Archive for the ‘OSPF’ Category

OSPF On-demand Circuits

OSPF on-demand configuration was designed for efficient operation over on-demand circuits like ISDN, X.25 switched virtual circuits (SVCs), and dialup lines. Since these are billed on usage basis, you don't want your OSPF protocol to keep these circuits up 24-7. This feature allows OSPF to suppress...
September 26th, 2008 | OSPF | Read More

IPv6 Summarization

I was working through IEWB Vol Lab 4 and ran across this summarization task for IPv6. I can do summarization when it comes to IPv4 but I was kind of sketchy on IPv6 summarization. Well I attempted the task and was close to say the least. So after I went through the whole task and got the details behind...
August 31st, 2008 | IEWB Vol 2, IPV6, OSPF | Read More

OSPF is done! Here are my notes for you to drool over

Technically I was suppose to start OSPF yesterday but I started working on it over the weekend. I already went through Narbik's soup-to-nuts labs before I attended the Bootcamp so I had some understanding about the labs. Now I have been working with the Advanced Technologies workbook for my OSPF prep....
July 15th, 2008 | OSPF | Read More

OSPF Network Types

If you are working on OSPF then you MUST know the different network types. I have been fortunate enough to be working with OSPF for sometime now so wanted to take some time and discuss all the Network types in OSPF. Broadcast: Default on Ethernet Hello interval 10 seconds Dead Interval 40 seconds DR/BDR...
July 14th, 2008 | OSPF | Read More

OSPF LSA Types

I was working through Narbik's OSPF labs and ran across a few notes that I took in the class. I believe way too many network engineers get stuck when it comes to LSA types and Narbik did a great job teaching us the concepts. Here is a nice visio I did to capture the concepts! Let me know how these help...
July 13th, 2008 | OSPF | Read More

Narbik’s Bootcamp – Day 2

I was not able to finish all the Frame-relay labs last night so I am already behind. I think I will dedicate my Saturday & Sunday for all the leftovers. Today we covered OSPF and EIGRP with 40% lecture and 60% hands-on labs. Narbik started off with OSPF lecture and covered every single thing about...
June 24th, 2008 | Bootcamp, EIGRP, OSPF | Read More

Narbik’s Soup-to-Nuts Workbook OSPF Lab 10

"Lab 10 - OSPF and NBMA" goes over the different OSPF network types. Broadcast, Non broadcast, point-to-point, point-to-multipoint etc. I really covered this last lab half sleeping because I have been in front of this computer for last 8 hours!!! I don't think I can take it any more. Its 11pm and I have...
June 17th, 2008 | Narbik WB, OSPF | Read More

Narbik’s Soup-to-Nuts Workbook OSPF Lab 9

"Lab 9 - Limiting the number of OSPF redistributed routes" goes over limiting the number of redistributed routes in OSPF. Never did this before in my life and this is an interesting option. When I see something for the first time, I want to make sure I read the documentation on it. So let's see what...
June 17th, 2008 | Narbik WB, OSPF | Read More

Narbik’s Soup-to-Nuts Workbook OSPF Lab 8

"Lab 8 - Redirecting traffic in OSPF" goes over how to define which path a router will use to get to a path if two equal cost paths are available. We can use the "max-metric" command under the router process. Router(config-router)#max-metric router-lsa This command will cause a router to originate LSAs...
June 17th, 2008 | Narbik WB, OSPF | Read More

Narbik’s Soup-to-Nuts Workbook OSPF Lab 7

"Lab 7 - Filtering routes in OSPF" One thing I have definitely learnt while working on these OSPF labs is that by default OSPF advertises loopbacks as /32 and in order for us to advertise the correct mask, we have to use ospf network type point-to-point. router(config)#interface loopback0 router(config-if)#ip...
June 17th, 2008 | Narbik WB, OSPF | Read More
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