Differences

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--- userdoc:tt-dhcpv6-prefix-delegation [2017/05/11 16:27]
abelbeck [DHCPv6 Client Action Script]
+++ userdoc:tt-dhcpv6-prefix-delegation [2017/06/07 10:19]
abelbeck [DHCPv6 Client Action Script]
@@ Line 27: / Line 27: @@
 Internal Interfaces: -> Interface: -> IPv6 Autoconfig:\\
+!!Version ->!! AstLinux 1.2.5 to AstLinux 1.2.10 - ''IPv6/nn'' must be empty\\
 {{:userdoc:dhcpv6-internal-interface.jpg?nolink|DHCPv6 Internal Interface}}
-!!Tip ->!! Any associated static IPv6/nn: entry will be ignored if Prefix Delegation is enabled, best practice to leave empty for this case.
+!!Version ->!! AstLinux 1.3.0 and later - ''IPv6/nn'' may define a ULA/64 address, or be empty\\
+{{:userdoc:ipv6-ula-nptv6-assign-gua.jpg?nolink|DHCPv6 Internal Interface}}
 !!Note ->!! A "Reboot System" is required to apply any changes related to DHCPv6.
 ===== DHCPv6 Client Action Script =====
 !!Note: AstLinux 1.2.10 or later is required!!
+!!Note: AstLinux 1.3.0 or later!! executes a default action, additional custom actions can enabled if a custom script is defined.
 If an executable script exists at ''/mnt/kd/dhcp6c.script'' the dhcp6c daemon will call the script after a DHCPv6 request is processed.
@@ Line 65: / Line 68: @@
 !!Note ->!! Do not expect all the variables to be always defined, though if ''dhcp6c_prefix'' is defined then the complete set will be defined.
-As an example, a simple script to log when the DHCPv6 lease is updated and whether it changed:
+Lastly, an indication whether the DHCPv6 update was different from the previous update:
+  dhcp6c_changed
+The ''dhcp6c_changed'' variable can be empty if there was no previous ''dhcp6c_cache'' file to compare, ''"yes"'' if different from previous, and ''"no"'' if the same as previous.  The most common use case would be to compare ''dhcp6c_changed'' with ''"no"'' to skip operations that have been previously performed.
+As an example, a simple script to log when the DHCPv6 lease is updated and whether it changed:\\
+!!Note ->!! Occurs by default with AstLinux 1.3.0 or later
   #!/bin/bash
   if [ -n "$dhcp6c_prefix" ]; then
-    logger -t dhcp6c -p kern.info "Updated with Prefix: $dhcp6c_prefix${dhcp6c_changed:+ changed=$dhcp6c_changed}"
+    case "$dhcp6c_changed" in
+      yes) changed=" (changed)" ;;
+       no) changed=" (no change)" ;;
+        *) changed="" ;;
+    esac
+    logger -t dhcp6c -p kern.info "IPv6 Prefix$changed: $dhcp6c_prefix"
   fi
 ===== Debugging DHCPv6 =====