SIP persistence engine
modulename: ip_vs_pe_sip.ko
configname: CONFIG_IP_VS_PE_SIP
Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>IP virtual server support
└─>SIP persistence engine
In linux kernel since version 2.6.37 (release Date: 2011-01-04)
Allow persistence based on the SIP Call-ID