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-rw-r--r--README24
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