From: Nadeem Ansari (nadeem.ansari574@gmail.com)
Date: Tue Feb 24 2009 - 05:35:51 ARST
What show ip route shows on R4 at that time for R5 loopback interface
Regards
Nadeem
On Tue, Feb 24, 2009 at 12:46 PM, <contactmarish@gmail.com> wrote:
> 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
>
> o 7 Configure R4 and R5 with routes to each otherb s Loopback0 interfaces
> via
> the point-to-point Serial interface between them.
> o 7 Configure R4 and R5 to route the rest of the 150.X.0.0/16 network via
> the
> Frame Relay connection between them.
> o 7 Ensure that traffic between R4 and R5b s 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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