Both IS-IS and OSPF run on a network as shown in the following figure. Route import is configured on RTB and RTC respectively. All the routers are connected through GE interfaces. Routes to the network segment 2.2.2.2/32 is imported to the OSPF process using the import-route direct command on RTD. The default settings are retained for all the other configurations. Which of the following statements regarding this network is false?

Question

Both IS-IS and OSPF run on a network as shown in the following figure. Route import is configured on RTB and RTC respectively. All the routers are connected through GE interfaces. Routes to the network segment 2.2.2.2/32 is imported to the OSPF process using the import-route direct command on RTD. The default settings are retained for all the other configurations. Which of the following statements regarding this network is false?

Joshua Muentes · Accepted Answer

The following configuration can be performed on RTC to filter out routes from RTD to the network segment 2.2.2.2/32 when RTC imports OSPF routes:[RTC-acl-basic-2001]rule 5 deny source 2.0.0.0 0.255.255.255[RTC-acl-basic-2001]rule 10 permit[RTC-isis-1]filter-policy 2001 import

Joshua Muentes · Answer

The following configuration can be performed on RTC to filter out only routes to the network segment 2.2.2.2/32 when RTC imports routes:[RTC] ip ip-prefix 10 index 1 deny 2.0.0.0 8 less-equal 32[RTC-isis-1]filter-policy ip-prefix 10 import

Joshua Muentes · Answer

On RTB, adjust the IS-IS preference to 160 to avoid generation of sub-optimal routes on the network

Joshua Muentes · Answer

RTB learns that RTA is the next hop of the route to the network segment 2.2.2.2/32

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