From: Bob Sinclair (bsin@cox.net)
Date: Thu Jul 01 2004 - 21:47:31 GMT-3
Jano,
There was a thread on this in the past few weeks. You might find some good
posts in the archives. The only difference is how OSPF handles the
forwarding address in type 5 LSAs. With a 0.0.0.0 mask, the ASBR will
always send its own address. With a network mask it can save a hop across a
multicaccess network by putting the route source address as the forwarding
address. There is also a good paper on this on the Netmasterclass.net site
under READiT.
HTH,
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: <jano@rhox.com.br>
To: <ccielab@groupstudy.com>
Sent: Thursday, July 01, 2004 8:34 PM
Subject: OSPF interface or OSPF network
> Hi,
>
> I came across this and don't know the answer... When you configure OSPF
> you have the option to configure the OSPF interface or the OSPF network,
> i.e.
>
> router ospf 1
> network 192.168.38.1 0.0.0.0 area 0
>
> OR
>
> router ospf 1
> network 192.168.38.0 0.0.0.255 area 0
>
> What is the difference?
>
> And if I have:
> int s0
> ip address 192.168.38.1 255.255.255.128
> int s1
> ip address 192.168.38.129 255.255.255.128
>
> Will the "network 192.168.38.0 0.0.0.255 area 0" command enable ospf on
> interfaces s0 and s1?
>
> Regards,
> Jano
>
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