The task 1.2 is an error in the lab. R2 and R5 were connected someday, so
just enabling ppp would be sufficient. The solution IPexpert gives is
changing the interface to frame-relay and use the DLCI between these
routers.
I also lost several hours solving that.
I also agree with the no arp frame-relay. It's not needed to turn of
inverse-arp.
Indeed the default OAM timers are good enough, still I like to put on the
minimal timers to ensure it's fast enough. Still the default should be
enough so 'oam-pvc manage' command should be the only command needed.
The question asks that all routes are available when any of the links get's
disconnected. This means that you need all routes available in L1 and a
default is not enough. Besides that you need a /32 route to label switch
traffic to the loopback that's not in L1 and a default wouldn't do the job
there either.
For the password I would also set an area-password or domain-password,
depends on where authentication needs to be enabled (within a level or the
entire NET area), don't remember the question of that one.
'timers throtlle spf' is not a valid solutions, because I believe the task
requires that partial SPF calculations are performed when receiving an
update. That means ispf is the only valid solution, since this enables
partial calculation.
The throttle command sets timers for 'delaying' full SPF calculations.
Rick Mur
CCIE2 #21946 (R&S / SP)
[email protected]
On Tue, 2 Jun 2009 01:09:51 +0100
"Antonio Soares" <[email protected]> wrote:
Hello group,
I'm now starting Section 1 and i have some comments i would like to
see discussed:
Task 1.2) In the 7200/ATM topology, R2 is not directly connected to
R5. R2 connects to R4 and R4 connects to R5. So if this true,
this task is not so trivial as it seems. I lost several hours to make
it work. Basically i configured CRB in R4 and IRB in R2 and
R5. With the release i was using, the bridge was not working. Then i
moved to another release and the bridge started passing
traffic. Then i found another problem with IP traffic from R1 to R5.
The solution was using PPP between R2 and R5 instead of HDLC.
Task 1.3) Why do we need "no arp frame-relay" ? I'm convinced that
this command has not effect at all. And we don't need to
configure IETF in R1. The routers are smart enough to communicate
even if the encapsulation is IEFT in one side an CISCO in the
other end.
Task 1.4) The default OAM timers are enough to make it faster than
ISIS.
Task 2.2) Is this minimal configuration ? My options were
area-password and domain-password. And instead of using L2-to-L1 route
leaking, why don't we simply send the default route from R1 and R5 to
R2 ?
Task 3.3) Isn't the command "timers throttle spf" also valid for iSPF
?
Thanks.
Regards,
Antonio Soares, CCIE #18473 (R&S)
[email protected]
