Main specifications product description cisco 881 ethernet security router desktop device type router 4 port switch integrated enclosure type desktop data link protocol ethernet fast ethernet capacity ipsec vpn tunnels20 network transport protocol l2tp dhcp routing protocol rip 1 rip 2 hsrp vrrp gre policy based routing pbr remote management protocol telnet snmp 3 http https ssh cli features nat support auto uplink auto mdi mdi x mac addre