Technical data

Brocade ServerIron ADX Advanced Server Load Balancing Guide 21
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SIP SLB over TCP
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Connection handling with SIP requests initiated by proxy server
Topologies involving back-to-back user agent (B2BUA) are also supported.
Figure 8 shows how the ServerIron ADX performs reverse source NAT on SIP server-initiated traffic.
FIGURE 8 SIP proxy server-initiated SIP requests
Load balancing modes
The ServerIron ADX can be enabled in one of the following modes while performing TCP SIP server
load balancing:
• Stateless: The system maintains an internal hash table to ensure SIP call persistence.
• Stateful: The system creates session table entries to ensure SIP call persistence.
Global SIP over TCP commands
Use the server sip tcp max-client-tcp-connections command to configure the maximum number of
TCP-based client connections.
ServerIronADX(config)#server sip tcp max-client-tcp-connections 25
Syntax: [no] server sip tcp max-client-tcp-connections #-of-connections
The #-of-connections variable can be from 1 through 64 connections, which specifies the
maximum number of concurrent TCP connections that ServerIron ADX can actively open to a
specific event.
Use the server sip max-server-tcp-connections command to configure the maximum number of
TCP-based server connections.
ServerIronADX(config)#server sip max-server-tcp-connections 25
Syntax: [no] server sip max-server-tcp-connections #-of-connections
The #-of-connections variable can be from 1 through 64 connections, which specifies the
maximum number of concurrent TCP connections that ServerIron ADX can actively open to a
specific server.