Network Router User Manual

Configuring L2TP Services
C-2
303532-A Rev 00
L2TP session is not active. The LNS failed to negotiate the PPP LCP options.
Reconfigure the host at the remote site dialing in to
the ISP.
For a Bay Networks router at the remote site, check
the PPP MRU/MRRU size. The LNS supports an
MRU/MRUU size of 1500 only.
Use the following guidelines to configure a Bay
Networks router at the remote site:
• For router software versions up to and including
11.02/rel, use an MTU size of 1510, which is the
default.
• For router software versions 11.02/rev and later
set the PPP parameter
RFC1661 Compliance
to
Enable.
You can also check the session statistics, which are
automatically enabled on the LNS.
Bay Networks router at the remote
site cannot tunnel into the
corporate network.
Check the IP address assigned by the RADIUS
server. There may be a mismatch between the
address of the remote router dialing in to the LAC
and the address that the RADIUS server assigns.
For example, router A dials in with its IP address of
1.1.1.3 and the RADIUS server assigns an incorrect
IP address of 1.1.1.5.
Table C-1. Common L2TP Network Problems and Solutions
(continued)
Problem What to Do