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New Member

Configuration Problems on a 1720 (used as a lns)

We have a 1720 router (12.3) terminating a hanfull (<10) lt2p sessions for a test subdomain for dialup. The problems is that most windows users are unable to browse webpages, view https etc. They also state there connection is also slow.

I have managed a quick fix, by implementing a proxy server for port 80 and https and now they can view these pages and connect with thie i messaging.

We have limited success with drtcp to change the mtu, but this seems the be the best answer so far. I have tried to research the problem and so far have ended up no better then when I started. I know I am missing something but cant put my finger on it.

Is there a way to force all traffic on port 80 etc to go through an external proxy to avoid users having to set a proxy setting in there windows configuration.

On linux if we set the mtu ot 576 we dont have an dramas at all.

This is the current configuration from the router/lns

vpdn enable

vpdn multihop

vpdn aaa attribute nas-port vpdn-nas

vpdn logging

vpdn logging local

vpdn logging tunnel-drop

vpdn history failure table-size 50

vpdn session-limit 100

vpdn ip udp ignore checksum

vpdn search-order domain

vpdn domain-delimiter @ suffix

vpdn domain-delimiter / prefix


vpdn-group CNS-dial


protocol l2tp

virtual-template 1

terminate-from hostname dialport.XXX.XXX

local name L2.dial.XXXXXXXX.XXX

lcp renegotiation on-mismatch

l2tp tunnel password 0 cisco

l2tp tunnel timeout no-session 300

ip mtu adjust

Thanks in advance for you help


Re: Configuration Problems on a 1720 (used as a lns)

What did you change the MTU to ?

New Member

Re: Configuration Problems on a 1720 (used as a lns)


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