used if the LAC requests authentication.
</LI>
+<LI><B>l2tp_mtu</B> (int)<BR>
+MTU of interface for L2TP traffic (default: 1500). Used to set link
+MRU and adjust TCP MSS.
+</LI>
+
+<LI><B>ppp_restart_time</B> (int)<BR>
+<B>ppp_max_configure</B> (int)<BR>
+<B>ppp_max_failure</B> (int)<BR>
+PPP counter and timer values, as described in §4.1 of
+<a href="ftp://ftp.rfc-editor.org/in-notes/rfc1661.txt">RFC1661</a>.
+</LI>
+
<LI><B>primary_dns</B> (ip address)
<LI><B>secondary_dns</B> (ip address)<BR>
Whenever a PPP connection is established, DNS servers will be sent to the
Interface for cluster packets (default: eth0).
</LI>
+<LI><B>cluster_mcast_ttl</B> (int)<BR>
+TTL for multicast packets (default: 1).
+</LI>
+
<LI><B>cluster_hb_interval</B> (int)<BR>
Interval in tenths of a second between cluster heartbeat/pings.
</LI>