gRPC Keepalive Limits: Idle-Connection PING Frames Behind Load Balancers
gRPC channels can use HTTP/2 PING frames as a keepalive mechanism, letting a client detect a dead connection within a configured timeout instead of waiting for a long transport-level failure. The decision on the table is whether to enable keepalive on long-lived channels that traverse a managed load balancer or NAT gateway. Two documented constraints shape t