Comments on: OSPF Lab #2 Tasks

By: Daniel M.

Daniel M. — Tue, 02 Aug 2011 05:36:01 +0000

8. A more efficient way would be to create a static for 192.168.0.0/21. You use up less of the Class C range.

By: Vlad

Vlad — Tue, 03 May 2011 09:02:50 +0000

3. an easier way to do it will be to configure R2 as a stub router with the command:

“max-metric router-lsa”

under router ospf process

By: Vlad

Vlad — Thu, 31 Mar 2011 21:23:28 +0000

1. Same like Ragmac
2. Pending
3. On R2 I’ve filtered out all the routes from area 0 to enter area 245. This way R6 will learn area 0 routes from R4 only

“ip prefix-list FILTER seq 5 deny 0.0.0.0/0 le 32

router ospf 12
area 245 filter-list prefix FILTER in”

4. Same like Ragmac
5. Virtual-link
6. Under interface S0/1 on R4 and R5 use “ip ospf demand-circuit” command
7. On R2 create route-map that’s denying all the loopback0 interfaces. Use distribute-list and apply the route-map in.

”
access-list 3 permit 1.1.1.1
access-list 3 permit 2.2.2.2
access-list 3 permit 3.3.3.3
access-list 3 permit 4.4.4.4
access-list 3 permit 5.5.5.5
access-list 3 permit 6.6.6.6
access-list 3 permit 7.7.7.7

route-map FILTER_LOOP deny 10
match ip address 3
!
route-map FILTER_LOOP permit 20

router ospf 12
distribute-list route-map FILTER_LOOP in”

8. Create loopback interfaces. Create a static route for 192.168.0.0/16 pointing to null 0. Redistribut static under OSPF.

9. NBMA with neighbor statements

By: Eisenberger Lukas

Eisenberger Lukas — Sun, 08 Aug 2010 18:39:01 +0000

I think task nr 3 is not about a virtual link. Virtual link is task nr 5.
In number three all prefixes announced out of the backbone are should get accessed over R4 in point of view of R6.

I solved that by changing the ospf network type to point-to-multipoint in area 245. And I made two neighorstatements on R6 with:

neighbor 10.1.245.2 cost 65535
neighbor 10.1.245.4 cost 1

By: Ragmac

Ragmac — Mon, 31 May 2010 16:26:30 +0000

Posting my solution for your review.

1. Use NBMA with neighbor statements for R1, R2 ,R3 and R4.

2. Pending

3. Created a virtual-link on R6 for Area 245 to connect to Area 0

4. Totally stubby area accomplish this.

5. See 3.

6. Pending.

7. Crate access list denying All LBK and do a permit any. Create distribute list “out” on R1.

8. Pending.

9. USE ip ospf network broadcast.