junos默认包含下列路由表：
l inet.0 IPv4 unicast routes
l inet.1 IPv4 multicast routes
l inet.2 IPv4 unicast routes,used by multicast routing protocols to prevent routing loops(Reverse Path Forwarding/RPF)
l inet.3 the egress IP address of a MPLS label switched path (LSP).
l inet.4 information learned using the Multicast Source Discovery Protocol (MSDP).
l inet6.0 IPv6 unicast routes
l inet6.3 IPv6 tunneling mpls
l mpls.0 MPLS label values are stored
l bgp.l3vpn.0 stores routing information in a Layer 3 virtual private network (×××) environment
l bgp.l2vpn.0 stores routing information in a Layer 2 virtual private network (×××) environment
此处文章摘自juniper官网--整理by 春城狮子
If you do not create any, the JUNOS software uses its default routing tables, which are inet.0 for Internet Protocol Version 4 (IPv4) unicast routes, inet6.0 for Internet Protocol Version 6 (IPv6) unicast routes, inet.1 for the IPv4 multicast forwarding cache, and inet.3 for IPv4 Multiprotocol Label Switching (MPLS). If Multiprotocol Border Gateway Protocol (MBGP) is enabled, inet.2 is used for subaddress family indicator (SAFI) 2 routes.
