SOLUTION-10-consider-three-lans-interconnected-two-routers-shown...
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P14. Consider three LANs interconnected by two routers, as shown in Figure 6.33.
a. Assign IP addresses to all of the interfaces.
For Subnet 1 use addresses of the form 192.168.1.xxx
for Subnet 2 uses addresses of the form 192.168.2.xxx
for Subnet 3 use addresses of the form 192.168.3.xxx.
Subnet 1 Subnet 2 Subnet 3
c. Consider sending an IP datagram from Host E to Host B. Suppose all of the ARP tables
are up to date. Enumerate all the steps, as done for the single- outer example in Section
6.4.1.
1. Forwarding table in E determines that the datagram should be routed to interface
192.168.3.002.
2. The adapter in E creates and Ethernet packet with Ethernet destination address 88-88-
88-88-88-88.
3. Router 2 receives the packet and extracts the datagram. The forwarding table in this
router indicates that the datagram is to be routed to 198.162.2.002.
4. Router 2 then sends the Ethernet packet with the destination address of 33-33-33-33-
33-33 and source address of 55-55-55-55-55-55 via its interface with IP address of
198.162.2.003.
5. The process continues until the packet has reached Host B.
192.168.3.003
99-99-99-99-99-99
192.168.3.002
88-88-88-88-88-88
192.168.3.001
77-77-77-77-77-77
192.168.2.003
55-55-55-55-55
192.168.2.001
44-44-44-44-44-44
192.168.2.002
33-33-33-33-33-33
A
B
SW
Router 1
SW
C
D
F
192.168.1.001
00-00-00-00-00-00
192.168.1.002
22-22-22-22-22-22
192.168.1.003
11-11-11-11-11-11
E
Router 2
SW
192.168.2.004
66-66-66-66-66
192.168.2.003
55-55-55-55-55
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