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<div style="font-family:sans-serif"><div style="white-space:normal"><p dir="auto">Hi Adrian,</p>
<p dir="auto">maybe I am late to the party, but seems your configuration works.</p>
<p dir="auto">1510 + IP + ICMP => 1538 bytes<br>
1511 + IP + ICMP + 3 bytes padding => 1542 (wont work)</p>
<p dir="auto">Regards<br>
Jörg</p>
<p dir="auto">On 28 Feb 2017, at 12:50, Adrian Luchian wrote:</p>
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<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>Hi,
</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>We need to setup an L2 connection with MTU=1540 for a customer. After changing default-max-frame-size to 2000 and issue reload, we still can’t get replies to icmp with size
> 1500 bytes and df-bit set.</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>1510 Byte, DF not set = OK<br>
=================================<br>
</span><span style='font-size:9.0pt;font-family:"Courier New"'>hostname#ping x.x.x.x size 1510<br>
Type escape sequence to abort.<br>
Sending 5, 1510-byte ICMP Echos to x.x.x.x, timeout is 2 seconds:<br>
!!!!!<br>
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/7/8 ms<br>
</span><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'><br>
<br>
<br>
1511 Byte DF not set = not OK<br>
=================================<br>
</span><span style='font-size:9.0pt;font-family:"Courier New"'>hostname#ping x.x.x.x size 1511<br>
Type escape sequence to abort.<br>
Sending 5, 1511-byte ICMP Echos to x.x.x.x, timeout is 2 seconds:<br>
.....<br>
Success rate is 0 percent (0/5)<br>
</span><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'><br>
1500 Byte, DF set = OK<br>
=================================<br>
</span><span style='font-size:9.0pt;font-family:"Courier New"'>hostname#ping x.x.x.x size 1500 df-bit<br>
Type escape sequence to abort.<br>
Sending 5, 1500-byte ICMP Echos to x.x.x.x, timeout is 2 seconds:<br>
Packet sent with the DF bit set<br>
!!!!!<br>
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/6/8 ms<br>
<br>
</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'><br>
1501 Byte, DF set = not OK<br>
=================================<br>
</span><span style='font-size:9.0pt;font-family:"Courier New"'>hostname#ping x.x.x.x size 1501 df-bit<br>
Type escape sequence to abort.<br>
Sending 5, 1501-byte ICMP Echos to x.x.x.x, timeout is 2 seconds:<br>
Packet sent with the DF bit set<br>
.....<br>
Success rate is 0 percent (0/5)<br>
</span><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'><br>
</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>#show max-frame-size</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>Default max frame size for ETH : 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>Default max frame size for POS : 4474</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>Slot 1 Port 1 Port 2 Port 3 Port 4</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 5 Port 6 Port 7 Port 8</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 9 Port 10 Port 11 Port 12</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 13 Port 14 Port 15 Port 16</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 17 Port 18 Port 19 Port 20</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>Slot 2 Port 1 Port 2 Port 3 Port 4</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 5 Port 6 Port 7 Port 8</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 9 Port 10 Port 11 Port 12</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 13 Port 14 Port 15 Port 16</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 17 Port 18 Port 19 Port 20</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>Slot 3 Port 1 Port 2 Port 3 Port 4</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>Slot 4 Port 1 Port 2 Port 3 Port 4</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 5 Port 6 Port 7 Port 8</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 9 Port 10 Port 11 Port 12</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 13 Port 14 Port 15 Port 16</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> Port 17 Port 18 Port 19 Port 20</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> -------- -------- -------- --------</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> 2000 2000 2000 2000</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>Is there anything else to be changed to accomplish this?</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>Best regards,</span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'> </span></p>
<p style='font-family:"Calibri", sans-serif; font-size:11pt; margin:0; margin-bottom:0.0001pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>Adrian Luchian</span></p>
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