disable mplex by default

beacon_node/lighthouse_network/src/config.rs

@@ -128,7 +128,7 @@ pub struct Config {
     /// Whether to subscribe to the EIP-8025 `execution_proof` gossip topic.
     pub enable_execution_proof: bool,
 
-    /// Whether to enable the mplex multiplexer alongside yamux. Enabled by default.
+    /// Whether to enable the mplex multiplexer alongside yamux. Disabled by default.
     pub enable_mplex: bool,
 
     /// Configuration for the outbound rate limiter (requests made by this node).
@@ -369,7 +369,7 @@ impl Default for Config {
             metrics_enabled: false,
             enable_light_client_server: true,
             enable_execution_proof: false,
-            enable_mplex: true,
+            enable_mplex: false,
             outbound_rate_limiter_config: None,
             invalid_block_storage: None,
             inbound_rate_limiter_config: None,

beacon_node/src/cli.rs

@@ -393,9 +393,9 @@ pub fn cli_app() -> Command {
                 .value_name("BOOLEAN")
                 .action(ArgAction::Set)
                 .num_args(0..=1)
-                .default_value("true")
+                .default_value("false")
                 .default_missing_value("true")
-                .help("Enables the mplex multiplexer alongside yamux. Yamux is preferred when both are available. Enabled by default; set to \"false\" to disable.")
+                .help("Enables the mplex multiplexer alongside yamux. Yamux is preferred when both are available. Disabled by default; set to \"true\" to enable.")
                 .display_order(0)
         )
         .arg(

book/src/help_bn.md

@@ -86,8 +86,8 @@ Options:
           both IPv4 and IPv6. Defaults to `port6`
       --enable-mplex [<BOOLEAN>]
           Enables the mplex multiplexer alongside yamux. Yamux is preferred when
-          both are available. Enabled by default; set to "false" to disable.
-          [default: true]
+          both are available. Disabled by default; set to "true" to enable.
+          [default: false]
       --enable-partial-columns [<BOOLEAN>]
           Enable partial messages for data columns. This can reduce the amount
           of data sent over the network. Enabled by default on Hoodi and

lighthouse/tests/beacon_node.rs

@@ -2813,11 +2813,11 @@ fn invalid_block_roots_default_mainnet() {
 }
 
 #[test]
-fn enable_mplex_default() {
+fn disable_mplex_default() {
     CommandLineTest::new()
         .run_with_zero_port()
         .with_config(|config| {
-            assert!(config.network.enable_mplex);
+            assert!(!config.network.enable_mplex);
         })
 }