Routing

Basic BGP routing is built into l2tpns.

  BGP rather than OSPF
     Simpler implementation
     Fast withdrawal of routes on node failure
  Configuration:
    router bgp L
      neighbour IP remote-as R
  Routes advertised:
     Virtual LNS IP of the cluster (bind_address)
     Dynamic pool addresses (/etc/l2tpns/ip_pool)
     Per-session static IP addresses/routes:
         RADIUS Framed-IP-Address and Framed-Route
  Tied to cluster state:
     Routes advertised when a slave becomes up-to-date
     Withdrawn on becoming master with slaves