Thursday, May 02, 2013

It's Thursday, May 2, and let's get back to our CCNP ROUTE and TSHOOT practice exams and videos!  Enjoy!

--  Chris B.

1.  When you use the aggregate-address command in its default form to perform BGP route summarization, what routes will you see on the downstream routers that get advertisements containing the aggregate?

A.   The summary route 

B.   The summary route and the routes that were summarized

C.   No routes (the summary is locally significant only)

D.   Classful BGP routes only

E.   Classless BGP routes only

2.    When you look in your BGP routing table, you note that some routes have a next-hop of  What does that mean?

A.   The BGP database is corrupt.

B.   The route metrics are currently being calculated and those routes can't be used.   

C.   The network was originated by the local router.

D.   It's a summary route.

E.   The route was learned by route redistribution.

F.  The route was learned from an iBGP neighbor.

3.   Short answer:  What BGP routing table code tells you that a route was learned via route redistribution?

The answers right after this brief, important message!

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And now... the answers!

1. (B).   With BGP, if you use the aggregate-address command with no options, the summary route AND the routes that were summarized will be advertised.  If you want only the summary to be advertised, use the summary-only option with the aggregate-address command.

Be sure to watch today's CCNP ROUTE video for a live demo of this behavior.

2.  (C, E).   A next-hop of all zeroes can be one of two things -- a route learned through route redistribution, or a locally originated route.

3.  The symbol indicating a BGP route learned through route redistribution is the good ol' question mark.

Want more CCNP ROUTE practice exam questions?  Just click that link for other blog posts with ROUTE questions...

... and here's your CCNP ROUTE Video Of The Day!  Thanks for watching!

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