if NET
+config ARP_TIMEOUT
+ int "Milliseconds before trying ARP again"
+ default 5000
+
+config NET_RETRY_COUNT
+ int "Number of timeouts before giving up"
+ default 5
+ help
+ This variable defines the number of retries for network operations
+ like ARP, RARP, TFTP, or BOOTP before giving up the operation.
+
config PROT_UDP
bool "Enable generic udp framework"
help
Enable a generic udp framework that allows defining a custom
handler for udp protocol.
+config BOOTDEV_ETH
+ bool "Enable bootdev for ethernet"
+ depends on BOOTSTD
+ default y
+ help
+ Provide a bootdev for ethernet so that is it possible to boot
+ an operationg system over the network, using the PXE (Preboot
+ Execution Environment) protocol.
+
config BOOTP_SEND_HOSTNAME
bool "Send hostname to DNS server"
help
config NET_RANDOM_ETHADDR
bool "Random ethaddr if unset"
help
- Selecting this will allow the Ethernet interface to function
- even when the ethaddr variable for that interface is unset.
- A new MAC address will be generated on every boot and it will
- not be added to the environment.
+ Selecting this will allow the Ethernet interface to function even
+ when the ethaddr variable for that interface is unset. In this case,
+ a random MAC address in the locally administered address space is
+ generated. It will be saved to the appropriate environment variable,
+ too.
config NETCONSOLE
bool "NetConsole support"
used for reassembly, and thus an upper bound for the size of
IP datagrams that can be received.
+config SYS_FAULT_ECHO_LINK_DOWN
+ bool "Echo the inverted Ethernet link state to the fault LED"
+ help
+ Echo the inverted Ethernet link state to the fault LED. Note, if
+ this option is active, then CONFIG_SYS_FAULT_MII_ADDR also needs to
+ be configured.
+
config TFTP_BLOCKSIZE
int "TFTP block size"
default 1468
almost-MTU block sizes.
You can also activate CONFIG_IP_DEFRAG to set a larger block.
+config TFTP_PORT
+ bool "Set TFTP UDP source/destination ports via the environment"
+ help
+ If this is defined, the environment variable tftpsrcp is used to
+ supply the TFTP UDP source port value. If tftpsrcp isn't defined,
+ the normal pseudo-random port number generator is used.
+
+ Also, the environment variable tftpdstp is used to supply the TFTP
+ UDP destination port value. If tftpdstp isn't defined, the normal
+ port 69 is used.
+
+ The purpose for tftpsrcp is to allow a TFTP server to blindly start
+ the TFTP transfer using the pre-configured target IP address and UDP
+ port. This has the effect of "punching through" the (Windows XP)
+ firewall, allowing the remainder of the TFTP transfer to proceed
+ normally. A better solution is to properly configure the firewall,
+ but sometimes that is not allowed.
+
config TFTP_WINDOWSIZE
int "TFTP window size"
default 1
receiving response from main DHCP server. Has no effect if
SERVERIP_FROM_PROXYDHCP is false.
+config KEEP_SERVERADDR
+ bool "Write the server's MAC address to 'serveraddr'"
+ default y if SANDBOX
+ help
+ Keeps the server's MAC address, in the env 'serveraddr'
+ for passing to bootargs (like Linux's netconsole option). If this is
+ enabled, when an ARP reply is received, the server's IP address is
+ written there.
+
+config UDP_CHECKSUM
+ bool "Check the UDP checksum"
+ default y if SANDBOX
+ help
+ Enable this to verify the checksum on UDP packets. If the checksum
+ is wrong then the packet is discarded and an error is shown, like
+ "UDP wrong checksum 29374a23 30ff3826"
+
+config BOOTP_SERVERIP
+ bool "Use the 'serverip' env var for tftp, not bootp"
+ help
+ Enable this if the TFTP server will be the 'serverip' environment
+ variable, not the BOOTP server. This affects the operation of both
+ bootp and tftp.
+
+config BOOTP_MAX_ROOT_PATH_LEN
+ int "Option 17 root path length"
+ default 64
+ help
+ Select maximal length of option 17 root path.
+
+config USE_GATEWAYIP
+ bool "Set a default 'gateway' value in the environment"
+ help
+ Defines a default value for the IP address of the default router
+ where packets to other networks are sent to. (Environment variable
+ "gatewayip")
+
+config GATEWAYIP
+ string "Value of the default 'gateway' value in the environment"
+ depends on USE_GATEWAYIP
+
+config USE_IPADDR
+ bool "Set a default 'ipaddr' value in the environment"
+ help
+ Define a default value for the IP address to use for the default
+ Ethernet interface, in case this is not determined through e.g.
+ bootp. (Environment variable "ipaddr")
+
+config IPADDR
+ string "Value of the default 'ipaddr' value in the environment"
+ depends on USE_IPADDR
+
+config USE_NETMASK
+ bool "Set a default 'netmask' value in the environment"
+ help
+ Defines a default value for the subnet mask (or routing prefix) which
+ is used to determine if an IP address belongs to the local subnet or
+ needs to be forwarded through a router. (Environment variable "netmask")
+
+config NETMASK
+ string "Value of the default 'netmask' value in the environment"
+ depends on USE_NETMASK
+
+config USE_ROOTPATH
+ bool "Set a default 'rootpath' value in the environment"
+
+config ROOTPATH
+ string "Value of the default 'rootpath' value in the environment"
+ depends on USE_ROOTPATH
+ default "/opt/nfsroot"
+
+config USE_SERVERIP
+ bool "Set a default 'serverip' value in the environment"
+ help
+ Defines a default value for the IP address of a TFTP server to
+ contact when using the "tftboot" command. (Environment variable
+ "serverip")
+
+config SERVERIP
+ string "Value of the default 'serverip' value in the environment"
+ depends on USE_SERVERIP
+
+config PROT_TCP
+ bool "TCP stack"
+ help
+ Enable a generic tcp framework that allows defining a custom
+ handler for tcp protocol.
+
+config PROT_TCP_SACK
+ bool "TCP SACK support"
+ depends on PROT_TCP
+ help
+ TCP protocol with SACK. SACK means selective acknowledgements.
+ By turning this option on TCP will learn what segments are already
+ received. So that it improves TCP's retransmission efficiency.
+ This option should be turn on if you want to achieve the fastest
+ file transfer possible.
+
+config IPV6
+ bool "IPv6 support"
+ help
+ Enable IPv6 support. It includes Neighbour Discovery protocol, ICMPv6
+ and auxiliary stuff to make it work. Since it is enabled u-boot
+ network subsystem can get and handle incoming packets and send packets
+ through IPv6 network. It allows to use environment variables such as
+ ip6addr, serverip6. If a u-boot command is capable to parse an IPv6
+ address and find it, it will force using IPv6 in the network stack.
+
endif # if NET
+
+config SYS_RX_ETH_BUFFER
+ int "Number of receive packet buffers"
+ default 4
+ help
+ Defines the number of Ethernet receive buffers. On some Ethernet
+ controllers it is recommended to set this value to 8 or even higher,
+ since all buffers can be full shortly after enabling the interface on
+ high Ethernet traffic.