Espressif ESP32-S2 Programming Manual page 1179

Chapter 2. API Reference
CONFIG_LWIP_IPV6_RDNSS_MAX_DNS_SERVERS
Use IPv6 Router Advertisement Recursive DNS Server Option
Found in: Component config
Use IPv6 Router Advertisement Recursive DNS Server Option (as per RFC 6106) to copy a defined
maximum number of DNS servers to the DNS module. Set this option to a number of desired DNS
servers advertised in the RA protocol. This feature is disabled when set to 0.
Default value:
• 0 if CONFIG_LWIP_IPV6_AUTOCONFIG
CONFIG_LWIP_IPV6_DHCP6
Enable DHCPv6 stateless address autoconfiguration
Found in: Component config
Enable DHCPv6 for IPv6 stateless address autoconfiguration. Note that the dhcpv6 client has to be
started using dhcp6_enable_stateless(netif); Note that the stateful address autoconfiguration is not sup-
ported.
Default value:
• No (disabled) if
CONFIG_LWIP_NETIF_STATUS_CALLBACK
Enable status callback for network interfaces
Found in: Component config
Enable callbacks when the network interface is up/down and addresses are changed.
Default value:
• No (disabled)
CONFIG_LWIP_NETIF_LOOPBACK
Support per-interface loopback
Found in: Component config
Enabling this option means that if a packet is sent with a destination address equal to the interface's
own IP address, it will "loop back"and be received by this interface.
Default value:
• Yes (enabled)
Contains:
• CONFIG_LWIP_LOOPBACK_MAX_PBUFS
CONFIG_LWIP_LOOPBACK_MAX_PBUFS
Max queued loopback packets per interface
Found in: Component config
Configure the maximum number of packets which can be queued for loopback on a given interface.
Reducing this number may cause packets to be dropped, but will avoid filling memory with queued
packet data.
Range:
• from 0 to 16
Default value:
Espressif Systems
> LWIP
> LWIP
CONFIG_LWIP_IPV6_AUTOCONFIG
> LWIP
> LWIP
> LWIP > CONFIG_LWIP_NETIF_LOOPBACK
1168
Submit Document Feedback
Release v4.4