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<p class="MsoPlainText">tcpdump -i ens160 'tcp port 179 and host 192.168.199.13'<o:p></o:p></p>
<p class="MsoPlainText">tcpdump: verbose output suppressed, use -v or -vv for full protocol decode<o:p></o:p></p>
<p class="MsoPlainText">listening on ens160, link-type EN10MB (Ethernet), capture size 65535 bytes<o:p></o:p></p>
<p class="MsoPlainText">11:52:14.026373 IP <span style="color:red">bird1.cuhk.edu.hk.54372
</span>> 192.168.199.13.bgp: Flags [S], seq 256428900, win 29200, options [mss 1460,sackOK,TS val 2230497637 ecr 0,nop,wscale 7], length 0<o:p></o:p></p>
<p class="MsoPlainText">11:52:14.401556 IP 192.168.199.13.51631 > <span style="color:red">
bird1.cuhk.edu.hk.bgp</span>: Flags [S], seq 3989668659, win 29200, options [mss 1460,sackOK,TS val 2230734469 ecr 0,nop,wscale 7], length 0<o:p></o:p></p>
<p class="MsoPlainText">11:52:18.031631 IP bird1.cuhk.edu.hk.58460 > 192.168.199.13.bgp: Flags [S], seq 3350460062, win 29200, options [mss 1460,sackOK,TS val 2230501642 ecr 0,nop,wscale 7], length 0<o:p></o:p></p>
<p class="MsoPlainText">11:52:19.405962 IP 192.168.199.13.54429 > bird1.cuhk.edu.hk.bgp: Flags [S], seq 573528156, win 29200, options [mss 1460,sackOK,TS val 2230739473 ecr 0,nop,wscale 7], length 0<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">tcpdump -i ens160 'tcp port 179 and host 192.168.199.12'<o:p></o:p></p>
<p class="MsoPlainText">tcpdump: verbose output suppressed, use -v or -vv for full protocol decode<o:p></o:p></p>
<p class="MsoPlainText">listening on ens160, link-type EN10MB (Ethernet), capture size 65535 bytes<o:p></o:p></p>
<p class="MsoPlainText">11:52:03.595665 IP 192.168.199.12.53662 > bird2.cuhk.edu.hk.bgp: Flags [S], seq 708312977, win 29200, options [mss 1460,sackOK,TS val 2230487710 ecr 0,nop,wscale 7], length 0<o:p></o:p></p>
<p class="MsoPlainText">11:52:03.884791 IP bird2.cuhk.edu.hk.39590 > 192.168.199.12.bgp: Flags [S], seq 2978908357, win 29200, options [mss 1460,sackOK,TS val 2230724456 ecr 0,nop,wscale 7], length 0<o:p></o:p></p>
<p class="MsoPlainText">11:52:07.600739 IP 192.168.199.12.54354 > bird2.cuhk.edu.hk.bgp: Flags [S], seq 562475138, win 29200, options [mss 1460,sackOK,TS val 2230491715 ecr 0,nop,wscale 7], length 0<o:p></o:p></p>
<p class="MsoPlainText">11:52:07.889979 IP bird2.cuhk.edu.hk.59598 > 192.168.199.12.bgp: Flags [S], seq 2985453764, win 29200, options [mss 1460,sackOK,TS val 2230728462 ecr 0,nop,wscale 7], length 0<o:p></o:p></p>
<p class="MsoPlainText"><span style="mso-fareast-language:ZH-CN"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="mso-fareast-language:ZH-CN">Seems the problem is domain name?<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="mso-fareast-language:ZH-CN"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="mso-fareast-language:ZH-CN">-----Original Message-----<br>
From: Bird-users <bird-users-bounces@network.cz> On Behalf Of Rae Ho (ITSC)<br>
Sent: Wednesday, June 6, 2018 11:13 AM<br>
To: Ondrej Zajicek <santiago@crfreenet.org><br>
Cc: bird-users@network.cz<br>
Subject: RE: BIRD router/route server functions</span></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Last error: Socket: No route to host <-- <o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">-----Original Message-----<o:p></o:p></p>
<p class="MsoPlainText">From: Ondrej Zajicek <<a href="mailto:santiago@crfreenet.org"><span style="color:windowtext;text-decoration:none">santiago@crfreenet.org</span></a>>
<o:p></o:p></p>
<p class="MsoPlainText">Sent: Tuesday, June 5, 2018 8:57 PM<o:p></o:p></p>
<p class="MsoPlainText">To: Rae Ho (ITSC) <<a href="mailto:raeho@cuhk.edu.hk"><span style="color:windowtext;text-decoration:none">raeho@cuhk.edu.hk</span></a>><o:p></o:p></p>
<p class="MsoPlainText">Cc: Quan Zhou <<a href="mailto:quanzhou822@gmail.com"><span style="color:windowtext;text-decoration:none">quanzhou822@gmail.com</span></a>>;
<a href="mailto:bird-users@network.cz"><span style="color:windowtext;text-decoration:none">bird-users@network.cz</span></a><o:p></o:p></p>
<p class="MsoPlainText">Subject: Re: BIRD router/route server functions<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">On Tue, Jun 05, 2018 at 09:29:08AM +0000, Rae Ho (ITSC) wrote:<o:p></o:p></p>
<p class="MsoPlainText">> Dear Quan Zhou, Thanks. Rae<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Hi<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Your setup looks OK. You could use tcpdump on ens160 to see if there are BGP connection attempts in both directions. Also, is there anything interesting in BIRD logs?<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">You should also upgrade BIRD, version 1.4.5 is too old.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">--<o:p></o:p></p>
<p class="MsoPlainText">Elen sila lumenn' omentielvo<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Ondrej 'Santiago' Zajicek (email: <a href="mailto:santiago@crfreenet.org">
<span style="color:windowtext;text-decoration:none">santiago@crfreenet.org</span></a>) OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) "To err is human -- to blame it on a computer is even more so."<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
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