PPPoE server supports setting the MPPE preferences, it is implemented as node with leafnodes for require, prefer and deny. This will render a wrong Accel configuration as it will be "None" if specified.
```
+pppoe-server {
+ ppp-options {
+ mppe {
+ deny
+ require
+ }
+ }
+}
```
it must be:
```
+pppoe-server {
+ ppp-options {
+ mppe require
+ }
+}
```
The first version renders the following AccelPPP configuration:
```
[ppp]
mppe=None
```