Some updates to Lighthouse book

book/src/advanced_networking.md

@@ -125,6 +125,8 @@ nodes that do not run directly on a public network.
 
 ### Configuring Lighthouse to listen over IPv4/IPv6/Dual stack
 
+Since Lighthouse v7.0.0, Lighthouse listens to both IPv4 and IPv6 by default. This means that dual-stack is enabled by default. To disable listening on IPv6, use the `--disable-ipv6` flag.
+
 To listen over only IPv6 use the same parameters as done when listening over
 IPv4 only:
 
@@ -136,24 +138,9 @@ TCP and UDP.
   If the specified port is 9909, QUIC will use port 9910 for IPv6 UDP connections.
   This can be configured with `--quic-port`.
 
-To listen over both IPv4 and IPv6:
-
-- Set two listening addresses using the `--listen-address` flag twice ensuring
-  the two addresses are one IPv4, and the other IPv6. When doing so, the
-  `--port` and `--discovery-port` flags will apply exclusively to IPv4. Note
-  that this behaviour differs from the IPv6 only case described above.
-- If necessary, set the `--port6` flag to configure the port used for TCP and
-  UDP over IPv6. This flag has no effect when listening over IPv6 only.
-- If necessary, set the `--discovery-port6` flag to configure the IPv6 UDP
-  port. This will default to the value given to `--port6` if not set. This flag
-  has no effect when listening over IPv6 only.
-- If necessary, set the `--quic-port6` flag to configure the port used by QUIC for
-  UDP over IPv6. This will default to the value given to `--port6` + 1. This flag
-  has no effect when listening over IPv6 only.
-
 #### Configuration Examples
 
-> When using `--listen-address :: --listen-address 0.0.0.0 --port 9909`, listening will be set up as follows:
+> When using `--port 9909`, listening will be set up as follows:
 >
 > **IPv4**:
 >
@@ -165,7 +152,7 @@ To listen over both IPv4 and IPv6:
 > It listens on the default value of --port6 (`9000`) for both UDP and TCP.
 > QUIC will use port `9001` for UDP, which is the default `--port6` value (`9000`) + 1.
 
-> When using `--listen-address :: --listen-address --port 9909 --discovery-port6 9999`, listening will be set up as follows:
+> When using `--port 9909 --discovery-port6 9999`, listening will be set up as follows:
 >
 > **IPv4**:
 >