To configure OSPF on Router2 – CLI

config router ospf

set router-id 10.11.101.2 config area

edit 0.0.0.0 next

end

config network edit 1

set prefix 10.11.0.0/255.255.0.0 next

end

config ospf-interface

edit “Router2-Internal” set interface “port1” set priority 255

next

edit “Router2-External” set interface “port2”

next

edit “Router2-DSL”

set interface “port3” set cost 50

next end

end

 

Configuring OSPF on Router3

Router3 is more complex than the other two routers. The interfaces are straightforward, but this router has to import and export routes between OSPF and BGP. That requirement makes Router3 a border router or ASBR. Also Router3 needs a lower cost on its route to encourage all traffic to the Internet to route through it.

In the advanced OSPF options, Redistribute is enabled for Router3. It allows different types of routes, learned outside of OSPF, to be used in OSPF. Different metrics are assigned to these other types of routes to make them more or less preferred to regular OSPF routes.

 

To configure OSPF on Router3 – web-based manager

1. Go to Router > Dynamic > OSPF.

2. Set Router ID to 11.101.2 and select Apply.

3. Expand Advanced Options.

4. In Redistribute, set the following information, and select OK.

 

Route type                                    Redistribute                                   Metric

Connected                                       Enable                                                15

Static                                                Enable                                                15

RIP                                                   Disable                                               n/a

BGP                                                  Enable                                                5

5. In Areas, select Create New, set the following information, and select OK.

Area                                            0.0.0.0

Type                                            Regular

Authentication                           none

6. In Networks, select Create New, set the following information, and select OK.

IP/Netmask                                 10.11.0.0/255.255.0.0

Area                                            0.0.0.0

7. In Interfaces, select Create New, set the following information, and select OK.

Name                                           Router3-Internal

Interface                                     port1 (Internal)

IP                                                 0.0.0.0

Authentication                           none

Timers (seconds)

Hello Interval           10

Dead Interval            40

8. In Interfaces, select Create New, set the following information, and select OK.

Name                                           Router3-Internal2

Interface                                     port2 (Internal2)

IP                                                 0.0.0.0

Authentication                           none

Timers (seconds)

Hello Interval           10

Dead Interval            40

9. In Interfaces, select Create New, set the following information, and select OK.

Name                                           Router3-ISP-BGP

Interface                                     port3 (ISP-BGP)

 

IP	0.0.0.0
Authentication	none
Cost	2
Timers (seconds)
Hello Interval	20
Dead Interval	80

10. Using the CLI, enter the following commands to set the priority for the Router3-Internal OSPF interface to ensure this interface will become the BDR.

config router ospf

config ospf-interface edit Router3-Internal set priority 250

next end

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