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Here’s our first lab which I hope is going to help us hone the skills with OSPF point-to-point operation. First, a quick refresher. Cisco IOS OSPF..

This post contains the answers and configuration for the LAB1 Q1:What is the default OSPF mode of operation on F1/0..

  1. Point-to-point (Cisco)
  2. Broadcast (Cisco)
  3. Non-broadcast (RFC 2328)
  4. Point-to-multipoint (RFC 2328)
  1. Point-to-point (Cisco)
  2. Broadcast (Cisco)
  3. Non-broadcast (RFC 2328)
  4. Point-to-multipoint (RFC 2328)
  1. Point-to-point (Cisco)
  2. Broadcast (Cisco)
  3. Non-broadcast (RFC 2328)
  4. Point-to-multipoint (RFC 2328)
  1. Point-to-point (Cisco)
  2. Broadcast (Cisco)
  3. Non-broadcast (RFC 2328)
  4. Point-to-multipoint..
  1. What are the reasons to use multi-area rather than single area OSPF design?
  2. What are the OSPF router types
  3. What is ABR and its role?

Configure the strongest OSPF authentication between R2 and R3. On R3, enable authentication  under the routing process 

Routers use OSPF configuration from the lab 6.One thing to remember is that all routers within the same OSPF area

Routers use OSPF configuration from the lab 6. One thing to remember is that all routers within the same OSPF area

The first three methods (1-3) prevent prefixes from entering the routing table. The LSAs are still going to be present in.. 

  1. Ingress filtering using a ‘distribute-list’.
  2. Ingress filtering using a ‘distribute-list’ with a ‘route-map’.

The first three methods (1-3) prevent prefixes from entering the routing table. The LSAs are still going to be present in the LSDB since..

On R3, check the routing table. It should receive all prefixes from area 1. Configure router(s) so R3 does not receive any prefixes from R1 and R2

In R1 configure two additional loopback interfaces with IP addresses 192.168.1.1/28 and 192.168.1.17/28. Advertise these 

Use the Lab 14 final configuration in this one. Check the routing table on R4. Area 2 should accept all LSAs (LSAs 1-5).

On R4 advertise a network 192.168.4.0/24 as external E2 prefixes. Do not create loopback 

Use topology Lab14. OSPF should be enabled on all interfaces with the most specific wildcard mask. On R1 create a new loopback interface with the

Configure IP addresses and OSPF  according to the topology. Advertise loopback interfaces in

Topology and configuration as per initial configuration in the lab 18. Configure all routers according to the topology..

On R1 check the paths towards 10.1.23.0/24. Manipulate the OSPF cost so R1 prefers R2 towards 10.1.23.0/24.

Use OSPF point-to-multipoint on the Frame-Relay connections (configuration and topology from Lab20). On R1 check..

Use OSPF point-to-multipoint on the Frame-Relay connections (configuration and topology from Lab20).

In order to support 1 Gbps interfaces, change the way OSPF calculates the cost. The cost of FastEthernet interface should In 

Configure OSPF in area 0, area 1 and area 2 as per. Configure OSPF in area 3 as per pic. 1. Make sure that all routers in area 3 have full reachability to the rest of the network. Configure OSPF   in area 0..

Configure OSPF in area 0, area 1 and area 2 as per. Configure OSPF in area 3 as per pic. 1. Make sure that all routers in area 3 have full reachability to the rest of the network. Configure OSPF   in area 0..

Configure OSPF so that area 0 is contiguous as per OSPF design requirements. Do not change areas already configured.

Configure OSPF according to pic 1. Create a virtual link between R1 and R4 allowing 

On R4 check the OSPF routing table. Also, check what cost R2 advertises towards 

Configure area 1 so that the LSAs never age out in this area. Configure area 1 so that the LSAs never age out in this area.

Configure OSPF so that there is no hello packets exchanged on point-to-point link between R1 and R3. LSAs should not be refreshed every 30