<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
</head>
<body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; ">
<div>
<div>Sub-interfaces only really apply to router type devices. They refer to logical ports (i.e. VLANS) arriving on a single physical port.</div>
<div><br>
</div>
<div>VLAN configuration in the traditional sense usually applies more to switches, where you're assigning certain ports to VLANs and setting them as trunks or access ports .etc</div>
<div><br>
</div>
<div>So to answer your question, they're almost the same thing — It just depends in which context you're referring to them. Don't get confused by the terminology :)</div>
<div><br>
</div>
<div>
<div>Kind Regards,</div>
<div>
<div><br>
</div>
<div><b>Josh Farrelly</b></div>
<div><i>Infrastructure Architect, ICTS.</i></div>
<div>Manukau Institute of Technology</div>
</div>
</div>
</div>
<div><br>
</div>
<span id="OLK_SRC_BODY_SECTION">
<div style="font-family:Calibri; font-size:11pt; text-align:left; color:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style="font-weight:bold">From: </span>Eric A Louie <<a href="mailto:elouie@yahoo.com">elouie@yahoo.com</a>><br>
<span style="font-weight:bold">Date: </span>Friday, 5 October 2012 12:47 PM<br>
<span style="font-weight:bold">To: </span>Josh Farrelly <<a href="mailto:Josh.Farrelly@manukau.ac.nz">Josh.Farrelly@manukau.ac.nz</a>>, "<a href="mailto:foundry-nsp@puck.nether.net">foundry-nsp@puck.nether.net</a>" <<a href="mailto:foundry-nsp@puck.nether.net">foundry-nsp@puck.nether.net</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [f-nsp] Tagged interfaces<br>
</div>
<div><br>
</div>
<div><style type="text/css"><!-- DIV {margin:0px;} --></style>
<div>
<div style="font-family:arial, helvetica, sans-serif;font-size:10pt">
<div></div>
<div>Josh, that's a great document, thank you.</div>
<div> </div>
<div>I'm going to do the testing in the lab, but are there any functional advantages to using VLAN configurations versus sub-interface configuration on the Cisco device when converting from the Foundry Ethernet multiple IP address configuration?<br>
</div>
Much appreciated,<br>
Eric Louie<br>
619-743-5375
<div><br>
</div>
<div style="FONT-FAMILY: arial, helvetica, sans-serif; FONT-SIZE: 10pt"><br>
<div style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 12pt">
<font size="2" face="Tahoma">
<hr size="1">
<b><span style="FONT-WEIGHT: bold">From:</span></b> Josh Farrelly <<a href="mailto:Josh.Farrelly@manukau.ac.nz">Josh.Farrelly@manukau.ac.nz</a>><br>
<b><span style="FONT-WEIGHT: bold">To:</span></b> Eric A Louie <<a href="mailto:elouie@yahoo.com">elouie@yahoo.com</a>>; "<a href="mailto:foundry-nsp@puck.nether.net">foundry-nsp@puck.nether.net</a>" <<a href="mailto:foundry-nsp@puck.nether.net">foundry-nsp@puck.nether.net</a>><br>
<b><span style="FONT-WEIGHT: bold">Sent:</span></b> Thu, October 4, 2012 3:30:11 PM<br>
<b><span style="FONT-WEIGHT: bold">Subject:</span></b> Re: [f-nsp] Tagged interfaces<br>
</font><br>
<div>
<div>Hi Eric</div>
<div><br>
</div>
<div>For the most part, yes to both.</div>
<div><br>
</div>
<div>Take a look at this document here (pages 19 & 20): <a href="http://community.brocade.com/servlet/JiveServlet/previewBody/1848-102-1-3553/Brocade-Cisco%20Comparison.pdf">http://community.brocade.com/servlet/JiveServlet/previewBody/1848-102-1-3553/Brocade-Cisco%20Comparison.pdf</a></div>
<div><br>
</div>
<div>
<div>Kind Regards,</div>
<div>
<div><br>
</div>
<div><b>Josh Farrelly</b></div>
<div><i>Infrastructure Architect, ICTS.</i></div>
<div>Manukau Institute of Technology</div>
</div>
</div>
</div>
<div><br>
</div>
<span id="OLK_SRC_BODY_SECTION">
<div style="BORDER-BOTTOM: medium none; TEXT-ALIGN: left; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; FONT-FAMILY: Calibri; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style="FONT-WEIGHT: bold">From: </span>Eric A Louie <<a href="mailto:elouie@yahoo.com" rel="nofollow" target="_blank" ymailto="mailto:elouie@yahoo.com">elouie@yahoo.com</a>><br>
<span style="FONT-WEIGHT: bold">Date: </span>Friday, 5 October 2012 11:07 AM<br>
<span style="FONT-WEIGHT: bold">To: </span>"<a href="mailto:foundry-nsp@puck.nether.net" rel="nofollow" target="_blank" ymailto="mailto:foundry-nsp@puck.nether.net">foundry-nsp@puck.nether.net</a>" <<a href="mailto:foundry-nsp@puck.nether.net" rel="nofollow" target="_blank" ymailto="mailto:foundry-nsp@puck.nether.net">foundry-nsp@puck.nether.net</a>><br>
<span style="FONT-WEIGHT: bold">Subject: </span>[f-nsp] Tagged interfaces<br>
</div>
<div><br>
</div>
<div>
<div>
<div style="FONT-FAMILY: arial, helvetica, sans-serif; COLOR: #ff0000; FONT-SIZE: 10pt">
<div></div>
<div><font color="#000000">I'm preparing to translate some Foundry configurations to Cisco.</font></div>
<p><font color="#000000"></font> </p>
<p><font color="#000000">As far as I can tell, the tagged interfaces are really just 802.1q trunk ports. Is that an accurate assessment?</font></p>
<p><font color="#000000"></font> </p>
<p><font color="#000000">Foundry allows multiple IP addresses on the Ethernet interface. Do I have a choice to use vlan interfaces and/or Ethernet sub-interfaces on the Cisco to provide the same functionality?</font></p>
<div><br>
</div>
Much appreciated,<br>
Eric Louie<br>
<div> </div>
</div>
</div>
</div>
</span></div>
</div>
</div>
</div>
</div>
</span>
</body>
</html>