eriRouterIcrPriority sets whether this ICR node prefers to become the active or standby member of the resilient pair, choosing between low and high, and is used as the tie-breaker when both chassis boot simultaneously. The two paired nodes must be configured with different priorities so the negotiation has a deterministic outcome instead of a race condition. For example, an admin would set the primary chassis to high and its standby partner to low so the primary always wins the active role after a simultaneous power-up.