Avaya VF 3000 사용자 설명서

 

TC; Reviewed: 
PV 04/24/2006 

Avaya – Proprietary 

Use as authorized only pursuant to your signed agreement or 

Avaya policy. No other disclosure is permitted or authorized. 

6 of 61 

HT3-LSP-VF.doc 

 

architecture that may occur.  This is similar to Figure 1, except that the data center uses public 
IP addressing.  There is no need for a NAT function between the WAN and the data center in this 
case. 
 

 
The Juniper VF 3000 SBC proxies the VoIP traffic for the components located at the enterprise 
sites and presents all the VoIP traffic to the Avaya Communication Manager with the same IP 
address – that of the Juniper VF 3000 SBC inside interface. The Juniper VF 3000 SBC maps all 
enterprise IP addresses to this one IP address, and uses different transport layer port numbers to 
distinguish between each IP address.  The Juniper VF 3000 SBC is not capable of using multiple 
inside IP addresses.  This means that if all the LSPs in a given enterprise network are presented 
to Avaya Communication Manager through the Juniper VF 3000 SBC, the LSPs will all have the 
same IP address. However, Avaya Communication Manager is not designed to distinguish LSPs 
by port number – but only by unique IP addresses. Therefore, with the current releases of Juniper 
VF 3000 SBC and Avaya Communication Manager using the architectures shown in Figures 1-
2, LSP registration must bypass the Juniper VF 3000 SBC. 
 
An Avaya Communication Manager Green feature (“SA8853 – Support of LSPs behind NAT”) 
has been developed to allow the registration of LSPs to Avaya Communication Manager in a 
way that does not require the ALG function of the Juniper VF 3000 SBC. Figure 3 depicts the 
solution architecture when applied to the architecture shown in Figure 1. Note that a separate 
NAT/FW device (FW is firewall) has been added to the edge of the data center for LSP-related 
traffic only. Also, the NAT function for the LSP in the enterprise site is being handled differently 
than for the other components there. A static NAT entry is needed for each LSP.