Dear all,
I am using the latest lxc version on Fedora 17, providing networking among the
containers using the ns-3 network simulator (following the configuration given
in
http://www.nsnam.org/wiki/index.php/HOWTO_Use_Linux_Containers_to_set_up_virtual_networks
adapted to 32 containers).
I am experiencing a problem with UDP networking in my p2p application. If I
launch 32 instances of the app (on different TCP and UDP ports) on the same
machine, it works as expected: a query on one of the instances reaches all of
the other instances and 32 results are returned. However, launching 32
instances each one in a different container, only two results are returned. It
seems that the query only reaches a subset of the instances, and only one of
these returns its local result to the instance issuing the query, which returns
this result and its own.
Here is the container configuration I am using:
lxc.utsname = host-1
lxc.network.type = veth
lxc.network.flags = up
lxc.network.link = br-1
lxc.network.ipv4 = 10.0.0.1/24
lxc.tty = 4
lxc.pts = 1024
the other containers are configured in the same way as host-2 and IP address
10.0.0.2/24 etc.
Is there any known issue related to UDP networking in lxc ? I understand that,
of course, the problem may be due to the ns-3 network simulation, but a few
specific UDP tests are working correctly as well (UPD echo server and client,
run on different pairs of containers). This is driving me crazy: apparently,
UDP networking is ok in the containers, but when I launch the app instances I
am experiencing the weird behavior described. Launching the instances on the
machine without the containers works correctly.
Any clue or suggestion ?
Thank you in advance.
With kind regards,
Massimo cafaro
-
*******************************************************************************************************
Massimo Cafaro, Ph.D. Additional affiliations:
Assistant Professor Euro-Mediterranean
Centre for Climate Change
Dept. of Engineering for Innovation SPACI Consortium
University of Salento, Lecce, Italy E-mail
massimo.caf...@unisalento.it
Via per Monteroni
massimo.caf...@cmcc.it
73100 Lecce, Italy
caf...@ieee.org
Voice/Fax +39 0832 297371
caf...@acm.org
Web http://sara.unisalento.it/~cafaro
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