<div dir="ltr"><div><div>Hi,<br><br></div>I am having the following topology with gre tunnel. Whenever I start iperf with the BR1 IPs, I am 0 packets reaching the other side.<span style="font-family:monospace,monospace"><br></span><br></div><div>Topology<br><span style="font-family:monospace,monospace">---------<br><br></span></div><div>(10.0.0.10)BR1 BR0(192.168.1.10)-----(phyical link)---(192.168.1.11)BR0 BR1(10.0.0.11)<br><br></div><div>OVS logs<br><span style="font-family:monospace,monospace">---------</span><br><br><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"></span><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace">192.168.1.11<br>-------------------------------------------------<br></span></span></span></span># ovs-vsctl show </span><span style="font-family:monospace,monospace"><br>28ec0ec0-4d41-4ee0-a688-59363e990be2<br>    Bridge &quot;br1&quot;<br>        Port &quot;gre1&quot;<br>            Interface &quot;gre1&quot;<br>                type: gre<br>                options: {remote_ip=&quot;192.168.1.10&quot;}<br>        Port &quot;br1&quot;<br>            Interface &quot;br1&quot;<br>                type: internal<br>    Bridge &quot;br0&quot;<br>        Port &quot;br0&quot;<br>            Interface &quot;br0&quot;<br>                type: internal<br>        Port &quot;eth2&quot;<br>            Interface &quot;eth2&quot;<br>    ovs_version: &quot;2.0.2&quot;<br><br># ovs-ofctl dump-ports br1<br>OFPST_PORT reply (xid=0x2): 2 ports<br>  port  1: rx pkts=191, bytes=16192, drop=0, errs=0, frame=0, over=0, crc=0<br>           tx pkts=324, bytes=218080, drop=0, errs=0, coll=0<br>  port LOCAL: rx pkts=205, bytes=13834, drop=0, errs=0, frame=0, over=0, crc=0<br>           tx pkts=277, bytes=186885, drop=0, errs=0, coll=0<br># ovs-ofctl dump-ports br0<br>OFPST_PORT reply (xid=0x2): 2 ports<br>  port  1: rx pkts=1756592, bytes=2469177682, drop=0, errs=60, frame=0, over=0, crc=0<br>           tx pkts=2523136, bytes=3696929018, drop=0, errs=0, coll=0<br>  port LOCAL: rx pkts=228910, bytes=2358163654, drop=0, errs=0, frame=0, over=0, crc=0<br>           tx pkts=146232, bytes=3529991526, drop=0, errs=0, coll=0<br>root@ubuntu:/home/sanctum# </span><br><br><br><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace">192.168.1.10</span></span></span><br><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace">-------------------------------------------------<br></span></span></span></span></span></span></span></span><span style="font-family:monospace,monospace"># ovs-vsctl show</span><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"><span style="font-family:monospace,monospace"><br></span></span>3e0b4065-425b-4f76-b0b9-00ff062ca2b1<br>    Bridge &quot;br1&quot;<br>        Port &quot;br1&quot;<br>            Interface &quot;br1&quot;<br>                type: internal<br>        Port &quot;gre1&quot;<br>            Interface &quot;gre1&quot;<br>                type: gre<br>                options: {remote_ip=&quot;192.168.1.11&quot;}<br>    Bridge &quot;br0&quot;<br>        Port &quot;eth2&quot;<br>            Interface &quot;eth2&quot;<br>        Port &quot;br0&quot;<br>            Interface &quot;br0&quot;<br>                type: internal<br>    ovs_version: &quot;2.5.2&quot;</span><br><br><span style="font-family:monospace,monospace"># ovs-ofctl dump-ports br1<br>OFPST_PORT reply (xid=0x2): 2 ports<br>  port LOCAL: rx pkts=218, bytes=72490, drop=0, errs=0, frame=0, over=0, crc=0<br>           tx pkts=217, bytes=18021, drop=0, errs=0, coll=0<br>  port  2: rx pkts=247, bytes=20414, drop=0, errs=0, frame=0, over=0, crc=0<br>           tx pkts=268, bytes=103812, drop=0, errs=0, coll=0<br>root@ubuntusoekris3:/home/sanctumsoekris3# <br># ovs-ofctl dump-ports br0<br>OFPST_PORT reply (xid=0x2): 2 ports<br>  port LOCAL: rx pkts=172401, bytes=2357681766, drop=0, errs=0, frame=0, over=0, crc=0<br>           tx pkts=229444, bytes=3535382058, drop=0, errs=0, coll=0<br>  port  1: rx pkts=5355249, bytes=7469372659, drop=0, errs=70, frame=0, over=0, crc=0<br>           tx pkts=3193175, bytes=4052911200, drop=0, errs=0, coll=0<br>root@ubuntusoekris3:/home/sanctumsoekris3# </span><br><span style="font-family:monospace,monospace"><br>IPERF OUTPUT<br>=============<br>Client-Side<br>-------------</span><br><span style="font-family:monospace,monospace"># iperf3 -c 10.0.0.11<br>Connecting to host 10.0.0.11, port 5201<br>[  4] local 10.0.0.10 port 51633 connected to 10.0.0.11 port 5201<br>[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd<br>[  4]   0.00-1.00   sec  84.8 KBytes   694 Kbits/sec    2   1.41 KBytes       <br>[  4]   1.00-2.00   sec  0.00 Bytes  0.00 bits/sec    1   1.41 KBytes       <br>[  4]   2.00-3.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       <br>[  4]   3.00-4.00   sec  0.00 Bytes  0.00 bits/sec    1   1.41 KBytes       <br>[  4]   4.00-5.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       <br>[  4]   5.00-6.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       <br>[  4]   6.00-7.00   sec  0.00 Bytes  0.00 bits/sec    1   1.41 KBytes       <br>[  4]   7.00-8.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       <br>[  4]   8.00-9.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       <br>[  4]   9.00-10.00  sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       <br>- - - - - - - - - - - - - - - - - - - - - - - - -<br>[ ID] Interval           Transfer     Bandwidth       Retr<br>[  4]   0.00-10.00  sec  84.8 KBytes  69.5 Kbits/sec    5             sender<br>[  4]   0.00-10.00  sec  0.00 Bytes  0.00 bits/sec                  receiver<br><br></span></div><div><span style="font-family:monospace,monospace">Server<br>-------<br># iperf3 -s<br>-----------------------------------------------------------<br>Server listening on 5201<br>-----------------------------------------------------------<br>Accepted connection from 10.0.0.10, port 51632<br>[  5] local 10.0.0.11 port 5201 connected to 10.0.0.10 port 51633<br>[ ID] Interval           Transfer     Bandwidth<br>[  5]   0.00-1.00   sec  0.00 Bytes  0.00 bits/sec                  <br>[  5]   1.00-2.00   sec  0.00 Bytes  0.00 bits/sec                  <br>[  5]   2.00-3.00   sec  0.00 Bytes  0.00 bits/sec                  <br>[  5]   3.00-4.00   sec  0.00 Bytes  0.00 bits/sec                  <br>[  5]   4.00-5.00   sec  0.00 Bytes  0.00 bits/sec                  <br>[  5]   5.00-6.00   sec  0.00 Bytes  0.00 bits/sec                  <br>[  5]   6.00-7.00   sec  0.00 Bytes  0.00 bits/sec                  <br>[  5]   7.00-8.00   sec  0.00 Bytes  0.00 bits/sec                  <br>[  5]   8.00-9.00   sec  0.00 Bytes  0.00 bits/sec                  <br>[  5]   9.00-10.00  sec  0.00 Bytes  0.00 bits/sec                  <br>[  5]  10.00-10.03  sec  0.00 Bytes  0.00 bits/sec                  <br>- - - - - - - - - - - - - - - - - - - - - - - - -<br>[ ID] Interval           Transfer     Bandwidth       Retr<br>[  5]   0.00-10.03  sec  84.8 KBytes  69.3 Kbits/sec    5             sender<br>[  5]   0.00-10.03  sec  0.00 Bytes  0.00 bits/sec                  receiver<br><br></span></div><div><span style="font-family:monospace,monospace"><font face="arial,helvetica,sans-serif">Could you please let me know why this is happening. Am i doing something wrong?<br><br></font></span></div><div><span style="font-family:monospace,monospace"><font face="arial,helvetica,sans-serif">Regards,<br></font></span></div><div><span style="font-family:monospace,monospace"><font face="arial,helvetica,sans-serif">Swathin<br></font></span></div><div><span style="font-family:monospace,monospace"> </span><br></div></div>