In an SSR High Availability (HA) deployment, two different communication paths are used:

1. Router → Conductor communication
2. Conductor ↔ Conductor communication

1. Router → Conductor Communication (Ports 4505/4506)

Routers (SSR nodes) use Salt traffic over ports 4505 and 4506 to communicate with the conductors.

This communication is used for:

• Configuration sync
• Device registration
• status reporting

2. Conductor ↔ Conductor Communication (Salt + ZooKeeper)

The conductors also communicate with each other to maintain HA functionality.

This internal communication uses:

• Salt (4505/4506)
• ZooKeeper (2888/3888)
• HA heartbeats

This path is responsible for:

• Cluster coordination
• HA leadership election