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The SBC Core supports Rx interface which pertains to QoS resource reservation for reserving bandwidth in the IP access network. The Rx reference point is used to exchange application level session information between the Policy and Charging Rules Function (PCRF) and the P-CSCF. The Access Solution, acting as P-CSCF creates a TCP connection with the configured PCRF.

Use the Diameter Node object to configure the Diameter Realm for external QoS requests on a per-IP TG basis.


The SBC 52x0 and SBC 7000 systems support creating IP Interface Groups containing sets of IP interfaces that are not "processor friendly" (i.e. carried on physical Ethernet ports served by separate processors). However, restrictions exist regarding the usage of such Interface Groups.

(This ability does not apply to the SBC 51x0 and SBC 5400 systems which have only two physical media ports. IP interfaces from the two physical ports may be configured within the same IP Interface Groups without restriction.)

For complete details, refer to Configuring IP Interface Groups and Interfaces.

When configuring a Diameter Node in an HA configuration, the secondaryOriginHost parameter must be configured with the Standby hostname.

Do not configure PCRF on the Egress leg of the trunk group for REGISTER.


Command Syntax

% set addressContext <addressContext_name> diamNode <diameterNode_name>
	dumpPdu <disabled | enabled>
	ipInterfaceGroupName <IPIG_name> 
	ipV4Address <IPv4 address towards peer> 
	ipV6Address <IPv6 address towards peer> 
	originRealm <origin realm name> 
	peer <peer_name>
		deviceWatchdogTimer <0-100000 ms>
		deviceWatchdogTimerAnswerTimeout <1000-500000 ms>
		fqdn <1-256 characters> 
		ipAddress <IP address> 
		state <disabled | enabled> 
		tcpPort <#> 
	primaryOriginHost <primary host name> 
	realmRoute <realmRoute_name> 
		appId <rf | rx> 
		peer <name> 
		priority <0-100> 
		realm <name> 
		state <disabled | enabled> 
	secondaryOriginHost <secondary host name> 
	state <disabled | enabled> 
	transactionTimeout <500-6000 milliseconds>

Command Parameters

Table : Diameter Node Parameters






Diameter node name.


When this flag is enabled, the SBC logs the DIAMETER PDU sent and received on the Rx interface to the debug log.

  • disabled (default)
  • enabled



The name of the IP interface group used by this Node.



IPv4 address used to create connections towards peer.



IPv6 address used to create connections towards peer.



The origin realm for this node.



Use this parameter to define the Diameter peer configuration for this node.

  • deviceWatchdogTimer – Device-Watchdog-Requests timer value, in milliseconds (range: 0-100000 / default=1000).
  • deviceWatchdogTimerAnswerTimeout – The Device Watchdog Answer timeout value, in milliseconds. SBC considers a peer down if a Device Watchdog Request is not replied to by a Device Watchdog Answer before this timer expires. (range: 1000-500000 | default = 2000)
  • fqdn – FQDN for this peer (1-256 characters).
  • ipAddress – IP Address of this peer.
  • sessionDistribution – Use this parameter to specify how to distribute Diameter sessions.
    • honor-reply-order (default) – Diameter session creation across multiple IP connections under this peer honors the order of the IP addresses that are returned in the DNS reply starting from the first one.

    • round-robin – Diameter session creation across multiple IP connections under this peer are rotated in round-robin fashion starting from the first one.

  • state – Admin state of this peer.
    • disabled (default)
    • enabled
  • tcpPort – TCP port number of this peer (default is 3868).



The primary origin host for this node.



<realmRoute name> – Realm route for this node. Additional realm route arguments:

  • appId – Application ID for this route.
    • rf
    • rx (Default is rx for PCRF interface, and is not configurable)
    peer – The name of the peer this route belongs to.
  • priority – Priority of this Route. (range 0-100 / default = 0)
  • realm – Realm name of this route.
  • state– Administrative state of this peer.
    • disabled (default)
    • enabled



The secondary origin host for this node.



Use this flag to set the state of this Diameter node.

  • disabled (default)
  • enabled



Enter desired transaction timeout in milliseconds. (default = 1000)

Command Example

Example Diameter Node configuration:

% set addressContext ADDR_CONTEXT_1 diamNode diam ipInterfaceGroupName LIG1 ipV4Address ipV6Address fe80::210:6bff:fe03:231 originRealm pcscf-open-ims.test primaryOriginHost katie secondaryOriginHost eleanor transactionTimeout 1500

Mandatory parameters:

  1. At least one IP address is required (ipV4Address or ipV6Address)
  2. diamNode name
  3. primaryOriginHost name
  4. ipInterfaceGroupName
  5. originRealm name

Default Values:

  • state = disabled
  • transactionTimeout = 1000 ms

Example Peer Configuration:

% set addressContext ADDR_CONTEXT_1 diamNode diam peer ipAddress fqdn tcpPort 4868

Mandatory parameters:

  1. fqdn
  2. ipAddress
  3. peer name

Default values:

  • state = disabled
  • tcpPort = 3868

Example Realm Route Configuration:

% set addressContext ADDR_CONTEXT_1 diamNode diam realmRoute realm peer appId rx priority 1

Mandatory parameters:

  1. peer name
  2. realm
  3. realmRoute name

Default values:

  • appId = rx (for PCRF interface)
  • state = disabled
  • priority = 0

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