Brocade Communications Systems ServerIron ADX 12.4.00 Manual de Serviço descarregar pdf (Página 13)

ServerIron ADX Advanced Server Load Balancing Guide 1

53-1002435-01

Chapter

SIP Server Load Balancing

SIP Overview

The Session Initiation Protocol (SIP) is a signaling protocol used by numerous IP communication

products to create session-oriented connections between two or more endpoints in an IP network.

SIP is emerging as the preferred technology for Voice over IP (VoIP) implementations.

Application-aware network switches play a vital role in increasing the uptime and availability of IP

based services such as VoIP. Many customers rely on this technology to meet mission-critical

application requirements. Together with advanced SIP intelligence, ServerIron switches offer highly

scalable, available, and secure load balancing infrastructure for SIP applications.

SIP is an application-layer protocol that can establish, modify, and terminate multimedia sessions,

such as Internet telephony. In this implementation, ServerIron SIP Server Load Balancing balances

SIP requests and responses, based on a call-ID.

SIP Server Load Balancing is based on a request and response transaction model that is similar to

HTTP. Each transaction consists of a request that invokes a particular method on the server, and at

least one response. The method is carried within the request message.

References

• SIP: Session Initiation Protocol - RFC 3261

http://www.ietf.org/rfc/rfc3261.txt?number=3261

SIP packet flow

Figure 1 demonstrates the basic operation of SIP signaling protocol; location of an end-point, signal

of a desire to communicate, negotiation of session parameters to establish the session, and

tear-down of the session after completion.

FIGURE 1 SIP packet flow

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 135 136

Sem comentários

Brocade Communications Systems ServerIron ADX 12.4.00 Manual de Serviço Página 13