, , - . - Ethernet, (MAC) (?).
Ip route
, , -, , IP . , . ARP IP .
Ip route 10.6.0.0 255.255.0.0 Serial1 (1)
Ip route 10.7.0.0 255.255.0.0 10.4.0.2 (2)
10.6.0.0/16 Serial1. 10.7.0.0/16 IP 10.4.0.2 10.7.0.0/16. ( S):
S 10.6.0.0 via Serial1
S 10.7.0.0 [1/0] via 10.4.0.2
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, Ethernet (2) ip route. Ethernet , , Ethernet . ip route IP ARP .
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IP 0.0.0.0 0.0.0.0,
ip route 0.0.0.0 0.0.0.0 [ | ]
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IP . (loopback). . - , loopback, . interface loopbackN int lN, N .
Router(conf)> int l0 1.1.1.1 255.0.0.0
trace
trace , . ICMP, ping, , . trace (Time To Live, TTL). . trace , . . trace
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ARP
1. Router1 ARP
Router1# show arp
MAC Ethernet IP 10.1.1.1.
2. router2 ARP . MAC Ethernet IP 10.1.1.2
3. Ethernet Router1
Router2#ping 10.1.1.1
4. ARP . . MAC Ethernet Router1 IP 10.1.1.1.
5. router1 ARP .
MAC Ethernet Router2 IP 10.1.1.2. , Router1 IP ? , Router1 Router2 MAC Ethernet Router2 IP 10.1.1.2, ARP .
Router2 Router4 - . .
1. router2. 172.16.10.1 172.16.10.2.
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Router2# show ip route
. 172.16.10.0/24. 172.16.10.0/24 10.1.1.1 :
Router2(config)# ip route 172.16.10.0 255.255.255.0 10.1.1.1
172.16.10.0/24 - 172.16.10.0 255.255.255.0. 255.255.255.0 24 , /24.
2. serial Router1
Router2# ping 172.16.10.1
3. serial Router4.
Router2# ping 172.16.10.2
? , ICMP , Router4, Router4 .
4. router4.
Router4# show ip route
10.1.1.0/24. 10.1.1.0/24 172.16.10.1 :
Router4(config)# ip route 10.1.1.0 255.255.255.0 172.16.10.1
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5. . .