I should have looked at this a little closer when I was performing the tasks.. It makes no real difference what Area the Lo0 int is associated with on R1, unless there are specific requirements.. The requirement of "appropriate" area is what kind of made me think more about it. Other ABR's will still provide routing, ie R6 or R5.. I believe the biggest point in all of the bullets for this was to be sure to create the VL between R1/R5 in the event the Area0 between R6/R2 was impacted..
Thanks, Don -----Original Message----- From: Jason Maynard [mailto:[email protected]] Sent: Sunday, May 08, 2011 10:48 PM To: Don Lundquist; [email protected] Subject: RE: [OSL | CCIE_RS] Workbook 3, Lab9, Task 2.3, Bullet #2 Hey Don, Not sure I am following this but I will give it a try (just had a quick look ;) ) Where I would say that you may have went in the wrong was R1 and R5 indicated to put all other loopbacks into their appropriate areas (not to create an area 0) so.... R1 - Loopback can be area 16 or 15 R5 - Loopback can be area 15 or 25 HTH - and if I am off base you or someone will guide me straight :/ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Don Lundquist Sent: May-08-11 9:25 PM To: [email protected] Subject: [OSL | CCIE_RS] Workbook 3, Lab9, Task 2.3, Bullet #2 I went through this section relatively quickly but at the end I was curious as I did something a little different than what is provided in the DSG... The second bullet states: .... Add the Loopback0 interface of each of the other devices (R5/R1) to the appropriate area.. The subsequent bullets discuss connectivity between loopbacks throughout the OSPF network need to be maintained and if connectivity is lost between R2/R6, they must be able to reach each others Loopback0 intf's... I added the loopbacks of R1/R5 to Area 0, via virtual-links to either R1->R5->R2 or via R1->R6... The DSG has them listed as being installed to Areas other than 0 which are connected via physical interfaces.. Are there any caveats I am overlooking by placing them in Area 0 and utilizing the redundant Virtual-Links... R2#sho ip route ospf 70.0.0.0/8 is variably subnetted, 15 subnets, 4 masks O 70.18.103.1/32 [110/3] via 70.18.26.6, 00:17:08, FastEthernet0/0.26 [110/3] via 70.18.25.5, 00:22:46, FastEthernet0/0.25 R1# interface Loopback0 ip address 70.18.103.1 255.255.255.255 ip ospf 7018 area 0 ! router ospf 7018 router-id 1.1.1.1 log-adjacency-changes area 15 virtual-link 5.5.5.5 authentication message-digest area 15 virtual-link 5.5.5.5 message-digest-key 1 md5 cisco area 16 virtual-link 6.6.6.6 authentication message-digest area 16 virtual-link 6.6.6.6 message-digest-key 1 md5 cisco Thanks, Don _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
