netplug: T7360: DHCPv6 address is not cleared when interface goes oper-down

When an interface goes down - e.g. cable unplugged - the DHCPv6 assigned IPv6
address is not removed from said interface. We should provide the same behavior
as with IPv4. IPv6 address should be removed and dhcpv6 client restarted once
the interface goes operational up again.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/etc/netplug/vyos-netplug-dhcp-client b/src/etc/netplug/vyos-netplug-dhcp-client
index 42ae5df1d..a230fe900 100755
--- a/src/etc/netplug/vyos-netplug-dhcp-client
+++ b/src/etc/netplug/vyos-netplug-dhcp-client
@@ -48,10 +48,13 @@ config = Config()
 interface_path = ['interfaces'] + Section.get_config_path(interface).split()
 
 systemdV4_service = f'dhclient@{interface}.service'
+systemdV6_service = f'dhcp6c@{interface}.service'
 if in_out == 'out':
     # Interface moved state to down
     if is_systemd_service_active(systemdV4_service):
         cmd(f'systemctl stop {systemdV4_service}')
+    if is_systemd_service_active(systemdV6_service):
+        cmd(f'systemctl stop {systemdV6_service}')
 elif in_out == 'in':
     if config.exists_effective(interface_path + ['address']):
         tmp = config.return_effective_values(interface_path + ['address'])
@@ -64,3 +67,5 @@ elif in_out == 'in':
         # we will re-start the service and thus cancel the backoff time.
         if 'dhcp' in tmp:
             cmd(f'systemctl restart {systemdV4_service}')
+        if 'dhcpv6' in tmp:
+            cmd(f'systemctl restart {systemdV6_service}')