SCSIRAIDGURU’s World
Cisco Virtual Lab Simulations
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SCSIraidGURU’s World

OSPF Virtual Link Part 2 (CCNP)

I took my previous simulation and expanded on it.  In part 1, I used a virtual-link on iosv-3 and iosv-4 to connect Area 0 on both sides together.  

https://virl.scsiraidguru.com/?page_id=1987

This is part 2 of OSPF Virtual Link.  I added Area 2 that is connected on the other side of Area 1. 

For part 3, I will be changing the right side 4 outside routers to all 4 stub types.  

iosv-3, iosv-4, iosv-7, iosv-8, iosv-11 and iosv-12 are ABR with virtual links.   Area 34 to 37 are not directly connected to Area 0 like Area 2.  iosv-7 is both and ABR and ASBR. In every simulation that has Flat-1 connected to an OSPF router makes that router an ASBR.    

Loopback address on each router is 172.20.x.x and fd00:172:20:x::x/64 where iosv-x has x as the router number.
OSPF Router-id is 10.4.x.x for IPv4 with x as the router number
OSPF Router-id is 10.6.x.x for IPv6 with x as the router number

I added the 172.20 ranges for IPv4 and IPv6 to the 60E static route tables.

 

Cisco Virtual Lab Zip File

iosv-3

iosv-7

iosv-4

ABR

ABR and ASBR

ABR

iosv-7 Sh IP OSPF and Sh IPv6 OSPF showing ABR and ASBR

iosv-8

iosv-11

iosv-12

ABR

ABR

ABR

iosv-1

iosv-2

iosv-5

iosv-6

iosv-9

iosv-10

The four routers below will be changed to all four stub types in the part 3.    In the four stub types: stub, totally stubby, NSSA, Totally NSSA certain rules apply:  

1.) All four types of stub ABRs don’t flood type 5 external routes in the area.
2.) Only Stub and NSSA ABRs flood type 3 summary LSAs into the area.
3.) Only NSSA and Totally NSSA allow redistribution of External LSAs into stubby areas.

 

iosv-13

iosv-14

iosv-15

iosv-16

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