redistribution concepts(tweaking distanceto prevent loops)

From: lim es (tiga72@yahoo.com)
Date: Sun Apr 09 2006 - 04:09:53 GMT-3


Hi Group,

I've got this scenario and not sure if the concepts
are right or are there any other reasons to why we
might need to tweak the AD on border routers

==== Example =====

The need to lower the distance on r2 for eigrp
external routes when performing 2 way redistribution

r1  r2: runs eigrp (has an extroute 10.0.0.0)
r2  r3: runs ospf

r2 to perform 2 way route redistribution

[r1]-------------------[r2]------------------[r3]

Before redistribution:
r2: sh ip ro route 10.0.0.0/24

EX D 10.0.0.0/24

After redistribution:
r2: sh ip ro route 10.0.0.0/24

O E2 10.0.0.0/24

Conclusion: Loops for the 10.0.0.0/24 will occur after
the redistribution(on r2) if AD value is not adjusted
for eigrp external routes due to ospfs lower AD on
the same router

==== End of Example =====

any advice is appreciated

thanks:)

Lim



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