Troubleshooting Exercises
Identify the mistake in the configuration in Example 4-33.
Example 4-33 Configuration for Troubleshooting Exercise 1
ip nat pool EX1 192.168.1.1 192.168.1.254 netmask 255.255.255.0 type match-host ip nat pool EX1A netmask 255.255.255.240 address 172.21.1.33 172.21.1.38 address 172.21.1.40 172.21.1.46 ip nat inside source list 1 pool EX1 ip nat inside source static 10.18.53.210 192.168.1.1 ip nat outside source list 2 pool EX1A ! access-list 1 permit 10.0.0.0 0.255.255.255 access-list 2 permit 192.168.2.0 0.0.0.255
RTR1 in Figure 4-30 connects two internetworks with overlapping addresses.
Figure 4-30 The Internetwork for Troubleshooting Exercise 2
NAT is implemented on the router as configured in Example 4-34, but devices cannot communicate across the router. What is wrong?
Example 4-34 Configuration for Troubleshooting Exercise 2
interface Ethernet0 ip address 172.16.10.1 255.255.255.0 ip nat inside ! interface Ethernet1 ip address 172.16.255.254 255.255.255.0 ip nat outside ! router ospf 1 redistribute static metric 10 metric-type 1 subnets network 10.0.0.0 0.255.255.255 area 0 ! ip nat translation timeout 500 ip nat pool NET1 10.1.1.1 10.1.255.254 netmask 255.255.0.0 ip nat pool NET2 192.168.1.1 192.168.255.254 netmask 255.255.0.0 ip nat inside source list 1 pool NET1 ip nat outside source list 1 pool NET2 ! ip classless ! ip route 10.1.0.0 255.255.0.0 Ethernet0 ip route 192.168.0.0 255.255.0.0 Ethernet1 ! access-list 1 permit 172.16.0.0 0.0.255.255
Refer to the configurations of Cozumel and Guaymas in Figure 4-21. If the first line of access list 1 in both configurations is removed, what is the result? Can Guaymas and Cozumel still ping each other?
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