Manual Chapter : Load Balancing

Applies To:

  • BIG-IP LTM

    15.1.10, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0, 14.0.1, 14.0.0, 13.1.5, 13.1.4, 13.1.3, 13.1.1, 13.1.0

Updated Date: 07/07/2026

Load Balancing

  • Route SIP control messages, without modifying SIP headers.
  • The following headers can be configured to be automatically modified.
    • VIA Header inserted
    • Record Router Header inserted
    • Decrementing max forwards
  • Any header attribute can be modified via iRule.
  • Natively route messages based on:
    • From URI
    • To URI
    • Request URI
    • Originating Virtual Server
  • Route messages via iRule on any attribute of the message.
  • Response routing natively using data added to the inserted VIA Header.
  • Response routing available via iRule:
    • Add private header to request
    • Insertion of VIA Header to request via iRule
    • Route to upstream device using received VIA Header
    • Remember data from request processing
  • Bi-directional persistence support.
    • Persistence key selection via configuration or custom key via iRule
  • Connection Re-Use Support
  • High Availability (HA)
    • Connection mirroring
    • Persistence table replication