OSPF DR/BDR relationship & Neighbor State
OSPF DR-BDR Relationship
Neighbor states
we will do some lab here
We configure the router , we set the console and we start with the interfaces
This is what we did
Conf t
Int loop 0
Ip address 1.1.1.1 255.255.255.255
(32 bits network)
Exit
Int loop 90
Description EIGRP Network
Ip address 10.90.0.1 255.255.255.0
(24 bit mask)
Exit
Int serial 0/0
Ip address 10.12.0.1 255.255.255.0
No shutdown
Exit
Create a routing process
Router ospf 1
Network 1.1.1.1 0.0.0.0 area 0
(we are putting the loopback in area 0)
Network 10.12.0.1 0.0.0.0 area 1
(we are putting the serial interface in area 1)
Redistribute eigrp 7 subnet metric-type1
(we are redistributing
EIGRP with autonomous system 7 and subnets , because we are bring
subnets as well , and we are changing the default metric type (2) , so we are
using metric type 1 so the metric can grow in propagate in the ospf network)
Exit
Create a routing process for EIGRP autonomous system #7
Router eigrp 7
Network 10.90.0.1 0.0.0.0
End
We need to use the wild mask of 0.0.0.0 because it’s a class A and
it can use all the ip address starting
with 10 and make it part of the EIGRP
__________________________________________________________
Router 2
Conf t
Int serial 0/0
Ip address 10.2.0.2 255.255.255.0
No shut down
Router ospf 2 (Router process don’t
need to match)
Network 10.12.0.0
0.0.0.255 area 1
End
We could see that out neighbor network is included..
We can see in #show ip int brief that it's up
But in GNS3 is not showing up..It should be something like this:
it show that it's connected to area 1 with ip address 10.12.0.2 with ospf process #2
Another interesting command is show ip ospf
It shows that the algorithmic was executed one time, no authentication and the number of interfaces in the area (1)
We can turn on ospf debug on R2
this is the result of show ip ospf
We will create a loopback 3 with a 32 bits mask in R1
Look at the result in R2
If we do serial s2/1, this is what we will see..
adjacent neighbor: it's the router ID, because it's the highest one..
Hello dead and wait has to match
it shows the serial 2/1
We could see here that it's a point to point network
adjacent neighbor: it's the router ID, because it's the highest one..
Hello dead and wait has to match
it shows the serial 2/1
We could see here that it's a point to point network
OSPF DR/BDR relationship & Neighbor State
Reviewed by ohhhvictor
on
11:56 AM
Rating:
Reviewed by ohhhvictor
on
11:56 AM
Rating:
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