CDRouter’s default configuration for PPPoE/PPP should work for most routers that have a robust implementation. However, if you are unable to establish a PPPoE connection with CDRouter there are a few configuration options you can try:
Some routers will not establish a WAN connection until there is
traffic on the LAN that needs to be forwarded out the WAN. You can
enable CDRouter’s PPPoE Connect-On-Demand test mode by configuring the
pppoeConnectOnDemand testvar to
yes. When this is
enabled, CDRouter will try to send traffic from the LAN to the WAN
when establishing the WAN link.
Verify that your router supports the configured pppAuthType. Some routers do not support CHAP.
If you haven’t configured a PPPoE service name on your router,
try configuring the
pppoeServiceName testvar to ‘any’. Or
if you have configured a specific service name on your router, verify
that the pppoeServiceName testvar is configured with
the same value.
If you are receiving PPP LCP Configure-Nak packets from the PPP peer, you should double check that the router will accept the offered LCP MRU. Some routers will not negotiate a MRU size less than 1500 bytes. You can manually set the MRU size using the pppForceLcpMRU testvar. Please see this Knowledge Base article for more information.