Manualshelf

Technical data

ManualsBrandsBrocade Communications Systems ManualsHome Theater ServerServerIron ADX 12.4.00
11121314151617181920
6 ServerIron ADX Advanced Server Load Balancing Guide
53-1002435-01
SIP SLB and Call Persistence using ServerIron ADX
1
Max-Forwards
The Max-Forwards header field must be used with any SIP method to limit the number of proxies or
gateways that can forward the request to the next downstream server.
The Max-Forwards value is an integer in the range 1-255 indicating the remaining number of times
that a request message is allowed to be forwarded. The recommended initial value is 70.
SIP SLB and Call Persistence using ServerIron ADX
Figure 2 shows an overview of a ServerIron SIP Server Load Balancing implementation.
FIGURE 2 ServerIron SIP Server Load Balancing implementation
There are three kinds of SIP servers:
• proxy server
• redirect server, and
• registrar server.
In Figure 2, the ServerIron SIP load balancer (SIP Server Load Balancing) uses the Domain-1 VIP to
load balance SIP requests from Client A (user1) or Client B (user2) among Domain 1 proxy servers
and registrar servers.
The SIP Server Load Balancing uses the Domain-2 VIP to load balance SIP requests from Client A
(user1) or Client B (user2) among Domain 2 proxy servers and registrar servers.
The ServerIron offers support for the following SIP servers in accordance with RFC 3261: