3.9.2. Service Information 
The OpenSIPS Load Balancer is part of the OpenScape 4000 SoftGate
software package and will be installed with each OpenScape 4000 SoftGate.
It runs on a OpenScape 4000 SoftGate but has its own IP address (different
from the IP address of the OpenScape 4000 SoftGate). The IP address is
configured during installation.
Using its configured IP addresses, the Load Balancer automatically
fetches its available DNS server names from the DNS server.
The "Load Balancing" feature is deactivated by default and must be
activated with the WBM of the OpenScape 4000 SoftGate and the WBM of
every participating gateway.
Features
- "Load Balancing" for inbound native SIP trunks towards virtual HG 3500 gateways (OpenScape 4000 SoftGate) and vxWorks based HG 3500 gateways (IPDA) (e.g. SIP Provider or OpenScape UC connectivity).
- Native SIP trunks without registration.
- Virtual HG 3500s of several OpenScape 4000 SoftGates and HG 3500 gateways of several access points can participate in Load Balancing.
- Error logging / tracing with OpenSIPS.
- Security of data communication between vHG 3500/HG 3500 and OpenSIPS (via authenticated https).
- Failover mechanism for inbound calls, which have been rejected by the gateway with an error response.
- Status monitoring of configured gateways by the Open SIPS Load Balancer.
- Load Balancing for several gateway groups.
- SPE supports TLS 1.2 protocol.
- SPE features include: Enforce Secure Renegotiation RFC, TLS renegotiation certificate revocation list, maximum re-keying interval and minimum RSA key length.
Requirements
- A OpenScape 4000 SoftGate must be available within the network.
- SIP Load Balancing can only be activated if the use of SIP trunking profiles is activated
in the
WBM.
WBM > Configuration > Voice Gateway > SIP Trunk Profile Parameter
- For SIP Load Balancing to function, you must ensure that the (outbound) proxy settings
in the
SIP trunking profile are correctly configured.
WBM > Configuration> Voice Gateway > SIP Trunk Profile Parameter
Restrictions
- The “SIP Load Balancing” feature can be used for Standalone or Surv. SoftGate deployments. This means, it is not available for e.g. “Integrated SoftGate” on Enterprise Gateway or Duplex.
- SIP Load Balancer supports a maximum of 2000 parallel channels.
- If TLS is used all connected Gateways need to be configured using SPE too.