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-rw-r--r--Documentation/nfsroot.txt12
1 files changed, 9 insertions, 3 deletions
diff --git a/Documentation/nfsroot.txt b/Documentation/nfsroot.txt
index 16a7cae2721d..9b956a969362 100644
--- a/Documentation/nfsroot.txt
+++ b/Documentation/nfsroot.txt
@@ -92,8 +92,14 @@ ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>
autoconfiguration.
The <autoconf> parameter can appear alone as the value to the `ip'
- parameter (without all the ':' characters before) in which case auto-
- configuration is used.
+ parameter (without all the ':' characters before). If the value is
+ "ip=off" or "ip=none", no autoconfiguration will take place, otherwise
+ autoconfiguration will take place. The most common way to use this
+ is "ip=dhcp".
+
+ Note that "ip=off" is not the same thing as "ip=::::::off", because in
+ the latter autoconfiguration will take place if any of DHCP, BOOTP or RARP
+ are compiled in the kernel.
<client-ip> IP address of the client.
@@ -142,7 +148,7 @@ ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>
into the kernel will be used, regardless of the value of
this option.
- off or none: don't use autoconfiguration (default)
+ off or none: don't use autoconfiguration
on or any: use any protocol available in the kernel
dhcp: use DHCP
bootp: use BOOTP