12 Feb
2015
12 Feb
'15
10:55 p.m.
Le 12/02/2015 13:08, Andrey Utkin a écrit :
2015-02-12 22:33 GMT+02:00 Tristan Mahé
<t.mahe(a)b-and-c.net>et>:
The thing with UDP fragmentation is that it depends on the routers in
the path, I've seen a lot of fw able to deal with TCP frag, but not with
UDP...
If the TCP tunnel resolves the issue, then you know where the issue lies
and what to do to resolve it ( propose a pull request with support of tcp ).
Let us know the results of your tests, it's interesting !
Hi,
bad checksum may be caused by the virtual network adapter that does not
perform hardware checksum. I had this issue on a kvm test setup.
MTU is to be looked at, as udp does not handle very well packet
fragmentation ( to say the least ). Could you reproduce the same issue
using an openvpn tcp virtual link between your two servers ?
Hi, and thanks for
your comment.
Will definitely try VPN, I just wonder why is it so that
udp does not handle very well packet
fragmentation ( to say the least )
? My first action was to fill a ticket at
rtpengine, but developers
replied to me that this mechanism is known to be reliable, and that
they don't consider adding TCP version of interface. I haven't tested
this case on a lot of different networks, but for now this issue seems
specific to Amazon.
Anyway, will try with tunnel (which is, howevre, a workaround, not a solution).