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doc: Add a man page for B.A.T.M.A.N. adv. interfaces

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Signed-off-by: Maximilian Wilhelm <max@sdn.clinic>
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Maximilian Wilhelm 2020-10-06 03:55:55 +02:00
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interfaces-batman(5)
# NAME
*interfaces-batman* - B.A.T.M.A.N. adv. extensions for the interfaces(5)
file format
# DESCRIPTION
Better Approach To Mobile Ad-Hoc Networking (B.A.T.M.A.N.) advanced is
a mesh protocol which provides an Ethernet overlay network over an
Ethernet underlay. The overlay interface is called _meshif_ whereas
underlay interfaces are called _hardif_.
It's supported in the Linux kernel and thus available in many Linux
environments. The ifupdown-ng exectuor relies on the *batctl* tool
being installed. Support for setting interface based hop-penalties
required Linux Kernel 5.8 or later.
B.A.T.M.A.N. adv. adds 30-60 bytes of encapsulation overhead depending
on wether netword coding is activated or not. This should be taken into
consideration when setting up overlay networks, particularly on underlay
networks with a conventional 1500 byte MTU.
See https://www.open-mesh.org/projects/open-mesh/wiki for more details
and updates.
The following options allow to set up B.A.T.M.A.N. adv. interfaces.
# BATMAN-RELATED OPTIONS
*batman-ifaces* _list of interfaces_
Specifies the underlay interfaces (hardifs) which should be
configured for the B.A.T.M.A.N. adv. meshif defined within
the iface stanza.
*batman-hop-penalty* _hop-penalty_
The _hop-penalty_ defines the cost of traversing a node or an
interface. The _hop-penalty_ is a numeric value between 0 and
255. Historically a _hop-penalty_ could only be set on a meshif,
since B.A.T.M.A.N adv. v2020.3 (included in Kernel 5.8) it can
also be set on a per-interfaces (hardif) basis.
*batman-gw-mode* _gw-mode_
Denotes the gateway mode which controls the role this node will
play within this B.A.T.M.A.N. adv. instance. The mode can be
_off_, _client_, or _server_.
*batman-distributed-arp-table* _mode_
Activates or deactivates the Distributed ARP table (DAT) within
this B.A.T.M.A.N. adv. instance. Valid values are _enable_ and
_disable_.
*batman-multicast-mode* _mode_
Activates or deactivates the multicast mode of this B.A.T.M.A.N.
adv. instance. Valid values are _enable_ and _disable_.
# EXAMPLES
A B.A.T.M.A.N. adv. _meshif_:
```
auto bat-pad-cty
iface bat-pad-cty
batman-ifaces dummy-pad-cty vlan1234
batman-hop-penalty 5
#
hwaddress f2:00:c1:01:00:00
mtu 1500
```
A B.A.T.M.A.N. adv. member interfaces (_hardif_):
```
auto vlan1234
iface vlan1234
mtu 1560
batman-hop-penalty 10
```
# SEE ALSO
*batctl*(8)
# AUTHORS
Maximilian Wilhelm <max@sdn.clinic>

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@ -126,6 +126,11 @@ The *use* keyword designates that an _option_ should be used.
This system is extendable by additional packages, but the
most common options are:
*batman*
The interface is a B.A.T.M.A.N. adv. mesh interface.
Configuration of B.A.T.M.A.N. adv. interfaces requires the
*batctl* untiliy to be installed.
*bond*
The interface is a bonded interface. Configuration
of bonded interfaces requires the *bonding* package
@ -191,6 +196,7 @@ iface eth0
# SEE ALSO
*interfaces-bond*(5)
*interfaces-batman*(5)
*interfaces-vrf*(5)
*interfaces-vxlan*(5)