- Added CONFIG_BOOTP_DNS2 and CONFIG_BOOTP_SEND_HOSTNAME to CONFIG_BOOTP_MASK.

1 files changed, 24 insertions, 0 deletions

diff --git a/README b/README
index efd4693306..fb2529aac9 100644
--- a/README
+++ b/README
@@ -901,6 +901,29 @@ The following options need to be configured:
 		4th and following
 		BOOTP requests:		delay 0 ... 8 sec
 
+- DHCP Advanced Options:
+		CONFIG_BOOTP_MASK
+
+		You can fine tune the DHCP functionality by adding
+		these flags to the CONFIG_BOOTP_MASK define:
+
+		CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS
+		serverip from a DHCP server, it is possible that more
+		than one DNS serverip is offered to the client.
+		If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
+		serverip will be stored in the additional environment
+		variable "dnsip2". The first DNS serverip is always
+		stored in the variable "dnsip", when CONFIG_BOOTP_DNS
+		is added to the CONFIG_BOOTP_MASK.
+
+		CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable
+		to do a dynamic update of a DNS server. To do this, they
+		need the hostname of the DHCP requester.
+		If CONFIG_BOOP_SEND_HOSTNAME is added to the
+		CONFIG_BOOTP_MASK, the content of the "hostname"
+		environment variable is passed as option 12 to
+		the DHCP server.
+
 - Status LED:	CONFIG_STATUS_LED
 
 		Several configurations allow to display the current
@@ -2118,6 +2141,7 @@ depending the information provided by your boot server:
 
   bootfile	- see above
   dnsip		- IP address of your Domain Name Server
+  dnsip2	- IP address of your secondary Domain Name Server
   gatewayip	- IP address of the Gateway (Router) to use
   hostname	- Target hostname
   ipaddr	- see above