diff --git a/draft-ietf-lsvr-l3dl.xml b/draft-ietf-lsvr-l3dl.xml
index 1cbcd97..80a93fc 100644
--- a/draft-ietf-lsvr-l3dl.xml
+++ b/draft-ietf-lsvr-l3dl.xml
@@ -137,7 +137,8 @@
       <t hangText="Clos:">A hierarchic subset of a crossbar switch
       topology commonly used in data centers.</t>
       <t hangText="Datagram:">The L3DL content of a single Layer 2
-      frame.  A full L3DL PDU may be packaged in multiple Datagrams.</t>
+      frame, sans Ethernet framing.  A full L3DL PDU may be packaged in
+      multiple Datagrams.</t>
       <t hangText="Encapsulation:">Address Family Indicator and
       Subsequent Address Family Indicator (AFI/SAFI).  I.e. classes of
       layer 2.5 and 3 addresses such as IPv4, IPv6, MPLS, etc.</t>
@@ -158,8 +159,8 @@
       of the largest packet that can be sent on a medium, see <xref
       target="RFC1122"/> 1.3.3.</t>
       <t hangText="PDU:">Protocol Data Unit, an L3DL application layer
-      message.  A PDU may need to be broken into multiple Datagrams to
-      make it through MTU or other restrictions.</t>
+      message.  A PDU's content may need to be broken into multiple
+      Datagrams to make it through MTU or other restrictions.</t>
       <t hangText="RouterID:">An 32-bit identifier unique in the
       current routing domain, see <xref target="RFC6286"/>.</t>
       <t hangText="Session:">An established, via OPEN PDUs, session
@@ -403,11 +404,13 @@
  0                   1                   2                   3  
  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-|   Version   |L|                Datagram Number                |
+|   Version   |L|  Transmission Sequence Number |               |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-|        Datagram Length        |            Checksum           ~
+|        Datagram Number        |        Datagram Length        |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-~                               |           Payload...          ~
+|                            Checksum                           |
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+|                           Payload...                          |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
         </artwork>
       </figure>
@@ -428,7 +431,7 @@
 
       <t hangText="Transmission Sequence Number:">A 16-bit strictly
       increasing unsigned integer identifying this PDU, possibly across
-      retransmissions, that wraps from 2^24-1 to 0.  The initial value
+      retransmissions, that wraps from 2^16-1 to 0.  The initial value
       is arbitrary.  See <xref target="RFC1982"/> on DNS Serial Number
       Arithmetic for too much detail on comparison and incrementing a
       wrapping sequence number.</t>
@@ -443,9 +446,11 @@
       a datagram to 2^16 octets.</t>
 
       <t hangText="Checksum:">A 32 bit hash over the Datagram to detect
-      bit flips, see <xref target="checksum"/>.  If a Datagram fails a
-      checksum verification, the entire PDU is invalid and should be
-      silently discarded.</t>
+      bit flips, see <xref target="checksum"/>.</t>
+
+      <t>If a Datagram fails checksum verification, the datagram is
+      invalid and should be silently discarded.  The sender will
+      retransmit the PDU, and the receiver can assmble it.</t>
 
       <t hangText="Payload:">The PDU being transported or a fragment
       thereof.</t>