Thanks for all the replies - Much appreciated.

> From: [email protected]
> To: [email protected]
> Date: Wed, 4 Mar 2015 07:41:27 +1100
> Subject: [c-nsp] ospf (passive-interface default)
> 
> Hi Everyone,
> 
> Dont have a lab handy to test this, so hoping someone can answer:
> 
> If you configure:
> 
> router ospf 1
> network 10.10.10.0 0.0.0.3 area 1
> 
> without passive-int default, will ospf be "enabled" on all Interfaces, or 
> just the Interface with 10.10.10.0/30 configured on it?
> 
> I was always under the impression that (best practice) is to do the 
> following, so that ospf is disabled on all ints, apart from the ones 
> configured with "no passive int foo"
> 
> router ospf 1
> passive-int default
> no passive int gi0/1
> network 10.10.10.0 0.0.0.3 area 1
> 
> ...and,  (As an alternative) is configuring ospf under each interface now a 
> method many use instead of the above example?
> 
> ...I havent tried the "per int" method (I will later today), but in theory, I 
> think having all the config under "router ospf xx" would be easier to 
> maintain...i.e. all the config is in the one section for ospf?
> 
> Cheers.
> 
>                                         
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