Configuration Exercises

1

The routing configuration for Router A in Figure 13-7 is displayed in Example 13-33.

Figure 13-7. The network for Configuration Exercises 1 through 4.

Configure a route filter at A that will prevent subnet 172.16.12.0/24 from being known by any router other than E.

Example 13-33. Router A's configuration for the network shown in Figure 13-7.

router rip redistribute eigrp 1 metric 3 passive-interface Ethernet0 passive-interface Ethernet1 network 172.16.0.0 ! router eigrp 1 redistribute rip metric 10000 1000 255 1 1500 passive-interface Ethernet2 passive-interface Ethernet3 network 172.16.0.0

2

Configure a route filter at A in Figure 13-7 that will prevent D from learning about subnet 172.16.10.0/24.

3

Configure a route filter at A in Figure 13-7 that will allow only subnets 172.16.2.0/24, 172.16.8.0/24, and 172.16.9.0/24 to be advertised into the RIP domain.

4

Configure a route filter at A in Figure 13-7 that will prevent B from learning about any of the subnets in the RIP domain.

5

OSPFv3 for IPv6 is added to Routers A, B and C. RIPng is added to Routers A, D, and E. IPv6 prefixes 2001:db8:0:1::/64, 2001:db8:0:2::/64, and 2001:db8:0:3::/64 are connected to Router B. Prefixes 2001:db8:0:a::/64, 2001:db8:0:b::/64, and 2001:db8:0:c::/64 are connected to Router E. Configure a route filter at A in Figure 13-7 that prevents the prefixes 2001:db8:0:a::/64 and 2001:db8:0:b::/64 from being advertised to D.

6

Table 13-1 shows the interface addresses for all routers in Figure 13-8. Routers A and B are running EIGRP, and Routers E and F are running IS-IS. C and D are redistributing. Configure distance commands for C and D that will prevent loops and route feedback but will still allow redundant paths.

Table 13-1. The interface addresses of the routers in Figure 13-8.

Router	Interface	Address	Mask
A	E0 S0 S1 S2	192.168.1.1 192.168.10.254 192.168.10.249 192.168.10.245	255.255.255.0 255.255.255.252 255.255.255.252 255.255.255.252
B	E0 S0 S1	192.168.2.1 192.168.10.246 192.168.10.241	255.255.255.0 255.255.255.252 255.255.255.252
C	S0 S1 S2	192.168.10.253 192.168.10.234 192.168.10.225	255.255.255.252 255.255.255.252 255.255.255.252
D	S0 S1 S2	192.168.10.250 192.168.10.242 192.168.10.237	255.255.255.252 255.255.255.252 255.255.255.252
E	E0 S0 S1	192.168.4.1 192.168.10.226 192.168.10.229	255.255.255.0 255.255.255.252 255.255.255.252
F	E0 S0 S1 S2	192.168.3.1 192.168.10.230 192.168.10.233 192.168.10.238	255.255.255.0 255.255.255.252 255.255.255.252 255.255.255.252

Figure 13-8. The network for Configuration Exercises 6 through 8.

7

Using the distance command, configure Router D in Figure 13-8 to accept EIGRP routes only from Router A. If the link to A fails, D should not accept routes from Router B, although D should still advertise routes to B.

8

Remove the configuration added to D in Configuration Exercise 7. Configure Router C in Figure 13-8 to route to all destinations, including the networks and subnets of the IS-IS domain, via Router A. C should route through E and F only if the link to A fails.