Hi Ajeet,
On 2013-09-12 15:36, ajeet singh wrote:
I am trying to test network coding functionality of batman-adv. I am
facing some problems.
Please find my topology information,
I created network with three nodes ( ad-hoc),
Node A --- Node B --- Node C
I did following settings,
--- Complied latest batman-adv. with NC enabled.
--- I did all setting form
http://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding
--- Kept all nodes in promiscuous mode. (Nodes are working properly in
this mode).
When I started iperf (TCP) from node A to node C, Node B stopped
responding after few seconds. B is not sending OGM to A and C.
When I tested without NC everything work fine.
Is there any additional settings required for NC test?
As we figured out on IRC, the problems were caused by the ath9k_htc
chip/driver, which does not handle packet sizes larger than 1500 bytes
that well. So changing the MTU of your bat0 interface to something like
1480 solved the problem.
It is a bit weird though, cause my personal experience says that
ath9k_htc can handle packets up to 1550 bytes, which batman-adv+NC
shouldn't exceed. Maybe a quick inspection with tcpdump/wireshark can
give us some numbers?
// Martin
--
Kind Regards
Martin Hundebøll
Frederiks Allé 99, 1.th
8000 Aarhus C
Denmark
+45 61 65 54 61
[email protected]
