Router Advertisement

man/dnsmasq.8

@@ -529,14 +529,18 @@ The optional
 sets an alphanumeric label which marks this network so that
 dhcp options may be specified on a per-network basis. 
 When it is prefixed with 'tag:' instead, then its meaning changes from setting
-a tag to matching it. Only one tag may be set, but more than one tag may be matched.
+a tag to matching it. Only one tag may be set, but more than one tag
+may be matched.
+
 The end address may be replaced by the keyword 
 .B static
 which tells dnsmasq to enable DHCP for the network specified, but not
 to dynamically allocate IP addresses: only hosts which have static
 addresses given via 
 .B dhcp-host
-or from /etc/ethers will be served. The end address may be replaced by
+or from /etc/ethers will be served. 
+
+The end address may be replaced by
 the keyword
 .B proxy
 in which case dnsmasq will provide proxy-DHCP on the specified
@@ -546,6 +550,14 @@ and
 .B pxe-service
 for details, applies to IPv4 only.)
 
+The end address may be replaced by
+the keyword
+.B ra-only
+which tells dnsmasq to offer Router Advertisement only on this subnet,
+and not DHCP. This applies to IPv6 only, see
+.B enable-ra
+for details.
+
 The interface:<interface name> section is not normally used. See the
 NOTES section for details of this.
 .TP
@@ -1234,6 +1246,20 @@ added into dnsmasq's DNS view. This flag suppresses that behaviour,
 this is useful, for instance, to allow Windows clients to update
 Active Directory servers. See RFC 4702 for details. 
 .TP
+.B --enable-ra
+Enable dnsmasq's IPv6 Router Advertisement feature. DHCPv6 doesn't
+handle complete network configuration in the same way as DHCPv4. Router
+discovery and (possibly) prefix discovery for autonomous address
+creation are handled by a different protocol. When DHCP is in use,
+only a subset of this is needed, and dnsmasq can handle it, using
+existing DHCP configuration to provide most data. When RA is enabled,
+dnsmasq will advertise a prefix for each dhcp-range, with default
+router and recursive DNS server as the relevant link-local address on 
+the machine running dnsmasq. The "managed address" bits are set,
+except for a dhcp-range which is marked as "ra-only". In which case RA
+is provided by no DHCPv6 service and the managed address bits are
+cleared.
+.TP
 .B --enable-tftp[=<interface>]
 Enable the TFTP server function. This is deliberately limited to that
 needed to net-boot a client. Only reading is allowed; the tsize and