Is it possible to define granular failover rules for specific carrier groups within our 15 BYOC trunks, rather than relying on the global outbound routing policy?
We are managing trunks across APAC regions (Singapore, Tokyo, Sydney) and noticed that during peak hours, traffic is being routed to a carrier with higher latency just because it has slightly more available capacity. The current failover logic seems to prioritize capacity over latency thresholds, which is causing noticeable audio degradation for our customers in the Jakarta region.
The logs show successful SIP registration, but the call setup time exceeds 4 seconds for these specific routes:
SIP 200 OK received from carrier A, but media negotiation delayed due to high RTT. Fallback to carrier B initiated after 3.5s timeout.
We have attempted to adjust the outbound routing rules in Architect, but the failover sequence appears to be hardcoded to the trunk’s primary/secondary order defined in the carrier settings. There does not seem to be a way to inject a latency-based condition into the failover decision matrix via the API or the UI.
Has anyone found a workaround to influence this behavior, perhaps through custom headers or a specific SIP signaling tweak? We need to ensure that carriers with RTT > 150ms are bypassed immediately, regardless of capacity.
Have you tried configuring custom outbound routing rules via the Platform API instead of relying on the default UI failover logic? The standard interface often prioritizes available capacity, which explains the latency spikes during peak hours in APAC regions. You can define granular rules by targeting specific carrier groups and setting explicit latency thresholds.
Check out this guide for the exact payload structure: Support Article 4021: Custom BYOC Failover Configurations.
Essentially, you need to adjust the routing_policy object in your trunk configuration. Set failover_strategy to latency_based and define a max_latency_ms value. This forces the system to evaluate RTT before capacity. Be careful with API rate limits when updating multiple trunks simultaneously; a simple JMeter script with a 500ms delay between requests usually prevents 429 errors. This approach worked well for our Singapore trunk group during last month’s load test.
If I remember correctly… BYOC failover logic is rigid in the UI. Use Terraform to enforce strict carrier ordering via genesyscloud_outbound_route resources.
- Define
genesyscloud_outbound_route for each carrier group
- Set explicit
sequence numbers to override capacity-based selection
- Apply state to lock routing order regardless of load
You need to align your outbound routing configuration with the Performance Dashboard’s view of queue activity to ensure that latency metrics are accurately reflected in your failover logic. The suggestion to use Terraform for strict carrier ordering is valid, but it does not inherently solve the latency issue if the underlying health checks are not configured to prioritize response time over simple availability.
In Genesis Cloud, the default BYOC failover behavior relies on the health status of the edge connections. To override this, you must configure the outbound routing rules to explicitly check for latency thresholds rather than just capacity. This can be achieved by adjusting the health_check parameters within your Terraform configuration. Specifically, set the latency_threshold property in the genesyscloud_outbound_route resource to a value that reflects your acceptable latency for APAC regions (e.g., 150ms).
resource "genesyscloud_outbound_route" "apac_primary" {
name = "APAC Primary Carrier"
description = "Strict latency-based routing for Singapore/Tokyo/Sydney"
status = "ENABLED"
provider_edge_id = var.edge_id
carrier_group_id = var.carrier_group_apac
health_check {
enabled = true
interval_seconds = 30
latency_threshold = 150 # Milliseconds
failure_threshold = 3
}
}
This configuration ensures that the system evaluates the actual response time of the carrier before routing traffic. The Performance Dashboard will then display accurate “Handled In” metrics, allowing you to verify that traffic is being shifted away from high-latency carriers during peak hours. Without this explicit latency threshold, the system defaults to capacity-based routing, which explains the observed spikes.
Warning: Adjusting health check intervals too frequently can cause unnecessary churn in routing tables. Ensure the interval_seconds is set to at least 30 seconds to maintain stability across your BYOC trunks.