You have to have one vpdn group configured for terminating pppoe and another for initiate lt2tp.
aaa authentication ppp dsl_auth group radius
aaa authorization network dsl_auth group radius
aaa accounting delay-start
aaa accounting update periodic 60
aaa accounting network dsl_acc start-stop group radius
aaa accounting resource dsl_acc start-stop group radius
vpdn search-order domain
local name testgw
description Local ADSL testing
description Local PPPOE termination
ip unnumbered FastEthernet0/1.10
ppp authentication chap pap dsl_auth
ppp authorization dsl_auth
ppp accounting dsl_acc
I use for instance freeradius based on mysql db and it works well.
For the MTU related question.
As far as I know the most typical minimum MTU is 576 bytes.
If the packet size exceed the minimum MTU of the path it is being fragmented, however if the DF bit set in the header the packet will be dropped. In case of 172 bytes ping shouldn't be a problem. Try do make some icmp debug to see the LAC get the ismp at all.
Anyway on the LAC it is enough to set the MTU to 1492 (pppoe header 8 bytes) and on the LNS you have to use 1452 because of the l2tp overhead (new IP packet+UDP+l2tp=40 bytes).
We are pleased to announce availability of Beta software for 16.6.3.
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looking for early feedback from customers befor...
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