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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I haven’t done this on a VXLAN deployment but I did a packet capture on a Grizzly GRE environment to see exactly what it looks like on the wire and the results
are below (although the color coding will probably be lost.) What we have with GRE is 802.1q inside the encapsulated payload so if the 4096 limit is a concern then this doesn’t alleviate it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">What I’m not sure of is whether the VLAN ID inside of the GRE payload is globally unique or whether different compute nodes can reuse the same VLAN ID for different
Neutron networks.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If somebody has a VXLAN environment up and running I would love to see a packet capture similar to the one below (hint, hint :-))<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><strong><span style="font-size:10.5pt;font-family:"Courier New"">Frame 1: 136 bytes on wire (1088 bits), 136 bytes captured (1088 bits)</span></strong><b><span style="font-family:"Courier New""><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Ethernet II</span></strong><strong><span style="font-family:"Courier New"">, Src: e8:9a:8f:23:41:8f (e8:9a:8f:23:41:8f), Dst: e8:9a:8f:23:42:8d (e8:9a:8f:23:42:8d)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Internet Protocol Version 4</span></strong><strong><span style="font-family:"Courier New"">, Src:
<span style="background:orange">192.168.160.13</span> (192.168.160.13), Dst: <span style="background:orange">
192.168.160.21</span> (192.168.160.21)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Generic Routing Encapsulation</span></strong><strong><span style="font-family:"Courier New""> (Transparent Ethernet bridging)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Ethernet II</span></strong><strong><span style="font-family:"Courier New"">, Src: fa:16:3e:69:42:0d (fa:16:3e:69:42:0d), Dst: fa:16:3e:0c:bc:fa (fa:16:3e:0c:bc:fa)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">802.1Q Virtual LAN</span></strong><strong><span style="font-family:"Courier New"">, PRI: 0, CFI: 0,
<span style="background:aqua">ID: 1</span></span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Internet Protocol Version 4</span></strong><strong><span style="font-family:"Courier New"">, Src:
<span style="background:lime">192.168.20.3</span> (192.168.20.3), Dst: <span style="background:lime">
12.129.192.149</span> (12.129.192.149)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">User Datagram Protocol</span></strong><strong><span style="font-family:"Courier New"">, Src Port: 123 (123), Dst Port: 123 (123)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Network Time Protocol</span></strong><strong><span style="font-family:"Courier New""> (NTP Version 4, client)</span></strong><br>
<br>
</span></b><strong><span style="font-size:10.5pt;font-family:"Courier New"">Frame 2: 88 bytes on wire (704 bits), 88 bytes captured (704 bits)</span></strong><b><span style="font-family:"Courier New""><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Ethernet II</span></strong><strong><span style="font-family:"Courier New"">, Src: e8:9a:8f:23:41:8f (e8:9a:8f:23:41:8f), Dst: e8:9a:8f:23:41:f1 (e8:9a:8f:23:41:f1)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Internet Protocol Version 4</span></strong><strong><span style="font-family:"Courier New"">, Src:
<span style="background:orange">192.168.160.13</span> (192.168.160.13), Dst: <span style="background:orange">
192.168.160.14</span> (192.168.160.14)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Generic Routing Encapsulation</span></strong><strong><span style="font-family:"Courier New""> (Transparent Ethernet bridging)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Ethernet II</span></strong><strong><span style="font-family:"Courier New"">, Src: fa:16:3e:35:e3:4f (fa:16:3e:35:e3:4f), Dst: Broadcast (ff:ff:ff:ff:ff:ff)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">802.1Q Virtual LAN</span></strong><strong><span style="font-family:"Courier New"">, PRI: 0, CFI: 0,
<span style="background:aqua">ID: 1</span></span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Address Resolution Protocol</span></strong><strong><span style="font-family:"Courier New""> (request)</span></strong><br>
<br>
</span></b><strong><span style="font-size:10.5pt;font-family:"Courier New"">Frame 3: 88 bytes on wire (704 bits), 88 bytes captured (704 bits)</span></strong><b><span style="font-family:"Courier New""><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Ethernet II</span></strong><strong><span style="font-family:"Courier New"">, Src: e8:9a:8f:23:41:8f (e8:9a:8f:23:41:8f), Dst: e8:9a:8f:23:42:8d (e8:9a:8f:23:42:8d)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Internet Protocol Version 4</span></strong><strong><span style="font-family:"Courier New"">, Src:
<span style="background:orange">192.168.160.13</span> (192.168.160.13), Dst: <span style="background:orange">
192.168.160.21</span> (192.168.160.21)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Generic Routing Encapsulation</span></strong><strong><span style="font-family:"Courier New""> (Transparent Ethernet bridging)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Ethernet II</span></strong><strong><span style="font-family:"Courier New"">, Src: fa:16:3e:35:e3:4f (fa:16:3e:35:e3:4f), Dst: Broadcast (ff:ff:ff:ff:ff:ff)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">802.1Q Virtual LAN</span></strong><strong><span style="font-family:"Courier New"">, PRI: 0, CFI: 0,
<span style="background:aqua">ID: 1</span></span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Address Resolution Protocol</span></strong><strong><span style="font-family:"Courier New""> (request)</span></strong><br>
<br>
</span></b><strong><span style="font-size:10.5pt;font-family:"Courier New"">Frame 4: 88 bytes on wire (704 bits), 88 bytes captured (704 bits)</span></strong><b><span style="font-family:"Courier New""><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Ethernet II</span></strong><strong><span style="font-family:"Courier New"">, Src: e8:9a:8f:23:42:8d (e8:9a:8f:23:42:8d), Dst: e8:9a:8f:23:41:8f (e8:9a:8f:23:41:8f)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Internet Protocol Version 4</span></strong><strong><span style="font-family:"Courier New"">, Src:
<span style="background:orange">192.168.160.21</span> (192.168.160.21), Dst: <span style="background:orange">
192.168.160.13</span> (192.168.160.13)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Generic Routing Encapsulation</span></strong><strong><span style="font-family:"Courier New""> (Transparent Ethernet bridging)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Ethernet II</span></strong><strong><span style="font-family:"Courier New"">, Src: fa:16:3e:b5:19:db (fa:16:3e:b5:19:db), Dst: fa:16:3e:35:e3:4f (fa:16:3e:35:e3:4f)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">802.1Q Virtual LAN</span></strong><strong><span style="font-family:"Courier New"">, PRI: 0, CFI: 0,
<span style="background:aqua">ID: 5</span></span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Address Resolution Protocol</span></strong><strong><span style="font-family:"Courier New""> (reply)</span></strong><br>
<br>
</span></b><strong><span style="font-size:10.5pt;font-family:"Courier New"">Frame 5: 388 bytes on wire (3104 bits), 388 bytes captured (3104 bits)</span></strong><b><span style="font-family:"Courier New""><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Ethernet II</span></strong><strong><span style="font-family:"Courier New"">, Src: e8:9a:8f:23:41:8f (e8:9a:8f:23:41:8f), Dst: e8:9a:8f:23:42:8d (e8:9a:8f:23:42:8d)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Internet Protocol Version 4</span></strong><strong><span style="font-family:"Courier New"">, Src:
<span style="background:orange">192.168.160.13</span> (192.168.160.13), Dst: <span style="background:orange">
192.168.160.21</span> (192.168.160.21)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Generic Routing Encapsulation</span></strong><strong><span style="font-family:"Courier New""> (Transparent Ethernet bridging)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Ethernet II</span></strong><strong><span style="font-family:"Courier New"">, Src: fa:16:3e:35:e3:4f (fa:16:3e:35:e3:4f), Dst: fa:16:3e:b5:19:db (fa:16:3e:b5:19:db)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">802.1Q Virtual LAN</span></strong><strong><span style="font-family:"Courier New"">, PRI: 0, CFI: 0,
<span style="background:aqua">ID: 1</span></span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Internet Protocol Version 4</span></strong><strong><span style="font-family:"Courier New"">, Src:
<span style="background:lime">192.168.20.10</span> (192.168.20.10), Dst: <span style="background:lime">
192.168.20.2</span> (192.168.20.2)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">User Datagram Protocol</span></strong><strong><span style="font-family:"Courier New"">, Src Port: 68 (68), Dst Port: 67 (67)</span></strong><br>
<strong><span style="font-family:"Courier New";color:goldenrod">Bootstrap Protocol</span></strong><strong><span style="font-family:"Courier New""> (Request)</span></strong></span></b><br>
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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