@node MCD
+@cindex MCD
+@cindex multicast discovery
@unnumbered MultiCast Discovery
MCD is an addition to online @ref{Sync, synchronization protocol}, that
@itemize
@item
- @ref{nncp-daemon} sends multicast messages about its presence from
- time to time. See @ref{CfgMCDSend, mcd-send} configuration option.
+ @command{@ref{nncp-daemon}} sends multicast messages about its
+ presence from time to time. See @ref{CfgMCDSend, mcd-send}
+ configuration option.
@item
- When @ref{nncp-caller} sees them, it adds them as the most
+ When @command{@ref{nncp-caller}} sees them, it adds them as the most
preferred addresses to already known ones. If MCD address
announcement was not refreshed after two minutes -- it is removed.
See @ref{CfgMCDListen, mcd-listen} and
@end verbatim
Magic number is @verb{|N N C P D 0x00 0x00 0x01|} and sender is 32-byte
-identifier of the node. It is sent as UDP packet on IPv6 @verb{|ff02::1|}
-multicast address (all hosts in the network) and hard-coded @strong{5400}
-port. Operating system will use IPv6 link-local address as a source one,
-with the port taken from @command{nncp-daemon}'s @option{-bind} option.
-That way, IP packet itself will carry the link-scope reachable address
-of the daemon.
+identifier of the node. It is sent as UDP packet on IPv6
+@strong{@verb{|ff02::4e4e:4350|}} (hexadecimal ASCII @verb{|NNCP|})
+multicast address and @strong{5400} port. Operating system will use IPv6
+link-local address as a source one, with the port taken from
+@command{@ref{nncp-daemon}}'s @option{-bind} option. That way, IP packet
+itself will carry the link-scope reachable address of the daemon.