12-13-2008 05:12 AM - edited 03-04-2019 12:41 AM
(R1 fa0/0)<--->(fa0/0 R2 s 0/0)<--->(s0/0 R3 fa0/0)<--->(fa 0/0 R4)
R1 fa0/0 - 10.64.0.1
R2 fa 0/0 - 10.64.0.2
R2 s 0/0 - 10.2.1.2
R3 s 0/0 - 10.2.1.1
R3 fa 0/0 - 192.168.34.3
R4 fa 0/0 - 192.168.34.4
Routers R1,R2,R3 are in area 0
Router R4 is configured as ospf area 10.
R3 also configured as ospf area 10.
QUESTION: What should I do to make R4 see all routers in area 0?
Should I use redistribution?
Thank you!
12-13-2008 05:31 AM
There are several ways to accomplish this. Normally, each router would have a network statement or statements within its OSPF routing process that will match against the links you want within the OSPF domain. Then assuming area 10 is a "normal" area, area 0 routes will flow into it across the R3 ABR.
e.g.
R1
router ospf #
network 10.64.0.1 0.0.0.0 area 0
R2
router ospf #
network 10.64.0.2 0.0.0.0 area 0
network 10.2.1.2 0.0.0.0 area 0
R3
router ospf #
network 10.2.1.1 0.0.0.0 area 0
network 192.168.34.3 0.0.0.0 area 10
R4
router ospf #
network 192.168.34.4 0.0.0.0 area 10
12-13-2008 05:47 AM
Yes. It's helped me.
But why I cann't do this:
R3
router ospf 1
network 10.2.1.1 0.0.0.0 area 0
router ospf 2
network 192.168.34.3 0.0.0.0 area 10
If router R3 configured so, what should I do to make R4 see all router in area 0?
12-13-2008 06:07 AM
The problem is you're running two different OSPF processes. Try:
R3
router ospf 1
network 10.2.1.1 0.0.0.0 area 0
network 192.168.34.3 0.0.0.0 area 10
*or*
router ospf 2
network 10.2.1.1 0.0.0.0 area 0
network 192.168.34.3 0.0.0.0 area 10
When you run two different processes, R3 sees all information but it's not shared, by default, between processes. You could also do redistribution across the two processes (I think?), but using just one process would be what you would normally do.
12-13-2008 05:52 AM
Can I use some command that will show me, that
configured router is internal,backbone,ABR or ASBR?
12-13-2008 06:11 AM
I don't recall any command that you give you information noting such and such a router is an ABR, etc., although you can infer it from much of the show ospf information commands. Show ospf database would list type of LSA information being received from various routers.
12-13-2008 06:31 AM
And what about ospf procceses? Why I cann't use separtate procceses on ABR for connection areas?
12-13-2008 06:46 AM
u can use separate processes for ABR but not recomended
12-13-2008 06:33 AM
Make following changes
On R3
R3(config-router)area 10 stub
On R4
R4(config-router)area 10 stub
command to see ur ABR etc
show ip ospf border-routers
12-13-2008 06:50 AM
when I configure areas R3|R4 as stub with separated ospf processes
sh ip route - >
C 192.168.34.0/24 is directly connected, FastEthernet0/0
Router4#
12-13-2008 06:53 AM
can u post sh run for R3 & R4
12-20-2012 10:07 AM
What is difference between E1 & E2 route in ospf.
If i am put this command than show E1 Router.
Redistribute bgp 1000 metric 200 metric-type 1 subnets
O E1 10.14.1.0 [110/201] via 172.16.1.4, 00:00:25, FastEthernet1/0
If i am put this command than show E2 Router.
Redistribute bgp 1000 metric 200 metric-type 2 subnets
O E2 10.14.1.0 [110/200] via 172.16.1.4, 00:00:02, FastEthernet1/0
E1 calculate external + internal cost.
E2 Calculate only internal.
12-13-2008 07:04 AM
I have one else question:
what is difference between E1 and E2 OSPF types?
12-13-2008 07:41 AM
what is difference between E1 and E2 OSPF types?
http://www.thebryantadvantage.com/CCNPBSCIExamE2E1OSPFRoutes.htm
12-13-2008 10:40 AM
what is difference between E1 and E2 OSPF types?
OE1: This is determined by using the seed metric + the metric to reach the ASBR
OE2: This is determined by using the seed metric only
OE1 ri=outes are preffered over OE2 routes
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