Repository : ssh://git@open-mesh.org/doc

On branches: backup-redmine/2017-07-13,master

commit 6cbcf5804f961726032fada73299b9486b3d5b65 Author: Simon Wunderlich sw@simonwunderlich.de Date: Sun Jan 25 15:53:04 2009 +0000

doc: batman-adv/Wiki

6cbcf5804f961726032fada73299b9486b3d5b65 batman-adv/Wiki.textile | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+)

diff --git a/batman-adv/Wiki.textile b/batman-adv/Wiki.textile new file mode 100644 index 00000000..6cf92ffd --- /dev/null +++ b/batman-adv/Wiki.textile @@ -0,0 +1,43 @@ += batman-advanced = + +Batman-advanced is a new approach to wireless networking which +does no longer operate on the IP basis. Unlike B.A.T.M.A.N, which exchanges +information using UDP packets and sets routing tables, batman-advanced operates +on ISO/OSI Layer 2 only and uses and routes (or better: bridges) Ethernet Frames. +It emulates a virtual network switch of all nodes participating. Therefore all nodes +appear to be link local, thus all higher operating protocols won't be affected +by any changes within the network. You can run almost any protocol above B.A.T.M.A.N. +Advanced, prominent examples are: IPv4, IPv6, DHCP, IPX. + +=== Pros and Cons === +Pros: + * supports any Ethernet-capable protocol (IPv4, IPv6, ARP, DHCP ...) + * no manual IP assignment, just use DHCP + * easy integration of attached networks (no manual HNA fiddling), just put the bat0 in the bridge with your other devices. You can for example build a roaming network of Access Points with this technique. + * Not affected by your Firewall (but you can secure the payload traffic, of course) +Cons: + * no gateway handling. +=== battools === + +Since the nodes participating in the B.A.T.M.A.N. Advanced switch are +completely transparent for all protocols above layer 2, we needed to build +our own diagnostic tools, the battools. These tools contain a layer 2 version +of ping, traceroute and tcpdump. Further information can be found in the +enclosed README file. + +=== Userland vs Kernelland === + +The userland implementation of batman-advanced was a proof of concept implementation to verify that the concept is +working. Unfortunately, switching packets in userland is very expensive in terms of cycles, as each packet has to be +read() and write() to the kernel and back, which limits the sustainable bandwidth especially on low-end devices. +To have good support for these devices as well, we implemented batman-adv as a kernel driver, which is now the +preferred version. It can be controlled via the /proc file system and works transparently, offering the same service +and being compatible to the userland version. + +=== Documentation === + +We're working on it. No, really ;). + +=== Get it === + +see the [wiki:Download] page \ No newline at end of file