Solie "The Enchilada" BGP default route question

From: ying chang (ying_c@xxxxxxxxxxx)
Date: Mon Apr 29 2002 - 00:29:32 GMT-3


   
The question is from Solie's "The Enchilada" section X: BGP configuration,
question 3:

"Have R5 advertise a default route to the ATM network if and only if it has
the route 220.128.1.0/24."

For those who don't have the book, the topology is like below:

220.128.1.0--R4(AS4)---R7(As2001)----R2(AS2001)---R5(AS5)---eigrp---R6

Where ATM cloud is between R5 and R6, but any media would do.

I personally don't think this problem is solvable unless there is a default
route in R5 that we can redistribute into R6. Although the default route can
be generated from R4, R7 or R2 dynamically or statically define in R5, but
I'm not sure if it is allowed.

The solution provided from CiscoPress for this question is incorrect, it
generates default route towards to bgp world instead of R6. I am wondering
if someone has a creative way to solve this problem.

Thanks,
Chang



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