From 08bac337b0a1f2844bbaeabf6a3a6030cdfeea50 Mon Sep 17 00:00:00 2001 From: Marcin Siodelski Date: Tue, 23 Jun 2015 17:21:29 +0200 Subject: [PATCH] [3740] Small update to the User Guide (DHCPINFORM) --- doc/guide/dhcp4-srv.xml | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/doc/guide/dhcp4-srv.xml b/doc/guide/dhcp4-srv.xml index b355c63065..f61c49bb4f 100644 --- a/doc/guide/dhcp4-srv.xml +++ b/doc/guide/dhcp4-srv.xml @@ -590,9 +590,10 @@ temporarily override a list of interface names and listen on all interfaces. relies on the low level functions of an operating system to build the data link, IP and UDP layer of the outgoing message. Typically, the OS will first use ARP to obtain the client's link layer address to be - inserted into the frame's header. When the ARP exchange is successful, - the DHCP message can be unicast to the client, using the address - obtained. + inserted into the frame's header, if the address is not cached from + the previous transaction that the client had with the server. + When the ARP exchange is successful, the DHCP message can be unicast + to the client, using the address obtained. Some system administrators block ARP messages in their network, -- 2.47.2