From: Gustavo Novais (gustavo.novais@novabase.pt)
Date: Thu Apr 26 2007 - 17:44:32 ART
Hi,
When I was studying for my CCIE, I also had that question. Although I
didn't find any documentation I tried some stuff. The conclusion that I
reached was that if you are redistributing as E1, the summary address
will be E1. But if you mix E1 and E2 summarized by the same summary
address command, E2 will win. You can always try to search GS archives
for those emails...
See http://www.groupstudy.com/archives/ccielab/200511/msg01405.html
...Or just try it for yourself. If you happen to find some documentation
on that, please post it here
HTH
Gustavo Novais
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Victor Cappuccio
Sent: quarta-feira, 25 de Abril de 2007 1:13
To: WorkerBee; Cisco certification
Subject: RE: OSPF LSA Type after Area Range and Summary Address
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
FAX: 702-446-8012
-----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
This archive was generated by hypermail 2.1.4 : Tue May 01 2007 - 08:28:38 ART