From: contactmarish@gmail.com
Date: Tue Feb 24 2009 - 05:16:33 ARST
Hi All,
I have facing one problem wih my static routing lab .In Internetworkexpert
version 5 there is one lab in static routing .plz find the lab Q below down.
3.3 Longest Match Routing
o7 Configure R4 and R5 with routes to each otherbs Loopback0 interfaces via
the point-to-point Serial interface between them.
o7 Configure R4 and R5 to route the rest of the 150.X.0.0/16 network via the
Frame Relay connection between them.
o7 Ensure that traffic between R4 and R5bs Loopback0 networks transits the
point-to-point link between them, but is rerouted out the Frame Relay
connection if the point-to-point link is down.
R4 loopback is = 150.1.4.4 255.255.255.0
R5 loopback is = 150.1.5.5 255.255.255.0
as mention in Q I configure R5 for R4 and R4 for R5
R5:
ip route 150.1.4.0 255.255.255.0 Serial0/1 ( this interface is point to point
link)
ip route 150.1.0.0 255.255.0.0 155.1.0.4 (this is a frame-relay link )
R4:
ip route 150.1.5.0 255.255.255.0 Serial0/1 ( this interface is point to point
link)
ip route 150.1.0.0 255.255.0.0 155.1.0.5 (this is a frame-relay link )
now my configuration is work fine and when I put tracroute on R4 its show me
that for reach R5 loopback it use R4 ponit to point serial link (155.1.45.4
point to point link s0/1 IP on R4) decision on the longest match
and when I shut this point to point link my R4 chose next longest match ip
which my frame-relay interfaec IP s0/0 ( 155.1.0.4 )
Ok
now through this step every thing is working fine BUT
when I put no shut on point to point serial interface ( as my knowledge now
router again chose the serial point to point interface for reach R5 loopback
on longest match decision )the sh ip route 150.1.5.0
show me to rach R5 loopback R4 chose s0/1 (point to point interface) but my
traceroute give me different result in tracroute router R4 chose 150.1.0.5 to
reach R5 loopback. why ..................... ?
thanks.
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