<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<br>
<br>
<div class="moz-cite-prefix">On 20/Apr/20 16:26,
<a class="moz-txt-link-abbreviated" href="mailto:adamv0025@netconsultings.com">adamv0025@netconsultings.com</a> wrote:<br>
</div>
<blockquote type="cite"
cite="mid:24fa01d6171f$b5916cc0$20b44640$@netconsultings.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="Generator" content="Microsoft Word 15 (filtered
medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Interesting,
so it is an MTU problem after all, I take it there’s no way
to adjust the BPF (Berkeley Packet Filter) limit to let the
6020B sized PSNPs through?</span></p>
</div>
</blockquote>
<br>
Probably could - but I'd prefer solutions that don't mess with the
base system, which ensures long term usability of FRR across future
upgrades.<br>
<br>
The BPF man page has an interesting bug note:<br>
<br>
BUGS<br>
The read buffer must be of a fixed size (returned by the
BIOCGBLEN<br>
ioctl).<br>
<br>
A file that does not request promiscuous mode may receive
promiscuously<br>
received packets as a side effect of another file requesting
this mode on<br>
the same hardware interface. This could be fixed in the kernel
with ad-<br>
ditional processing overhead. However, we favor the model where
all<br>
files must assume that the interface is promiscuous, and if so
desired,<br>
must utilize a filter to reject foreign packets.<br>
<br>
Data link protocols with variable length headers are not
currently sup-<br>
ported.<br>
<br>
Mark.<br>
</body>
</html>