cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

Community Helping Community

219
Views
0
Helpful
1
Replies
Highlighted
Beginner

ip ospf network command

Hello Everyone,

When do we use the following ospf commands?

I've been working within GNS and it seems that ospf automatically recognizes, based on the media type, what the network type should be..

So, I don't understand why these commands exist?

1) Broadcast (Cisco Extension)

2) non-Broadcast (RFC-compliant mode)

3) Point-to-multipoint (RFC-compliant mode)

4) point-to-multipoint non-broadcast (Cisco extension)

5) POint-to-point (Cisco extension)

Do they exist more for a Frame Relay purpose

Everyone's tags (6)
1 ACCEPTED SOLUTION

Accepted Solutions
Advisor

ip ospf network command

Hi,

they exist to change the default network type that the device configured on the interface, for example:

-loopbacks are treated as stubs so they are advertised with a /32 by default and if you want to override this then change the network type

-you have 2 routers connected via an ethernet link so change the network type to be point-to-point as here you don't need any DR/BDR

-you have a frame-relay config with devices having different but compatible network types but the adjacency doesn't come up because of different hello/dead timers then either change the network type to modify these timers or change the hello/dead to be equal.

I'm sure that you'll find other usages for these network types.

Regards

Alain

Don't forget to rate helpful posts.

Don't forget to rate helpful posts.

View solution in original post

1 REPLY 1
Advisor

ip ospf network command

Hi,

they exist to change the default network type that the device configured on the interface, for example:

-loopbacks are treated as stubs so they are advertised with a /32 by default and if you want to override this then change the network type

-you have 2 routers connected via an ethernet link so change the network type to be point-to-point as here you don't need any DR/BDR

-you have a frame-relay config with devices having different but compatible network types but the adjacency doesn't come up because of different hello/dead timers then either change the network type to modify these timers or change the hello/dead to be equal.

I'm sure that you'll find other usages for these network types.

Regards

Alain

Don't forget to rate helpful posts.

Don't forget to rate helpful posts.

View solution in original post

CreatePlease to create content
Content for Community-Ad
FusionCharts will render here