<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<br>
<div class="moz-cite-prefix">On 12/29/2014 12:56 AM, Dan Kenigsberg
wrote:<br>
</div>
<blockquote cite="mid:20141228235658.GE21690@redhat.com" type="cite">
<pre wrap="">On Fri, Dec 26, 2014 at 12:39:45PM -0600, Blaster wrote:
</pre>
<blockquote type="cite">
<pre wrap="">On 12/23/2014 2:55 AM, Dan Kenigsberg wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Bug 1094842 - Bonding modes 0, 5 and 6 should be avoided for VM networks
<a class="moz-txt-link-freetext" href="https://bugzilla.redhat.com/show_bug.cgi?id=1094842#c0">https://bugzilla.redhat.com/show_bug.cgi?id=1094842#c0</a>
</pre>
</blockquote>
<pre wrap="">
Dan,
What is bad about these modes that oVirt can't use them?
</pre>
</blockquote>
<pre wrap="">
I can only quote jpirko's workds from the link above:
Do not use tlb or alb in bridge, never! It does not work, that's it. The reason
is it mangles source macs in xmit frames and arps. When it is possible, just
use mode 4 (lacp). That should be always possible because all enterprise
switches support that. Generally, for 99% of use cases, you *should* use mode
4. There is no reason to use other modes.
</pre>
</blockquote>
This switch is more of an office switch and only supports part of
the 802.3ad standard:<br>
<blockquote>
<br>
<h4 style="margin: 0px; padding: 0px 0px 5px; border: 0px;
vertical-align: baseline; font-family: Arial, Helvetica,
sans-serif; font-size: 13px; color: rgb(51, 51, 51); font-style:
normal; font-variant: normal; letter-spacing: normal;
line-height: 18.459999084472656px; orphans: auto; text-align:
left; text-indent: 0px; text-transform: none; white-space:
normal; widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px; background: rgb(238, 238, 238);">PowerConnect<strong
style="margin: 0px; padding: 0px; border: 0px; vertical-align:
baseline; font-family: Arial, Helvetica, sans-serif;
font-size: 13px; background: transparent;"><span
class="Apple-converted-space"> </span></strong>2824</h4>
<span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica,
sans-serif; font-size: 13px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing: normal;
line-height: 18.459999084472656px; orphans: auto; text-align:
left; text-indent: 0px; text-transform: none; white-space:
normal; widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px; display: inline !important;
float: none; background-color: rgb(238, 238, 238);">Scalable
from small workgroups to dense access solutions, the 2824 offers
24-port flexibility plus two combo small‑form‑factor pluggable
(SFP) ports for connecting the switch to other networking
equipment located beyond the 100 m distance limitations of
copper cabling.</span><br>
<br>
<span style="color: rgb(0, 0, 0); font-family: Arial, Helvetica,
sans-serif; font-size: 11px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing: normal;
line-height: 18.459999084472656px; orphans: auto; text-align:
left; text-indent: 0px; text-transform: none; white-space:
normal; widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px; display: inline !important;
float: none; background-color: rgb(242, 242, 242);">Industry-standard
link aggregation adhering to IEEE 802.3ad standards (static
support only, LACP not supported)</span></blockquote>
<br>
So the only way to have some kind of bonding without buying more
expensive switches, is using balance-rr (mode=0), balance-xor
(mode=2) or broadcast (modes=3).<br>
<blockquote cite="mid:20141228235658.GE21690@redhat.com" type="cite">
<blockquote type="cite">
<pre wrap="">
I just tested mode 4, and the LACP with Fedora 20 appears to not be
compatible with the LAG mode on my Dell 2824.
Would there be any issues with bringing two NICS into the VM and doing
balance-alb at the guest level?
</pre>
</blockquote>
</blockquote>
Kind regards,<br>
<br>
Jorick Astrego<br>
<BR />
<BR />
<b style="color:#604c78"></b><br><span style="color:#604c78;"><font color="000000"><span style="mso-fareast-language:en-gb;" lang="NL">Met vriendelijke groet, With kind regards,<br><br></span>Jorick Astrego</font></span><b style="color:#604c78"><br><br>Netbulae Virtualization Experts </b><br><hr style="border:none;border-top:1px solid #ccc;"><table style="width: 522px"><tbody><tr><td style="width: 130px;font-size: 10px">Tel: 053 20 30 270</td> <td style="width: 130px;font-size: 10px">info@netbulae.eu</td> <td style="width: 130px;font-size: 10px">Staalsteden 4-3A</td> <td style="width: 130px;font-size: 10px">KvK 08198180</td></tr><tr> <td style="width: 130px;font-size: 10px">Fax: 053 20 30 271</td> <td style="width: 130px;font-size: 10px">www.netbulae.eu</td> <td style="width: 130px;font-size: 10px">7547 TA Enschede</td> <td style="width: 130px;font-size: 10px">BTW NL821234584B01</td></tr></tbody></table><br><hr style="border:none;border-top:1px solid #ccc;"><BR />
</body>
</html>