IE WB 2 - Lab 1 - BGP Bestpath Selection

From: ccie az (ccieaz@googlemail.com)
Date: Wed Apr 16 2008 - 14:01:52 ART


Hi All,

This is from lab one, (which also makes up the free sample lab) the question is:

--- Configure a new Loopback interface on R1 with the IP address
150.X.11.1/24 and advertise it into BGP.

--- Configure AS 200 so that all traffic from AS 100 destined to this
prefix traverses the Ethernet segment between SW4 and R5.

--- In the case that the link between SW4 and R5 is down traffic
destined for the 150.X.11.0/24 prefix should transit the Frame Relay
link between R2 and R3.

--- Do not use AS-Path prepending to accomplish this.

So basically a BGP route is coming in from 2 different EBGP peers into
AS 200 and you need to perfer one route over the other. The solution
guide modifies the metric to answer this.

But what I did was to modify the origin to incomplete on one of the
peers (less preferred peer). I believe this answer would also be vaild
would you agree? If not, how come?

Thanks

Az

For reference the free sample can be found at:
http://www.internetworkexpert.com/downloads/iewb-rs.v4.00.sample.lab.pdf

Pass the CCIE in six weeks, Guaranteed!
http://www.certscience.com/CCIE



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