Diameter native proxy request has no eligible peer

Logged when a Diameter backend cannot select a member of diameter_peer_group for a forwarded request. A member is not eligible when it has no Open connection that negotiated the request's application, its connection is suspect after an unanswered watchdog, its service-level objective has degraded it, it already appears in the request's Route-Record, it is the connection the request arrived on, or an earlier attempt for the same request already failed on it. A no_fallback group never selects another member after a failure. diameter_proxy_attempt is initial when no member was available at all and failover when no remaining member could take over a failed attempt. Radiator Server answers the request with DIAMETER_UNABLE_TO_DELIVER (3002).

Check the connection state, watchdog events, and capability exchange of the peer group's members and the preceding Diameter connection events. See peer group selection.