update headings

docs/how-to/ipv6-support.md

@@ -6,28 +6,29 @@ sidebar_position: 13
 
 # IPv6 support
 
-You can configure Teku to listen over IPv4, [IPv6](#listen-over-only-ipv6), or [both (dual-stack)](#listen-over-both-ipv4-ipv6).
+You can configure Teku to listen over IPv4, [IPv6](#configure-ipv6-listening), or [both (dual-stack)](#configure-dual-stack-listening).
 
-## Listen over only IPv6
+## Configure IPv6 listening
 
-To configure Teku to listen only on IPv6, set the [`--p2p-interface`](../reference/cli/index.md#p2p-interface-p2p-interfaces) CLI option to `::`. The [`--p2p-port`](../reference/cli/index.md#p2p-port) and [`--p2p-udp-port`](../reference/cli/index.md#p2p-udp-port) CLI options will be used for the p2p and discovery ports, similar to listening over IPv4 only.
+To configure Teku to listen only over IPv6 addresses, set the [`--p2p-interface`](../reference/cli/index.md#p2p-interface-p2p-interfaces) CLI option to `::`. 
+Use the [`--p2p-port`](../reference/cli/index.md#p2p-port) and [`--p2p-udp-port`](../reference/cli/index.md#p2p-udp-port) CLI options for the p2p and discovery ports, similar to listening over only IPv4 addresses.
 
-## Listen over both IPv4 and IPv6 
+## Enable dual-stack support
 
-To configure Teku to listen over both IPv4 and IPv6, also known as dual-stack support, set the [`--p2p-interface`](../reference/cli/index.md#p2p-interface-p2p-interfaces) CLI option to `0.0.0.0,::` for both IPv4 and IPv6 listening addresses. 
+To configure Teku to listen over both IPv4 and IPv6 addresses, also known as dual-stack support, set the [`--p2p-interface`](../reference/cli/index.md#p2p-interface-p2p-interfaces) CLI option to `0.0.0.0,::` for both IPv4 and IPv6 listening addresses. 
 In this setup, the [`--p2p-port`](../reference/cli/index.md#p2p-port) and [`--p2p-udp-port`](../reference/cli/index.md#p2p-udp-port) options apply to the IPv4 address. The [`--p2p-port-ipv6`](../reference/cli/index.md#p2p-port-ipv6) and [`--p2p-udp-port-ipv6`](../reference/cli/index.md#p2p-udp-port-ipv6) options apply to the IPv6 address.
 
-After dual-stack support is enabled, Teku uses port `9000` for both TCP and UDP on IPv4, and port `9090` for both TCP and UDP on IPv6 by default.
+After enabling dual-stack support, Teku defaults to using port `9000` for both TCP and UDP on IPv4 and port `9090` for both TCP and UDP on IPv6.
 
-## Advertise only IPv6 address
+## Advertise only the IPv6 address
 
 To advertise only the IPv6 public address to the network, use the [`--p2p-advertised-ip`](../reference/cli/index.md#p2p-advertised-ip-p2p-advertised-ips) CLI option. 
 This is similar to advertising an IPv4 address. Configure the advertised port using the [`--p2p-advertised-port`](../reference/cli/index.md#p2p-advertised-port) CLI option. 
-It uses the value set in [`--p2p-port`](../reference/cli/index.md#p2p-port) by default.
+By default, the port uses the value set in [`--p2p-port`](../reference/cli/index.md#p2p-port).
 
-## Advertise both IPv4 and IPv6 addresses (Dual-stack)
+## Advertise both IPv4 and IPv6 addresses
 
-To advertise both the IPv4 and IPv6 public addresses to the network, use the [`--p2p-advertised-ips`](../reference/cli/index.md#p2p-advertised-ip-p2p-advertised-ips) CLI option and provide the two addresses separated by a comma. 
+To advertise both the IPv4 and IPv6 public addresses to the network, use the [`--p2p-advertised-ips`](../reference/cli/index.md#p2p-advertised-ip-p2p-advertised-ips) CLI option and provide the two addresses, separated by a comma. 
 Configure the advertised port for the IPv4 address using the [`--p2p-advertised-port`](../reference/cli/index.md#p2p-advertised-port) option. 
 Configure the advertised port for the IPv6 address using the [`--p2p-advertised-port-ipv6`](../reference/cli/index.md#p2p-advertised-port-ipv6) option. 
-This port is set to the value of [`--p2p-port-ipv6`](../reference/cli/index.md#p2p-port-ipv6) by default.
+By default, the port is set to the value specified in [`--p2p-port-ipv6`](../reference/cli/index.md#p2p-port-ipv6).