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Quick question on OSPF and route summarization
- mrpringles
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18 years 2 months ago #17281
by mrpringles
Quick question on OSPF and route summarization was created by mrpringles
Hi people i just need to clarify some stuff on ospf and route summarization
Scenario:
I have Router A which is the main router that is connected to 4 other Routers namely Router B, C, D and E. Since they are all in the same OSPF area 0, it shouldnt be a problem summarizing all 4 different subnets into one on Router A rite?
Therefore, i was wondering if this command would work:
Router A(config-router)# network 192.168.1.0 0.0.0.15 area 0
Basically, i used a subnet mask of /30 for each serial connection so i would have 192.168.1.0, 192.168.1.4, 192.168.1.8 and 192.168.1.12. By using the above command, does it summarize all 4 networks into one? Or is it advisable to specify 4 commands for each respective serial link? Please advise.
Scenario:
I have Router A which is the main router that is connected to 4 other Routers namely Router B, C, D and E. Since they are all in the same OSPF area 0, it shouldnt be a problem summarizing all 4 different subnets into one on Router A rite?
Therefore, i was wondering if this command would work:
Router A(config-router)# network 192.168.1.0 0.0.0.15 area 0
Basically, i used a subnet mask of /30 for each serial connection so i would have 192.168.1.0, 192.168.1.4, 192.168.1.8 and 192.168.1.12. By using the above command, does it summarize all 4 networks into one? Or is it advisable to specify 4 commands for each respective serial link? Please advise.
18 years 2 months ago #17325
by Dove
Dove
Replied by Dove on topic Re: Quick question on OSPF and route summarization
what I understood is you had give the below subnetwor to all the routers serial interfaces respectively. if its correct then
Yep, It will work but you gotta give this command in all the 4 routers. so there is no sense to use this wildcard
It will be helpful if you wanna route more then one sub-network from a router then you can use like this. That is if you want to route aall the 4 sub-network what you have mentioned in a single routing command then this statment
will help you.
Hope I answered to your query.
Yep, It will work but you gotta give this command in all the 4 routers. so there is no sense to use this wildcard
It will be helpful if you wanna route more then one sub-network from a router then you can use like this. That is if you want to route aall the 4 sub-network what you have mentioned in a single routing command then this statment
Router A(config-router)# network 192.168.1.0 0.0.0.15 area 0
will help you.
Hope I answered to your query.
Dove
- mrpringles
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18 years 2 months ago #17326
by mrpringles
Replied by mrpringles on topic Re: Quick question on OSPF and route summarization
Hi Dove,
thanks for your reply. What you are saying is if i were to use the command :
Router A(config-router)# network 192.168.1.0 0.0.0.15 area 0
Then all my other routers are required to use the above command as well???
But if i were to use the following commands :
Router A(config-router)# network 192.168.1.0 0.0.0.3 area 0
Router A(config-router)# network 192.168.1.4 0.0.0.3 area 0
Router A(config-router)# network 192.168.1.8 0.0.0.3 area 0
Router A(config-router)# network 192.168.1.12 0.0.0.3 area 0
This would mean that configurations on other routers would be required to enter the subnet for only its own serial interface?
Thanks in advance!
thanks for your reply. What you are saying is if i were to use the command :
Router A(config-router)# network 192.168.1.0 0.0.0.15 area 0
Then all my other routers are required to use the above command as well???
But if i were to use the following commands :
Router A(config-router)# network 192.168.1.0 0.0.0.3 area 0
Router A(config-router)# network 192.168.1.4 0.0.0.3 area 0
Router A(config-router)# network 192.168.1.8 0.0.0.3 area 0
Router A(config-router)# network 192.168.1.12 0.0.0.3 area 0
This would mean that configurations on other routers would be required to enter the subnet for only its own serial interface?
Thanks in advance!
18 years 2 months ago #17329
by Dove
Dove
Replied by Dove on topic Re: Quick question on OSPF and route summarization
what I mean to say is you can use, its not a mandatory.
Exact command is this one only based on the subnet what you had given on serial interface.
Exact command is this one only based on the subnet what you had given on serial interface.
Router A(config-router)# network 192.168.1.0 0.0.0.3 area 0
Dove
18 years 2 months ago #17353
by S0lo
I tried something similar. It works, but I had to issue the same command on other routers too.
Studying CCNP...
Ammar Muqaddas
Forum Moderator
www.firewall.cx
Replied by S0lo on topic Re: Quick question on OSPF and route summarization
Router A(config-router)# network 192.168.1.0 0.0.0.15 area 0
I tried something similar. It works, but I had to issue the same command on other routers too.
Studying CCNP...
Ammar Muqaddas
Forum Moderator
www.firewall.cx
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