Description:

When using a Plain Ethernet connection (IPoE respectively DHCPoE) access to the network of the upstream router from the internal network might become necessary, e.g. for administration of the upstream router. Albeit without an additional routing entry this isn't possible. 

This article describes how to gain access to the network of an upstream router by setting up an additional routing entry.

Requirements:

• LCOS as of  version 8.50 (download latest version)
• LANtools as of version 8.50 (download latest version)
• LANCOM router with configured and functional internet connection (Plain Ethernet)

Procedure:

1) Open the router configuration in LANconfig and go to the menu IP Router → Routing → IPv4 routing table.

2) Make sure, that the block route for the network of the upstream router is deactivated (Enable state: Off), so that communication  won't be blocked by the router (in this example the block routes for all private address ranges have been deactivated).

3) Add a new entry and change the following parameters:

• IP adress: Enter the network address of the upstream router.
• Netmask: Enter the netmask of the upstream router.
• Router: In the drop-down menu select the internet remote site of the Plain Ethernet connection.
• IP masquerading: Leave the setting on masking Intranet and DMZ (default).

4) The configuration of the routing entry is thereby completed. Write the configuration back into the router.