OSPF Command question

Seifeddine-Tlili · ‎09-27-2009

Greeting,

Is there a difference between the network command and redistribute connected in OSPF i just notice that when i use redistribute connected (to advertize all my connected networks without using the network command) i don`t have the loadbalancing feature however when i issue the network command for at least one connected network i will see the redundant path on my ospf routing table.

To summurize:

Area 0 ==R1(area 1 NSSA) ========= R2 (Area 1 NSSA loop 172.16.1.0, 192.168.1.0)

When i type in R2

router ospf 1

log-adjacency-changes

area 3 nssa

redistribute connected metric 100 subnets

network 10.10.10.0 0.0.0.255 area 3

network 10.10.12.0 0.0.0.255 area 3

!

I can only see One path to my loop in R1

however when i issue these commands:

router ospf 1

log-adjacency-changes

area 3 nssa

redistribute connected metric 100 subnets

network 172.16.1.1 0.0.0.0 area 3

network 10.10.10.0 0.0.0.255 area 3

network 10.10.12.0 0.0.0.255 area 3

!

Now in R1 i can see two redundant path to my loopback

any explanation?

Thanks

Giuseppe Larosa · ‎09-27-2009

Hello Seifeddine,

there are difference between the two options and where possible I would recommend to use network area command.

Regarding your specific issue I would suggest you to post

sh ip ospf database external 172.16.1.0

sh ip route 172.16.1.0

on R1

Hope to help

Giuseppe

Seifeddine-Tlili · ‎09-28-2009

Hi Giuseppe

Thanks for your message, well my question is why with the network command i can get the two path for 172.16.1.0 and with the redistribute command i can`t.

Can you try to simulate this using dynamips

Thanks