RE: OSPF LSA Type after Area Range and Summary Address

From: Victor Cappuccio (victor@ccbootcamp.com)
Date: Tue Apr 24 2007 - 21:13:04 ART


Hi WorkerBee

Something Like this?

R3(config-router)#red con
% Only classful networks will be redistributed
R3(config-router)#red con sub
R3(config-router)#
rack11>3
[Resuming connection 3 to R3 ... ]

R3(config-router)#
R3(config-router)#
R3(config-router)#do show ip route ospf
     1.0.0.0/24 is subnetted, 4 subnets
O 1.1.24.0 [110/8694] via 1.1.34.4, 00:00:09, Serial0/0/0.34
     2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/4348] via 1.2.23.2, 00:00:09, FastEthernet0/0
     4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/4348] via 1.1.34.4, 00:00:09, Serial0/0/0.34
     150.1.0.0/16 is variably subnetted, 2 subnets, 2 masks
O 150.1.0.0/16 is a summary, 00:00:00, Null0
R3(config-router)#
rack11>4
[Resuming connection 4 to R4 ... ]

R4#
R4#show ip route ospf
     1.0.0.0/24 is subnetted, 4 subnets
O 1.2.23.0 [110/8694] via 1.1.34.3, 00:00:17, Serial0/0/0.34
O E2 1.1.23.0 [110/20] via 1.1.34.3, 00:00:07, Serial0/0/0.34
     2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/8695] via 1.1.34.3, 00:00:17, Serial0/0/0.34
     3.0.0.0/32 is subnetted, 1 subnets
O E2 3.3.3.3 [110/20] via 1.1.34.3, 00:00:07, Serial0/0/0.34
O E2 150.1.0.0/16 [110/20] via 1.1.34.3, 00:00:07, Serial0/0/0.34
R4#
R4#
rack11>3
[Resuming connection 3 to R3 ... ]

*Apr 25 00:32:18.372: tagcon: peer 2.2.2.2:0 (pp 0x467F0CE0): advertise
150.1.0.0/16, label 3 (imp-null) (#54)
*Apr 25 00:32:18.372: tagcon: peer 4.4.4.4:0 (pp 0x4617ED7
R3(config-router)#
R3(config-router)#do show ip route ospf
     1.0.0.0/24 is subnetted, 4 subnets
O 1.1.24.0 [110/8694] via 1.1.34.4, 00:00:25, Serial0/0/0.34
     2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/4348] via 1.2.23.2, 00:00:25, FastEthernet0/0
     4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/4348] via 1.1.34.4, 00:00:25, Serial0/0/0.34
     150.1.0.0/16 is variably subnetted, 2 subnets, 2 masks
O 150.1.0.0/16 is a summary, 00:00:16, Null0
R3(config-router)#red con me
R3(config-router)#red con metric?
metric metric-type

R3(config-router)#red con metric-type ?
  1 Set OSPF External Type 1 metrics
  2 Set OSPF External Type 2 metrics

R3(config-router)#red con metric-type 1 sub
R3(config-router)#
R3(config-router)#do show ip route ospf
     1.0.0.0/24 is subnetted, 4 subnets
O 1.1.24.0 [110/8694] via 1.1.34.4, 00:01:08, Serial0/0/0.34
     2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/4348] via 1.2.23.2, 00:01:08, FastEthernet0/0
     4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/4348] via 1.1.34.4, 00:01:08, Serial0/0/0.34
     150.1.0.0/16 is variably subnetted, 2 subnets, 2 masks
O 150.1.0.0/16 is a summary, 00:00:09, Null0
R3(config-router)#
rack11>4
[Resuming connection 4 to R4 ... ]

R4#
R4#show ip route ospf
     1.0.0.0/24 is subnetted, 4 subnets
O 1.2.23.0 [110/8694] via 1.1.34.3, 00:01:16, Serial0/0/0.34
O E1 1.1.23.0 [110/4367] via 1.1.34.3, 00:00:27, Serial0/0/0.34
     2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/8695] via 1.1.34.3, 00:01:16, Serial0/0/0.34
     3.0.0.0/32 is subnetted, 1 subnets
O E1 3.3.3.3 [110/4367] via 1.1.34.3, 00:00:27, Serial0/0/0.34
O E1 150.1.0.0/16 [110/4367] via 1.1.34.3, 00:00:27, Serial0/0/0.34
R4#

thanks,
Victor Cappuccio.-
Network Learning Inc - A Cisco Sponsored Organization (SO) YES! We take
Cisco Learning credits!
victor@ccbootcamp.com
http://www.ccbootcamp.com (Cisco Training and Rental Racks)
http://www.ccbootcamp.com/groupstudy.html (groupstudy member discounts!)
Voice: 702-968-5100
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-----Original Message-----
From: nobody@groupstudy.com on behalf of WorkerBee
Sent: Wed 4/25/2007 22:52
To: Cisco certification
Subject: OSPF LSA Type after Area Range and Summary Address

Hi Group,

I have this setup and I need to send summary routes from R3 150.1.0.0/16 and
161.1.0.0/16 towards BB3. Where *R3 is both ABR(area0)/ASBR(redistribute).

[R2] -- Area 51 -- [*R3] -- Area 51 -- [BB3]

Question : Is it always true that

 1) area range -> resulted in generating O IA summary prefix (make sense to
me)
 2) summary-address -> resulted in O E2 summary prefix (can it be changed?)

Is there a way to change summary-address 0 E2 -> O E1 summary prefix?

Rack1R3(config-router)#summary-address 150.1.0.0 255.255.0.0 ?
  not-advertise Do not advertise when translating OSPF type-7 LSA
  tag Set tag
  <cr>

[R3]

router ospf 1
 area 0 range 161.1.0.0 255.255.0.0
 summary-address 150.1.0.0 255.255.0.0

O 150.1.0.0/16 is a summary, 00:03:32, Null0
O 161.1.0.0/16 is a summary, 00:03:42, Null0

[R2]

O E2 150.1.0.0/16 [110/20] via 161.1.23.3, 00:04:59, Ethernet0
O IA 161.1.0.0/16 [110/74] via 161.1.23.3, 00:06:15, Ethernet0

[BB2]

O E2 150.1.0.0/16 [110/20] via 192.10.1.3, 00:05:42, Ethernet0
O IA 161.1.0.0/16 [110/74] via 192.10.1.3, 00:02:27, Ethernet0



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