import of dnsmasq-2.19.tar.gz
diff --git a/FAQ b/FAQ
index dceb8d1..bd800cd 100644
--- a/FAQ
+++ b/FAQ
@@ -115,7 +115,7 @@
--expand-hosts and --domain-suffix options.
Q: Can I get dnsmasq to save the contents of its cache to disk when
- I shut my machine down and re-load when it starts again.
+ I shut my machine down and re-load when it starts again?
A: No, that facility is not provided. Very few names in the DNS have
their time-to-live set for longer than a few hours so most of the
@@ -299,7 +299,22 @@
dnsmasq ignores it until is times out and restarts the process.
To fix this, set the dhcp-authoritative flag in dnsmasq.
+Q: My laptop has two network interfaces, a wired one and a wireless
+ one. I never use both interfaces at the same time, and I'd like the
+ same IP and configuration to be used irrespcetive of which
+ interface is in use. How can I do that.
+A: By default, the identity of a machine is determined by using the
+ MAC address, which is associated with interface hardware. Once an
+ IP is bound to the MAC address of one interface, it cannot be
+ associated with another MAC address until after the DHCP lease
+ expires. The solution to this is to use a client-id as the machine
+ identity rather than the MAC address. If you arrange for the same
+ client-id to sent when either interface is in use, the DHCP server
+ will recognise the same machine, and use the same address. The
+ method for setting the client-id varies with DHCP client software,
+ dhcpcd uses the "-I" flag. Windows uses a registry setting,
+ see http://www.jsiinc.com/SUBF/TIP2800/rh2845.htm