Radware Alteon - UDP-Based SIP Servers; Configuring SIP Server Load Balancing

Alteon Application Switch Operating System Application Guide
Load Balancing Special Services
326 Document ID: RDWR-ALOS-V2900_AG1302
11. Increase the timeout for idle sessions.
Note: SIP sessions are quite long and data may be flowing while the signaling path is idle.
Because Alteon resides in the signaling path, Radware recommends increasing the real server
session timeout value to 30 minutes (Default: 10 minutes).
12. Configure the virtual service for RPC load balancing.
13. Enable server and client processing at the port level.
14. Apply and save your changes.
UDP-Based SIP servers
SIP processing provides the capability to scan and hash calls based on a SIP Call-ID header to a SIP
server. The Call-ID uniquely identifies a specific SIP session. Future messages from the same Call-ID
are switched to the same SIP server. This involves stateful inspection of SIP messages.
SIP is a text-based protocol with header lines preceding the content. Like HTTP, the first header line
has the method specification followed by the other header lines that specify other parameters like
Call-ID, and so on.
Configuring SIP Server Load Balancing
Figure 51 - SIP Load Balancing Configuration Example, page 327 illustrates an Alteon performing
UDP-based SIP SLB. In this example, three SIP proxy servers are configured in a Real Server Group
100. Alteon is configured for SIP service (port 5060) for virtual server 40.40.40.100.
>> # /cfg/slb/real 1/tmout 30
(Increase Real 1 session timeout)
>> # /cfg/slb/real 2/tmout 30
(Increase Real 2 session timeout)
>> # /cfg/slb/real 3/tmout 30
(Increase Real 3 session timeout)
>> /cfg/slb/virt/service 135
>>Virtual Server 1 135 service #group 1
>> # /cfg/slb/port 25
(Select the client port)
>>SLB port 25# client ena
(Enable client processing)
>>SLB port 25# /cfg/slb/port 5
(Select the server port)
>>SLB port 5# server ena
(Enable server processing)
>>SLB port 5# /cfg/slb/port 6
(Select the server port)
>>SLB port 6# server ena
(Enable server processing)
>>SLB port 6# /cfg/slb/port 7
(Select the server port)
>>SLB port 7# server ena
(Enable server processing)
>> SLB port 7# apply
>> SLB port 7# save