350-401 Pass on May 7th

jownck

May 7th pass Today. Several new questions will be selected
Multiple choice questions are roughly what is OVF, and one is SD-Access.
I have done 4 experimental questions, 3 question library coverage, OSPF1, OSPF authentication and EEM
The fourth question is about OSPF LSA filtering

The topology is roughly as follows

I might not remember the IP
R2 and R3 are ABRs, and the operation must be performed on ABRs, so that Loopback0 of R20 cannot enter area0. loopback0 of R1 cannot enter Area10. The operation cannot be performed in area 0.
The initial OSPF neighbors of all devices are established and all network segments are declared. R2 and R3 are configured with prefix-list by default. You need to complete the prefix-list. I used a filter-list to restrict the transmission of Lsas. The effect was achieved.
The original ABR prefix-list is as follows, and the name may be different from lab.

R2:
ip prefix-list denyR1Lo0 seq 2  permit 0.0.0.0/0 le 32


R3:
ip prefix-list denyR20Lo0 seq 2  permit 0.0.0.0/0 le 32


My configuration steps:
R2( [# r, |1 y. R8 }# l  B( O
ip prefix-list denyR1Lo0 seq 1 deny 10.1.1.1/32


router ospf 10  w- y  L. u% p( y3 c+ ?- r0 K! M
area 10 filter-list prefix denyR1Lo0 in


R3
ip prefix-list denyR20Lo0 seq 1  deny R20LO/32    (R20 Loopback0我忘记了）$ h' u' Z$ y! A- m9 n
  R4 `$ J' U+ `/ f9 {
6 p: u4 w. P  @: Q* y
router ospf 108 y7 N( J8 c4 q3 n4 k2 n8 N& |
area 20  filter-list  prefix denyR20Lo0 out


Verification:
The Loopback0 route of R20 is not displayed on the show ip route ospf on R1, but on ABR R3

The Loopback0 of R1 is not displayed in the show ip route ospf on R10. Procedure You can see it on other routers