Provided by: mobilemesh_1.0-6_i386
mmborder - Mobile Mesh Border Discovery
mmborder -a addr [-d file] [-f file] [-h] -i ifname [-vz]
mmborder speaks the Mobile Mesh Border Discovery Protocol. The goal of
a border router is to take advantage of "collateral flow" that occurs
"external" to a Mobile Mesh Routing Protocol cloud. This is
accomplished by border routers tunneling packets between peer border
routers. A tunnel is needed between each pair of members. The IP
addresses on the ends of the tunnels do not need to be globally unique
across the Internet, they only need to be unique within the Mobile Mesh
Routing Protocol cloud. This enables us to use the private IP addresses
of 10.X.X.X and 192.168.X.X for the tunnels.
Tunnels are set up automatically by mmborder when it discovers a peer
border router. The discovery process requires each border router to
periodically send a BorderAdvertisement message to a multicast group
address. When a border hears from a new peer, it sets up a point to
point tunnel with it. When a border has not heard from a peer within a
deadInterval , it assumes the peer has departed and tears down the
Under Linux, each tunnel results in a unique IP interface. When a
tunnel is created, mmborder dynamically adds the corresponding IP
interface to the mobile mesh router mmrp. Similary, when the tunnel is
destroyed, mmborder dynamically removes the IP interface from the
mobile mesh router.
mmborder recognizes the following command line switches:
The dotted decimal unique private IP address for tunnel
interfaces. A separate point to point tunnel interface is set up
to each discovered peer border router. Each of these tunnels
shares this address.
Use flags ’file’ to enable debug output.
Use config ’file’ instead of /etc/mobilemesh/mmborder.conf. See
below for a description of the config file format.
When launching mmdiscover on a newly created tunnel interface,
use config ’file’ instead of default /etc/mobilemesh/mmdiscover-
border.conf. See manpage for mmdiscover for a description of
the config file format.
-h Display a help message.
The name of the fixed network interface that discovery of other
border routers will take place on.
-v Display version information.
-z Run in the foreground instead of running as a daemon.
Config File Format
By default, mmborder reads the file /etc/mobilemesh/mmborder.conf for
configuration parameters. The format of the config file requires each
configuration parameter to be on its own line. Comments may be placed
in the file by beginning a line with a #. The following configuration
parameters are recognized:
groupAddr <Multicast Group Address>
the IP multicast group address which all border routers use to
send and receive BorderAdvertisement messages.
port <Udp Port Number>
the UDP port number to which all BorderAdvertisment messages are
mmrpPort <Udp Port Number>
the UDP port number used by mmrp. This allows multiple copies
of mmrp to execute simultaneously and mmborder to connect to the
adPeriod <unsigned int value>
the number of seconds between sending our BorderAdvertisement
deadInterval <unsigned int value>
the number of seconds after hearing the last BorderAdvertisement
from a peer to declare the peer down and tear down any tunnels
that went to it.
mmdiscover(8), mmrp(8), mmrpviz(8)
This program and documentation was written by Kevin H. Grace of The
MITRE Corporation <email@example.com>. Credit is also given to Mike
Butler who developed some of the support classes and lent his keen
July 19, 2000 MMBORDER(8)