Thanks Guru. For some reason openstack was creating tap interfaces on compute with an MTU of 1500,where as for all other virtual/physical devices its 9000.After changing mtu of tap ,everything is good now.Thanks alot
On Fri, Nov 3, 2017 at 11:30 PM, Guru Shetty <[email protected]> wrote: > > > On 2 November 2017 at 13:07, kevin parrikar <[email protected]> > wrote: > >> Hello All, >> I am running OVS 2.6.1 on Ubuntu 14.04 kernel 4.4.0-87-generic with >> Openstack Mitaka release with OVS firewall driver(contrack ) >> >> >> MTU is set to 9000 on both the physical nics and icmp is success with >> ping -Mdo -s 8000 flag >> how ever tcp and udp streams are too slow. >> >> > If you are using tunnels, reduce the MTU of the inner packet by the amount > of tunnel header. > > >> TCP >> >> iperf -c 192.168.111.202 >> ------------------------------------------------------------ >> Client connecting to 192.168.111.202, TCP port 5001 >> TCP window size: 92.6 KByte (default) >> ------------------------------------------------------------ >> [ 3] local 192.168.111.199 port 44228 connected with 192.168.111.202 >> port 5001 >> [ ID] Interval Transfer Bandwidth >> [ 3] 0.0-927.7 sec 175 KBytes 1.54 Kbits/sec >> >> UDP >> >> iperf -s -u >> ------------------------------------------------------------ >> Server listening on UDP port 5001 >> Receiving 1470 byte datagrams >> UDP buffer size: 122 KByte (default) >> ------------------------------------------------------------ >> [ 3] local 192.168.111.202 port 5001 connected with 192.168.111.199 port >> 45028 >> [ ID] Interval Transfer Bandwidth Jitter Lost/Total >> Datagrams >> [ 3] 0.0-10.0 sec 1.25 MBytes 1.05 Mbits/sec 0.086 ms 0/ 893 >> (0%) >> >> Any idea where could be the issue. >> >> Regards, >> Kevin >> >> >> >> _______________________________________________ >> discuss mailing list >> [email protected] >> https://mail.openvswitch.org/mailman/listinfo/ovs-discuss >> >> >
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