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linux_router:network [2025-08-17 Sun wk33 08:20] – [Network - Netplan Setup] baumkplinux_router:network [2025-08-17 Sun wk33 08:23] (current) – [ipv6 Hurricane Electric Setup notes] baumkp
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       gateway6: "2001:470:1f2c:10d::1"       gateway6: "2001:470:1f2c:10d::1"
 </code> </code>
-++++ 
   *''sudo netplan --debug apply'' To apply any changes to the network configuration.   *''sudo netplan --debug apply'' To apply any changes to the network configuration.
   *''sudo netplan --debug generate'' To generate backend specific configuration files.   *''sudo netplan --debug generate'' To generate backend specific configuration files.
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 The use of the stanza "optional: true" on the LAN bridged NICs means during startup the system does not need to wait for these NICs to come up, potentially saving some boot time. The WAN NIC is required, so the optional sanza is not used here. The use of the stanza "optional: true" on the LAN bridged NICs means during startup the system does not need to wait for these NICs to come up, potentially saving some boot time. The WAN NIC is required, so the optional sanza is not used here.
 +++++
 It is important that the network/interfaces method is disable or strange difficult to diagnose network affect may happen. It is important that the network/interfaces method is disable or strange difficult to diagnose network affect may happen.
 Basically ensure that all items in file /etc/network/interfaces are commented out. For example: Basically ensure that all items in file /etc/network/interfaces are commented out. For example:
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 ====ipv6 Hurricane Electric Setup notes==== ====ipv6 Hurricane Electric Setup notes====
 +++++tl;dr;|
 I set up the router network tunnel 6in4 to HEipv6.  I could IPv6 ping WAN from the router, but could not so ping WAN from elsewhere on the local area network (lan).\\ I set up the router network tunnel 6in4 to HEipv6.  I could IPv6 ping WAN from the router, but could not so ping WAN from elsewhere on the local area network (lan).\\
 The main tunnel connection is set up in the main network configuration file(s).\\ The main tunnel connection is set up in the main network configuration file(s).\\
 My routing table had ''2001:470:1f2c:10d::/64 dev he-ipv6 proto kernel metric 256 pref medium'', I found that removing this from the routing table allowed remote lan access to function: The one off command to do this: ''sudo ip r del 2001:470:1f2c:10d::/64 dev he-ipv6''.\\ My routing table had ''2001:470:1f2c:10d::/64 dev he-ipv6 proto kernel metric 256 pref medium'', I found that removing this from the routing table allowed remote lan access to function: The one off command to do this: ''sudo ip r del 2001:470:1f2c:10d::/64 dev he-ipv6''.\\
-I looked for ways to adjust the netplan configuration, either to stop this line from being added, or increase its metric, but to no avail.  So I created the following systemd service to perform this function on start-up after the network was up."\\+I looked for ways to adjust the netplan configuration, either to stop this line from being added, or increase its metric, but to no avail.  So I created the following systemd service to perform this function on start-up after the network was up."\\ ++++
 To create and edit the service: ''sudo systemctl edit --force --full ipv6_start.service'', ''man systemctl'' and search for  To create and edit the service: ''sudo systemctl edit --force --full ipv6_start.service'', ''man systemctl'' and search for 
 ++++ipv6_start.service| ++++ipv6_start.service|