1 files changed, 4 insertions, 0 deletions
diff --git a/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h b/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h
index 71b16b19..e3e75531 100644
--- a/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h
+++ b/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h
@@ -249,6 +249,10 @@ struct _DHCP6_INSTANCE {
   volatile EFI_STATUS           UdpSts;
   BOOLEAN                       InDestroy;
   BOOLEAN                       MediaPresent;
+  //
+  // StartTime is used to calculate the 'elapsed-time' option. Refer to RFC3315,
+  // the elapsed-time is amount of time since the client began its current DHCP transaction. 
+  //
   UINT64                        StartTime;
 };