<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<br>
<br>
<div class="moz-cite-prefix">On 12/Dec/18 09:01, Andrew Alston
wrote:<br>
<br>
</div>
<blockquote type="cite"
cite="mid:8DB990CF-2BC2-4F51-88A4-535A8F71873E@liquidtelecom.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;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
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:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri",sans-serif;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style>
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt">Mark,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thing is –
you don’t need SRv6 to get rid of v4 – you can use v6 with
SR using standard label stack – the only difference with
SRv6 and SR is that your hops are embedded inside the v6
extension headers rather than using standard label stack for
the same thing. SR without SRv6 is entirely address family
agnostic, hence the question</span></p>
</div>
</blockquote>
<br>
So SRv6 appears to be a complete alternative to (SR)MPLS.<br>
<br>
If you want to get rid of MPLS - and its associated control planes
such as RSVP-TE, LDP, e.t.c - then you can encode the label stack in
the IPv6 EH's since and totally take MPLS out of your network.<br>
<br>
That appears to be the use-case.<br>
<br>
Mark.<br>
</body>
</html>