WP_REDIS_PATH not working in wp-config

Hey Till,

after moving our multisite to a new Server, we cant get the Redis Plugin to work again.
Redis runs on Unix socket /run/redis_spiegx/redis.sock

in wp-config I have:
define( ‘WP_REDIS_PATH’, ‘/run/redis_spiegx/redis.sock’ ); // Path to your Redis Unix socket

Plugin stillgives:
Connection refused [tcp://127.0.0.1:6379]

Redis is up and running:
redis-cli -s /run/redis_spiegx/redis.sock
Ping
=> PONG

Do I miss something here in my config?

Thanks for hlep,

Frank