OSPF Route Summarization

[1875936047]

Why did ISR1 ultimately learn 10.1.0.0/24 instead of 10.1.0.0/22?

[MHM Cisco World]

becuase you use area range with /24 mask 

MHM

[MHM Cisco World]

Remove area range and check your lab

MHM

[Devaa]

Hi @1875936047 

All good with your config. This is some bug with PacketTracer it seems.

No luck clearing OSPF in ISR1. 

You clear ospf process in R2 and wait for some time, it shows as expected. 

R2#clear ip ospf process 
Reset ALL OSPF processes? [no]: yes

R2#

ISR1#sh ip ro
O IA    10.1.0.0/24 [110/3] via 10.100.2.2, 00:00:38, GigabitEthernet0/1
O IA    10.10.0.0/22 [110/2] via 10.100.2.2, 00:23:53, GigabitEthernet0/1

ISR1#
ISR1#
21:55:10: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on GigabitEthernet0/1 from LOADING to FULL, Loading Done

ISR1#
ISR1#
ISR1#sh ip ro
O IA    10.1.0.0/22 [110/3] via 10.100.2.2, 00:04:09, GigabitEthernet0/1
O IA    10.10.0.0/22 [110/2] via 10.100.2.2, 00:28:09, GigabitEthernet0/1
ISR1#

In real or emulated routers (in GNS3 or EVE-NG), you won't observe such glitches. 

[1875936047]

god bless you and thank you

[Flavio Miranda]

@1875936047 

 You configured the area range towards area 1 but you need to configure towards area 0

Attaching a working file.

Dont forget to use the command "clear ip ospf process" after the change.

[1875936047]

I can't open your file

[Devaa]

All good with the config. No need of any config changes. This is some bug with PacketTracer it seems.

clear ospf process in R2 and wait for some time, it shows as expected.