R2 SO/0 18 Link 1 21.10.6.16/30 S0/1 Link 2 21.10.6.20/30 R1.21 S0/2 .17 72 SO/0 25...
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R2 SO/0 18 Link 1 21.10.6.16/30 S0/1 Link 2 21.10.6.20/30 R1.21 S0/2 .17 72 SO/0 25 22 S0/0 RIPv2 Packet from R3 Subnet Hops 5 62.18.50.0/23 66.1.0.0/16 144.5.9.0/25 151.9.0.0/16 Code Destination Subnet Metric (Hops) 33 R3 Link 3 21.10.6.24/30 4 1. In the network above, routers R1, R2, R3 and R4 are running RIPv2 with Split Horizon enabled. R1 has serial links to R2, R3 and R4 as shown. R2, R3 and R4 have links to other routers that are not shown. Router R1 has just powered up and its routing table is empty. R1 has just received the following RIPv2 packets from R2, R3 and R4. Note that these are all Cisco routers, so each of these routers incremented the hop counts before they sent these RIPv2 packets to R1. RIPv2 Packet from R2 Subnet Hops 62.18.50.0/23 3 144.5.9.0/25 2 151.9.0.0/16 4 201.18.0.0/16 4 S0/1 26 Outgoing Interface R4 RIPv2 Packet from R4 Subnet Hops 6 62.18.55.0/25 66.1.0.0/16 144.5.9.0/25 201.18.0.0/16 a) (4 points) Given the contents of the RIPv2 message from R4, what is the Metric value for Subnet 66.1.0.0/16 in the R4 routing table? Hops 4 1 3 b) (10 points) Show the contents of the R1 routing table, for each of the columns below, after it has processed these three RIPv2 packets. Be sure to include the directly connected subnets as well as the remote subnets learned through RIP. The "Code" values will either be 'C' or 'R'. The "Next Hop IP" values must be IP addresses. Router R1 Routing Table Next Hop IP c) (6 points) After these changes to its routing table, Router R1 now sends a new RIPv2 message out interface S0/0 to Router R4. Show the contents of this message. RIPv2 from R1 to R4 Subnet 4. Router X is running EIGRP and is connected to Router A out port S0/2/0, Router B out port S0/2/1 and Router C out port S0/2/2. Through EIGRP update messages, router X learns about three possible paths to destination 192.168.3.0/24, which are stored in the Topology Table shown below. For each of the 3 paths to destination 192.168.3.0/24 from Router X, the Topology Table shows the Reported Distance (or Advertised Distance) and also the EIGRP Metric, for that path. Topology Table in Router X Destination 192.168.3.0/24 192.168.3.0/24 192.168.3.0/24 Out Interface SO/2/0 SO/2/1 SO/2/2 Subnet 150.66.30.0/24 100 Mbps Ethernet R2 R3 Neighbor Reported Distance Router A a) (5 points) Which of these three routes will become the successor route and be placed into the routing table? The Metric for this route then is called the feasible distance. You should assume there is no unequal-cost load balancing, so only one route is placed into the routing table. Router B Router C b) (5 points) Given your answer to (a), which of the other 2 routes are feasible successor routes that will be stored in the Topology Table? In other words, which routes meet the feasibility condition? Explain how you determine this. R1 Destination 150.66.30.0/24 150.66.30.0/24 2651798 2651794 2651827 Serial 2 Mbps EIGRP Metric 2651822 2651832 2651841 R2 100 Mbps Ethernet 5. (10 points) Consider the 3-router network above. Assume routers R1, R2 and R3 run EIGRP and are synchronized. Assume both R1 and R2 have set the Bandwidth on their serial link interfaces to 2 Mbps (using command bandwidth 2000). Assuming default EIGRP metric calculation and delay values, fill in the values below, showing the Minimum Bandwidth in Kbps, the Total Path Delay in microseconds, and EIGRP Metric for the path from R2 to destination subnet 150.66.30.0/24 and the path from R3 to the same destination. Source Router Min. Bandwidth Total Path Delay EIGRP Metric R3 R2 SO/0 18 Link 1 21.10.6.16/30 S0/1 Link 2 21.10.6.20/30 R1.21 S0/2 .17 72 SO/0 25 22 S0/0 RIPv2 Packet from R3 Subnet Hops 5 62.18.50.0/23 66.1.0.0/16 144.5.9.0/25 151.9.0.0/16 Code Destination Subnet Metric (Hops) 33 R3 Link 3 21.10.6.24/30 4 1. In the network above, routers R1, R2, R3 and R4 are running RIPv2 with Split Horizon enabled. R1 has serial links to R2, R3 and R4 as shown. R2, R3 and R4 have links to other routers that are not shown. Router R1 has just powered up and its routing table is empty. R1 has just received the following RIPv2 packets from R2, R3 and R4. Note that these are all Cisco routers, so each of these routers incremented the hop counts before they sent these RIPv2 packets to R1. RIPv2 Packet from R2 Subnet Hops 62.18.50.0/23 3 144.5.9.0/25 2 151.9.0.0/16 4 201.18.0.0/16 4 S0/1 26 Outgoing Interface R4 RIPv2 Packet from R4 Subnet Hops 6 62.18.55.0/25 66.1.0.0/16 144.5.9.0/25 201.18.0.0/16 a) (4 points) Given the contents of the RIPv2 message from R4, what is the Metric value for Subnet 66.1.0.0/16 in the R4 routing table? Hops 4 1 3 b) (10 points) Show the contents of the R1 routing table, for each of the columns below, after it has processed these three RIPv2 packets. Be sure to include the directly connected subnets as well as the remote subnets learned through RIP. The "Code" values will either be 'C' or 'R'. The "Next Hop IP" values must be IP addresses. Router R1 Routing Table Next Hop IP c) (6 points) After these changes to its routing table, Router R1 now sends a new RIPv2 message out interface S0/0 to Router R4. Show the contents of this message. RIPv2 from R1 to R4 Subnet 4. Router X is running EIGRP and is connected to Router A out port S0/2/0, Router B out port S0/2/1 and Router C out port S0/2/2. Through EIGRP update messages, router X learns about three possible paths to destination 192.168.3.0/24, which are stored in the Topology Table shown below. For each of the 3 paths to destination 192.168.3.0/24 from Router X, the Topology Table shows the Reported Distance (or Advertised Distance) and also the EIGRP Metric, for that path. Topology Table in Router X Destination 192.168.3.0/24 192.168.3.0/24 192.168.3.0/24 Out Interface SO/2/0 SO/2/1 SO/2/2 Subnet 150.66.30.0/24 100 Mbps Ethernet R2 R3 Neighbor Reported Distance Router A a) (5 points) Which of these three routes will become the successor route and be placed into the routing table? The Metric for this route then is called the feasible distance. You should assume there is no unequal-cost load balancing, so only one route is placed into the routing table. Router B Router C b) (5 points) Given your answer to (a), which of the other 2 routes are feasible successor routes that will be stored in the Topology Table? In other words, which routes meet the feasibility condition? Explain how you determine this. R1 Destination 150.66.30.0/24 150.66.30.0/24 2651798 2651794 2651827 Serial 2 Mbps EIGRP Metric 2651822 2651832 2651841 R2 100 Mbps Ethernet 5. (10 points) Consider the 3-router network above. Assume routers R1, R2 and R3 run EIGRP and are synchronized. Assume both R1 and R2 have set the Bandwidth on their serial link interfaces to 2 Mbps (using command bandwidth 2000). Assuming default EIGRP metric calculation and delay values, fill in the values below, showing the Minimum Bandwidth in Kbps, the Total Path Delay in microseconds, and EIGRP Metric for the path from R2 to destination subnet 150.66.30.0/24 and the path from R3 to the same destination. Source Router Min. Bandwidth Total Path Delay EIGRP Metric R3
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Solutions Step 1 a R4 RIPV2 Packet Analysis i What is the Metric value for Subnet 201180016 in the R4 routing table The metric value for a subnet in RIP is the sum of the hop counts In the RIPV2 packe... View the full answer
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Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
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