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| Townsend 2003-06-18, 7:13 am |
| You are configuring a totally stubby area in OSPF. What configuration must the ABR have that are not required on the Internal area routers?
A. A virtual link to area 0
B. OSPF summarization command
C. default-cost extension to the area command
D. no-summary extension to the area stub command
I believe the answer should be "D". Others say "A", however, it seems to me that a virtual link would only be necessary if the ABR was not connected to area 0. Which is not mentioned in this question. Please tell me what you think.
Thanks. | |
| darthfeces 2003-06-18, 10:30 am |
| stub no-summary
why a virtual link ?
this is considered bad design and should
only be used as a temporary solution. | |
| jane55 2003-06-19, 5:25 pm |
| Virtual link is use to join 2 networks e.g., if a company purchase another company that has an area 0, (can’t have 2 area 0 on the same network), but you could use a virtual link to connect them?
Stub makes your routing table and database smaller so use no-summary on your ABR to keep your stub/totally stub free of unnecessary routes. Stub doesn’t accept routes from external routers and totally stub doesn’t accept ABR/external routes so you would configure your ABR with no–summary. | |
| jgreenie 2003-06-19, 6:12 pm |
| Others say "A" ????? I was just wondering---who are those "others"??? Virtual link makes no sense; it has nothing to do with stubby areas---at least "B" sounds like it may have something to do with it----of course "A" is correct. | |
| Townsend 2003-06-20, 3:32 pm |
| Thanks everyone! It looks like most everyone agrees it should be D. |
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