6th Mock Lab - 90%

This was the only lab i finished 1 hour before its actual end (8h), but i spent another 2 hours afterwards reviewing my configurations. Luckily i found and corrected 2 issues, which would probably mean 2 lost tasks.

Besides that, i lost 5 tasks in this Mock Lab (level 8):

1) I lost 1 task (2 points), because i forgot to configure the ip address for a loopback interface!

2) I lost 1 task (3 points), because the proctor though (?) that i did the same mistake as in the previous mock lab (using default class to match in MLS). But, according to the solution provided, i was correct this time!!!

3) I lost 1 task (2 points), because i used a /20 for summarization instead of a /21. I just shouldn't have put into summarization the loopbacks of switches that were not supposed to be part of the routing domain.

4) I lost 1 task (2 points), because i used a little bit different statement:

My solution:

redistribute maximum-prefix 80 warning-only

Proctor's solution:

redistribute maximum-prefix 100 80 warning-only

My solution produces 2 logged messages, one at 60 (75% of 80) prefixes and one at 80 prefixes.
Proctor's solution produces 2 logged messages, one at 80 (80% of 100) prefixes and one at 100 prefixes.

The task was asking to generate a log message whenever more than 80 routes are redistributed. I guess both solutions should be correct.

5) I lost 1 task (3 points), because i used a different technique from the solution! According to the proctor i had more configuration on a router, than it was asked for ("use the minimum amount of statements").

My solution:

!  1st router: moving routes from RIP into OSPF
!
router ospf 1
 redistribute rip subnets route-map RIP->OSPF
!
route-map RIP->OSPF permit 10
 match metric 11 +- 5
 set tag 512010
!
route-map RIP->OSPF permit 20
 set tag 512005
!

! 2nd router : moving routes from OSPF into RIP
!
router rip
 redistribute ospf 1 route-map OSPF->RIP
!
route-map OSPF->RIP permit 10
 match tag 512010
 set metric 10
!
route-map OSPF->RIP permit 20
 match tag 512005
 set metric 5
!
route-map OSPF->RIP permit 100
 set metric 1

Proctor's solution:

!  1st router: moving routes from RIP into OSPF
!
router ospf 1
 redistribute rip subnets route-map RIP->OSPF
!
route-map RIP->OSPF permit 10
 match metric 1 2 3 4 5
 set tag 5
!
route-map RIP->OSPF permit 20
 set tag 10
!

! 2nd router : moving routes from OSPF into RIP
!
router rip
 redistribute ospf 1 route-map OSPF->RIP
!
route-map OSPF->RIP permit 10
 match tag 5
 set metric 5
!
route-map OSPF->RIP permit 20
 match tag 10
 set metric 10
!
route-map OSPF->RIP permit 30

I still don't understand how proctor's solution is supposed to work for the OSPF routes that don't match any tag, when they don't have a metric configured for redistribution under RIP. It's very well known that RIP expects a metric to be defined.

I guess, the best way would be to use "redistribute ospf 1 metric 1 route-map OSPF->RIP", or even better don't use the " match tag 10" under the "route-map OSPF->RIP permit 20" statement, so everything else (including the ospf tagged 10 routes) gets a metric of 10.

If you count the number of points i lost, you'll come up with a sum of 12, which means i should have gotten 88. The strange thing is that the whole lab sums up for 102 points!!!

This was the last Mock Lab. From now on, i'll keep on practicing on my PC using dynamips, trying to recreate all the difficult scenarios that i met in the online labs. I definitely need to speed things up.


10 days left till the REAL LAB!!!!