In this series of posts lets configure OSPF Totally Stubby Area, but before proceeding further let’s summarise the below topology
Two OSPF Areas Area 0 and Area 5
R1, R2 and R4 are part of Area 0 and OSPF is configured on the directly connected links on each router ( R1 – R2 link , R1-R4 link)
R4 has four loop back interfaces loopback 1 (10.0.1.1) , loopback 2 (10.0.2.2) ,loopback 3 (10.0.3.3) and loopback 4 (10.0.4.4) ,these loopback interfaces networks are redistributed into OSPF
R2-R3 are part of Area 5, R2 happened to be a ABR
OSPF Area 5 is configured on the interfaces connected between R2-R3.
Currently Area 5 is a normal area and its not been configured as a totally stubby area, R2 installs the R4 loopback interface networks as Type 5 LSA and forward the same to Area 5
We can see from the below snap shot R2 received R4 loopback networks as Type 5 LSAs and the routes are installed as Type 2 External OSPF routes, also we could see the interface connecting R1-R4 are also advertised as Type 3 LSA
R3 sees R4 loopback interfaces network as Type 5 LSA and R1-R4 , R1-R2 links network 192.168.14.0/29 , 192.168.12.0/29 as Type 3 LSAs
In next post, let’s see by what impact Area 5 will have especially after configuring it as OSPF Totally Stubby Area.
Cisco VIRL comes with an internal SSH and Telnet client which is quite good and it opens all the SSH and telnet sessions within VMMaestro GUI, but if someone wants to use Secure CRT on their MAC as an external client, one can easily configure the changes in VIRL VMMaestro,
When it comes to choosing a CCIE track most of the CCIE aspirers are confused, every day I encounter at least one CCIE aspirers approaching me for advice. Some times I petty them but there are in need of guidance, so I morally try to support them and guide them to best of my ability.
Why are most of them are confused in choosing CCIE tracks?
Its been observed that most of them are confused at the step 1 of CCIE, they struggle to choose a CCIE track for them, some of them try to meet instructor after instructor of different tracks to select the CCIE track, this makes them more confused. Even I have seem some people start with a CCIE track A for few months and then again they change their track to track B, this is not a good sign for some one who already started the journey of CCIE.
I believe most of them want to choose a CCIE track for different reasons like
Which CCIE track is in more demand?
Which CCIE track is easy to pass?
Which CCIE track offers me more remuneration?
Which CCIE track is easy to simulate?
Which CCIE track costs less?
So and so forth, well these are not the valid reasons to select a CCIE track. I strongly believe there should be strong desire and passion towards a particular track, which comes out when you ask the series of questions which mentioned in the article “ The Journey of CCIE – Series 1”. Yet some people may need some sort of Pre CCIE counselling in selecting a CCIE track and planning their journey.
Well, as per my knowledge no one is offering such service if someone wants to seek any guidance they can reach me out I can assist them in choosing their passions. Yes, CCIE is a passion and can be only achieved when someone gives more than 100%. Please do feel free to reach me out, I will more than glad to help you.