From: Bill Hill (bhill@xxxxxxxxxx)
Date: Wed Jan 02 2002 - 12:47:27 GMT-3
Here is the specific bug-id you are looking for.
http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCdm75819+&Submit
=Search
-----Original Message-----
From: Study CCIE [mailto:studyccie@hotmail.com]
Sent: Wednesday, January 02, 2002 10:33 AM
To: ccielab@groupstudy.com; Jim Brown
Subject: Re: Simple OSPF question
There is an issue with using the 0.0.0.0 mask, but it's version dependent.
Let's say you have:
netA--R1--netB--R2--netC--R3--netD
eigrp--R1--eigrp--R2--ospf--R3--ospf
R2 does mutual redistribution
R3 does not see netB
Some ios versions won't redistribute netB regardless of whether you have
0.0.0.0 or 0.0.0.255. Newer ios versions (all 12.2 and some 12.1 I believe,
correct me if I'm wrong) will redistribute netB regardless. Personally, I
always use the 0.0.0.0 mask and redistribute connected into OSPF just to be
safe.
----- Original Message -----
From: "Jim Brown" <Jim.Brown@CaseLogic.com>
To: "'Study CCIE'" <studyccie@hotmail.com>; <ccielab@groupstudy.com>
Sent: Wednesday, January 02, 2002 9:26 AM
Subject: RE: Simple OSPF question
> I thought I have heard of some mention about an issue with redistribution
> when using the all 0's mask. I always use a wildcard mask to match the
> network, but that's just me.
>
> -----Original Message-----
> From: Study CCIE [mailto:studyccie@hotmail.com]
> Sent: Wednesday, January 02, 2002 8:16 AM
> To: ccielab@groupstudy.com
> Subject: Re: Simple OSPF question
>
>
> (Sorry if this posting comes up twice)
>
> Glenn,
>
> The preferred method for a single interface is '137.20.20.1 0.0.0.0 area
x'
> like you said. Let's say you have a lot of interfaces that fall in the
same
> range though. For example, 137.20.20.0/30 137.20.20.4/30 137.20.20.8/30
> 137.20.20.12/30 ... 137.20.20.252/30
>
> Instead of a network statement for every interface at 137.20.20.1 0.0.0.0
a
> x, you can use a single statement 'network 137.20.20.0 0.0.0.255 area x'
>
> Remember, in IGP, the network statement doesn't mean 'what networks will I
> advertise'. It means, 'what interfaces will participate in this protocol'
> In BGP however, the network statement does mean 'what networks will I
> advertise'
>
> Hope this helps
>
> ----- Original Message -----
> From: "Williams, Glenn" <WILLIAMSG@PANASONIC.COM>
> To: <ccielab@groupstudy.com>
> Sent: Wednesday, January 02, 2002 8:51 AM
> Subject: Simple OSPF question
>
>
> > Hi,
> >
> > Usually when I enable ospf on an interface, for example if the
> > interface
> is
> > 137.20.20.1/24, I would say:
> >
> > net 137.20.20.1 0.0.0.0 area x
> >
> > I could say:
> >
> > net 137.20.20.0 0.0.0.255 area x
> >
> > but what would I gain?
> >
> > Just one of those questions I've been meaning to ask.
> >
> > GW
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