policyServer 'show' command to identify the IP address the

Spacevars
0product3
uses to communicate with the PSX for the specified Policy Server.


Preliminary Steps

Login to the CLI and perform the following steps to view the current default ACL statistics and metaVariable data before configuring the 

Spacevars
0product3
 to use alternate IP addresses.

Info
titleNote
Port number 3055 is used as default for D+ query. In the below example, the Source IP Address is fd00:10:6b50:41c0::d/128 (3055) and the Destination IP Address is displayed as *, since Destination IP is not configured.
StepAction
1

Enter the following command to view the default ACL statistics (see Example 1 for example results):

show table addressContext default ipAccessControlList defaultAclStatistics

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The Diameter Server (DS) protocol is used for communication between the 

Spacevars
0product3
 and external PSX. The default Access Control List (ACL) for DS process is created over Management (MGT).

2

Enter the following command to view the IP addresses associated with the corresponding metaVariable (see Example 2 for example results). 

show table system metaVariable

 

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Example 1
Example 1
Example 1:
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Example 2
Example 2
Example 2:
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Procedure

set system policyServer localServer PSX_LOCAL_SERVER mode outOfService 
set system policyServer localServer PSX_LOCAL_SERVER state disabled 
set system policyServer remoteServer parrotpsx ipAddress fd00:10:6b50:41c0::d 
set system policyServer remoteServer parrotpsx ipAddress 10.54.28.13 
set system policyServer remoteServer parrotpsx action force state enabled mode active
[ok] 
Commit complete
StepAction
1

Configure alternate IP address of metaVariable to the ipVar

Enter the following command to associate the alternate IP address of metaVariable to the ipVar in globalConfig. This allows communication to the external PSX using the IP address that is provided by the metaVariable (ipVar).

code

 

set system policyServer globalConfig type ip addressContext default ipInterfaceGroup S_DsbcSig_IG3 ipVar PKT0_V03_ALT_IP_02.IP
[ok]
Commit complete
2

Configure the SBC for an external PSX

Enter the following commands to enable the external PSX.

Code Block
3

Display the configured ipVar

Enter the following command to view the default ACL statistics. The default ACL for the DS process entry contains the destination IP address with the IP address provided by the metaVariable configured in ipVar field .

show table addressContext default ipAccessControlList defaultAclStatistics

 

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4

Display the external PSX global configuration

Enter the following command to view the external PSX global configuration:

show system policyServer globalConfig

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5

Display the PSX status

Once the external PSX is enabled, use the following command to view the PSX status:

show table system policyServer policyServerStatus

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6

Display the interface IP address over which the

Spacevars
0product
communicates with the PSX

Enter the following command to view the new interfaceIpAddress entry and the associated IP address (configured in ipVar field) provided by the metaVariable. In this example, interfaceIpAddress is associated with IP address (fd00:10:6b50:4d71::75).

 
show status system policyServer policyServerStatus

 

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7

Verify successful communication between the configured SBC and PSX

Once the IP address is configured for

Spacevars
0product
 and PSX communication, perform the following verification steps.

  1. Login to the 
    Spacevars
    0product
     as a root user.

  2. Execute the following TShark command:
    tshark -i pkt0.310 -f "port 3055"

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  3. Execute the following command to verify the operational state of the remote server:
    show status system policyServer policyServerStatus

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    In this sample output, the operState is Active. The operState mode should always be displayed as Active/Standby/Alternate and not as Down when the policy server's state is enabled and mode is inservice.

 

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