eriRouterIcrHoldTime sets, in seconds, how long this node waits without receiving a keepalive from its ICR peer before declaring that peer lost and triggering a state transition. It directly controls failover speed: a shorter hold time detects peer loss faster but risks false failovers from transient packet loss. For instance, leaving eriRouterIcrHoldTime at its default of 10 seconds means the standby node waits 10 seconds of silence before assuming the active peer has failed and preparing to take over.