[nsp] OSPF NSSA

[Paul Van Lierop]

Depending on the IOS version you are at you can use the command:
passive-interface default under OSPF so now you will only be enabling
OSPF on the interfaces that you specifically do a no passive-interface
[interface#] on.  Works very well to control specifically what gets
turned up.  Redistributing the connected interfaces also now makes them
external routes which is not ideal.

Paul Van Lierop

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Stephen J.
Wilcox
Sent: Wednesday, February 11, 2004 10:30 AM
To: Oliver Boehmer (oboehmer)
Cc: cisco-nsp at puck.nether.net
Subject: RE: [nsp] OSPF NSSA

> It is standard practice, and also best practice for any connected
> interface for this matter. You can always add a "passive-interface"
> statement if you don't want any neighbor relationships established
over
> the interface.  

Oliver, just as an aside.. whats the benefit of having these in the OSPF
rather 
than redistributed.. I guess my concern is for example on each PoP I
assign /30 
customer connections out of /24 blocks so I could easily add the /24 as
on ospf 
network, however it means I must remember to set each interface passive 
explicitly and I'm worried I'll forget and I dont want my customers to
get my 
ospf traffic...

Steve

> 
> > Previously I used to do redistribute connected to
> > inject the loopback IP address into OSPF. How is this
> > different from manually specifying the loopback IP
> > address as a member of the area?
> 
> As Andrew already mentioned: this prevents external LSAs from being
> generated. So depending on your topology this might or might not make
a
> difference. 
> 
> 	oli
> 
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