1、全局地址可达

Site1#ping 101.1.2.3 source 101.1.1.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 101.1.2.3, timeout is 2 seconds:

Packet sent with a source address of 101.1.1.2

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 16/34/52 ms

2、路由可达

Site1#show ip route

Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2

       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

       ia - IS-IS inter area, * - candidate default, U - per-user static route

       o - ODR, P - periodic downloaded static route, + - replicated route

Gateway of last resort is 101.1.1.4 to network 0.0.0.0

S*    0.0.0.0/0 [1/0] via 101.1.1.4

      2.0.0.0/32 is subnetted, 1 subnets

C        2.2.2.2 is directly connected, Loopback0

      101.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

C        101.1.1.0/24 is directly connected, FastEthernet0/0

L        101.1.1.2/32 is directly connected, FastEthernet0/0