Running Architect v2024.3.1 across fifteen BYOC trunks. Primary routing works fine, but the credential rotation script hits a wall when it touches the Ohio failover pool. Admin API v2 call to PATCH /v2/trunks/byoc/{trunkId}/credentials throws a 403 FORBIDDEN with COMPLIANCE_TLS_CERT_MISMATCH. The payload expects a specific certificate chain for the fallback SIP proxy, but the Ohio carrier only pushes an intermediate cert that doesn’t match the compliance policy template.
You’ll see the console stuck on the Data Action node waiting for the trunk health check. Flow times out after thirty seconds. SIP registration drops to zero on the secondary pool. It’s not a standard carrier quirk. The compliance dashboard flags it as a PCI-DSS audit gap because the outbound routing table tries to bind the old cert hash during the failover window.
Tried forcing TLS 1.3 on the trunk settings. Didn’t help. The routing API still returns the mismatch error. Logs point to SIP_REGISTRATION_FAILED: CERT_CHAIN_INCOMPLETE. Eastern peak hours make this a real headache. Doing jack all to fix the cert chain without tripping the compliance guardrails. Need to know if there’s a way to whitelist the intermediate cert chain, or if the API endpoint just needs a different request header.
{
"error": "COMPLIANCE_TLS_CERT_MISMATCH",
"details": "Certificate chain validation failed for trunk OH-FB-04. Expected root CA matches but intermediate issuer differs from policy template v2.1.",
"timestamp": "2024-11-14T15:32:11Z",
"request_id": "req_88a7c21f-9b44-4e1a-8c21-77f9d00e3a12"
}
This smells like a classic webhook delivery failure masquerading as a trunk config error. The COMPLIANCE_TLS_CERT_MISMATCH on a 403 usually means the Genesys platform’s internal compliance check is failing to validate the signature or chain before it even hits your BYOC proxy. You’re likely missing the root CA in the trust store that the Ohio carrier expects.
Don’t just patch the credentials endpoint. Check the event delivery logs for the specific webhook associated with that trunk’s status updates. If the signature validation fails there, the API call gets blocked upstream. Here’s how to verify the chain:
# Fetch the current cert chain for the Ohio trunk
curl -X GET "https://api.mypurecloud.com/api/v2/trunks/byoc/{trunkId}/credentials" \
-H "Authorization: Bearer <access_token>" \
-H "Content-Type: application/json"
Look for the certificateChain field. If it’s truncated, you’ll need to append the intermediate CA. Also, check your retry policy. Genesys defaults to 3 retries with exponential backoff. If the Ohio proxy is slow, the webhook might time out, causing the API to throw a generic 403 instead of a 504.
Try updating the webhook configuration to include the full chain:
{
"url": "https://your-webhook-endpoint.com/status",
"headers": {
"X-Custom-Auth": "your-key"
},
"retryPolicy": {
"maxRetries": 5,
"backoffMultiplier": 2
}
}
If that doesn’t fix it, check the dead letter queue for any dropped events related to this trunk. The issue might be that the Ohio carrier is rejecting the TLS handshake due to a missing SAN extension in the cert. You’ll need to regenerate the cert with the correct SANs.