tc@box:~$ vtysh

Hello, this is Quagga (version 0.99.24-rc1).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

box# en
box# conf t
box(config)# router 
  babel  Babel
  bgp    BGP information
  eigrp  Start EIGRP configuration
  isis   ISO IS-IS
  ospf   Start OSPF configuration
  ospf6  Open Shortest Path First (OSPF) for IPv6
  rip    RIP
  ripng  RIPng
box(config)# router eigrp 1
box(config)# network 10.10.1.0/24 
% Unknown command.