.PP
\fB+[no]sit\fR\fB[=####]\fR
.RS 4
-Send a Source Identity Token EDNS option, with optional value\&. Replaying a SIT from a previous response will allow the server to identify a previous client\&. The default is
-\fB+nosit\fR\&. Currently using experimental value 65001 for the option code\&.
+Send a DNS COOKIE option, with optional value\&. Replaying a DNS COOKIE from a previous response will allow the server to identify a previous client\&. The default is
+\fB+nosit\fR\&.
+.sp
+This option is
+\fB+[no]cookie\fR
+from BIND 9\&.11\&.0 onwards\&. BIND 9\&.10\&.0 through BIND 9\&.10\&.2 sent the experimental option code 65001\&. This was changed to 10 in BIND 9\&.10\&.3 when the DNS COOKIE option was allocated\&.
.RE
.PP
\fB+split=W\fR
<dt><span class="term"><code class="option">+[no]sit[<span class="optional">=####</span>]</code></span></dt>
<dd>
<p>
- Send a Source Identity Token EDNS option, with optional
- value. Replaying a SIT from a previous response will
+ Send a DNS COOKIE option, with optional value.
+ Replaying a DNS COOKIE from a previous response will
allow the server to identify a previous client. The
- default is <code class="option">+nosit</code>. Currently using
- experimental value 65001 for the option code.
+ default is <code class="option">+nosit</code>.
+ </p>
+ <p>
+ This option is <code class="option">+[no]cookie</code> from
+ BIND 9.11.0 onwards. BIND 9.10.0 through BIND 9.10.2
+ sent the experimental option code 65001. This was
+ changed to 10 in BIND 9.10.3 when the DNS COOKIE
+ option was allocated.
</p>
</dd>
<dt><span class="term"><code class="option">+split=W</code></span></dt>
<dt><span class="term"><code class="option">+[no]sit[<span class="optional">=####</span>]</code></span></dt>
<dd>
<p>
- Send a Source Identity Token EDNS option, with optional
- value. Replaying a SIT from a previous response will
+ Send a DNS COOKIE option, with optional value.
+ Replaying a DNS COOKIE from a previous response will
allow the server to identify a previous client. The
- default is <code class="option">+nosit</code>. Currently using
- experimental value 65001 for the option code.
+ default is <code class="option">+nosit</code>.
+ </p>
+ <p>
+ This option is <code class="option">+[no]cookie</code> from
+ BIND 9.11.0 onwards. BIND 9.10.0 through BIND 9.10.2
+ sent the experimental option code 65001. This was
+ changed to 10 in BIND 9.10.3 when the DNS COOKIE
+ option was allocated.
</p>
</dd>
<dt><span class="term"><code class="option">+split=W</code></span></dt>