From b12fac6f5f1eddb6be2dbf099a69040ca654e6c1 Mon Sep 17 00:00:00 2001
From: Randy Bush <randy@psg.com>
Date: Wed, 10 Feb 2021 17:09:26 -0800
Subject: [PATCH] at least one provider

---
 draft-ietf-sidrops-8210bis.xml | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/draft-ietf-sidrops-8210bis.xml b/draft-ietf-sidrops-8210bis.xml
index c8ab003..7425ebb 100644
--- a/draft-ietf-sidrops-8210bis.xml
+++ b/draft-ietf-sidrops-8210bis.xml
@@ -962,14 +962,14 @@
 |                                           |
 +-------------------------------------------+
 |                                           |
-|   Provider Autonomous System Number(s)    |
+|    Provider Autonomous System Numbers     |
 |                                           |
 ~-------------------------------------------~
           </artwork>
         </figure>
 	<t>The ASPA PDU is to support <xref
 	target="I-D.ietf-sidrops-aspa-profile"/>.  An ASPA PDU
-	represents one single customer AS and zero or more provider ASs
+	represents one single customer AS and one or more provider ASs
 	for a particular Address Family.  Receipt of an ASPA PDU
 	announcement when the router already has an ASPA PDU with the
 	same Customer Autonomous System Number and the same Address
@@ -995,23 +995,25 @@
      2-7    Reserved, must be zero
        </artwork>
     </figure>
-        <t>The Provider AS Count is the number of Provider Autonomous
-        System Number(s) at the end of the PDU, and may be zero or more.
+        <t>
+          The Provider AS Count is the number of Provider Autonomous
+          System Number(s) at the end of the PDU, and MUST be one or
+          more.
 	</t>
 	<t>
-          The Customer Autonomous System Number is the 32-bit
-          Autonomous System Number of the customer which signed the
-          PDU.  There may be only one ASPA for a Customer Autonomous
-	  System Number active at any time.
+          The Customer Autonomous System Number is the 32-bit Autonomous
+          System Number of the customer which signed the PDU.  There
+          MUST be one and only one ASPA for a Customer Autonomous System
+          Number active in the router at any time.
         </t>
         <t>
           The Provider AS Count is the number of 32-bit Provider
-          Autonomous System Numbers in the PDU.  There may be none.
+          Autonomous System Numbers in the PDU.  It MUST be one or
+          greater.
         </t>
         <t>
-          There are zero or more 32-bit Provider Autonomous System
-          Number fields; see <xref
-          target="I-D.ietf-sidrops-aspa-profile"/>.
+          There are one or more 32-bit Provider Autonomous System Number
+          fields; see <xref target="I-D.ietf-sidrops-aspa-profile"/>.
         </t>
       </section>