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Commit e61a4b63 authored by Timo Teräs's avatar Timo Teräs Committed by David S. Miller
Browse files

ipv4: update ARPD help text 



Removed the statements about ARP cache size as this config option does
not affect it. The cache size is controlled by neigh_table gc thresholds.

Remove also expiremental and obsolete markings as the API originally
intended for arp caching is useful for implementing ARP-like protocols
(e.g. NHRP) in user space and has been there for a long enough time.

Signed-off-by: default avatarTimo Teras <timo.teras@iki.fi>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 125bb8f5

net/ipv4/Kconfig

+13 −22
Original line number Diff line number Diff line
@@ -273,29 +273,20 @@ config IP_PIMSM_V2 
	  you want to play with it.



config ARPD

	bool "IP: ARP daemon support (EXPERIMENTAL)"

	depends on EXPERIMENTAL

	bool "IP: ARP daemon support"

	---help---

	  Normally, the kernel maintains an internal cache which maps IP

	  addresses to hardware addresses on the local network, so that

	  Ethernet/Token Ring/ etc. frames are sent to the proper address on

	  the physical networking layer. For small networks having a few

	  hundred directly connected hosts or less, keeping this address

	  resolution (ARP) cache inside the kernel works well. However,

	  maintaining an internal ARP cache does not work well for very large

	  switched networks, and will use a lot of kernel memory if TCP/IP

	  connections are made to many machines on the network.



	  If you say Y here, the kernel's internal ARP cache will never grow

	  to more than 256 entries (the oldest entries are expired in a LIFO

	  manner) and communication will be attempted with the user space ARP

	  daemon arpd. Arpd then answers the address resolution request either

	  from its own cache or by asking the net.



	  This code is experimental and also obsolete. If you want to use it,

	  you need to find a version of the daemon arpd on the net somewhere,

	  and you should also say Y to "Kernel/User network link driver",

	  below. If unsure, say N.

	  The kernel maintains an internal cache which maps IP addresses to

	  hardware addresses on the local network, so that Ethernet/Token Ring/

	  etc. frames are sent to the proper address on the physical networking

	  layer. Normally, kernel uses the ARP protocol to resolve these

	  mappings.



	  Saying Y here adds support to have an user space daemon to do this

	  resolution instead. This is useful for implementing an alternate

	  address resolution protocol (e.g. NHRP on mGRE tunnels) and also for

	  testing purposes.



	  If unsure, say N.



config SYN_COOKIES

	bool "IP: TCP syncookie support (disabled per default)"