From: Peter Van Oene (vantech@xxxxxxxxxxxx)
Date: Tue Sep 14 1999 - 15:42:12 GMT-3
Hmm.. Anything to do with running a 0 subnet? Personally, I always
explicitly config my ospf int's for clarity..
Ie 192.168.1.1 0.0.0.0 area 0
Peter Van Oene
Senior Systems Engineer
UNIS LUMIN Inc.
www.unislumin.com
----- Original Message -----
From: Muralidhar Devarasetty <dhar_murali@hotmail.com>
To: <mark@detrick.com>; <jaarons@hotmail.com>; <scotto@iworksys.com>
Cc: <ccielab@groupstudy.com>
Sent: Tuesday, September 14, 1999 7:08 AM
Subject: Re: OSPF network; inverse mask question....
>
> Hi all,I have small problem in my office with this wildchard mask.I have
> some GSR with some L3 switches running ospf.When I configure network
> 192.16.38.0 0.0.0.3,then ospf is not running on my e0
int(192.16.38.1/30).If
> I change the wild card mask from 0.0.0.3 to 0.0.0.255 then it starts
> running.I confirmed it with sh ip ospf database.Now I am not facing any
> problem since all my int are running with ospf but I feel it is not
expected
> behav.. any idea?????
> Thanks
>
> ----Original Message Follows----
> From: "Mark S. Detrick" <mark@detrick.com>
> Reply-To: "Mark S. Detrick" <mark@detrick.com>
> To: "Jason Aarons" <jaarons@hotmail.com>, <scotto@iworksys.com>
> CC: <ccielab@groupstudy.com>
> Subject: Re: OSPF network; inverse mask question....
> Date: Sat, 14 Aug 1999 11:35:21 -0700
>
> Folks,
>
> Actually, inverse masks are not limited to the ones below. It is just
that
> the ones below are the most useful. For example, you could use 0.0.0.6,
> which makes the last bit an "I care" bit. The value of that bit is
dictated
> by the IP you place before it in the statement. In the case of 10.0.0.0,
> all IPs with EVEN numbers (even because the last bit of the last octet is
a
> 0 which implys even numbers) in the range 10.0.0.0 to 10.0.0.7.
>
> Indeed, not very useful but thought I would mention it just for the
> understanding of how it works. Any bit you make 0 in the mask uses the
> corresponding bit value from the IP octet to designate which IPs will be
> used in OSFP, for example. Any bit you make 1 is a don't care.
>
> My suggestion for the test is to use 0.0.0.0 and specify all the
interfaces
> you want specifically (there aren't that many). That way there is no
> confusion.
>
> Mark Detrick
> ----- Original Message -----
> From: Jason Aarons <jaarons@hotmail.com>
> To: <scotto@iworksys.com>
> Cc: <ccielab@groupstudy.com>
> Sent: Tuesday, August 10, 1999 5:29 PM
> Subject: Re: OSPF network; inverse mask question....
>
>
> > Actually I tried 0.0.0.252; it isn't a valid reverse valid wildcard
mask.
> >
> > Remember that OSPF uses a wildcard mask so the valid masks are below
> >
> > 255
> > 127
> > 63
> > 31
> > 15
> > 7
> > 3
> > 1
> > 0
> >
> >
> >
> > ----Original Message Follows----
> > From: "Scott O'Donnell" <scotto@iworksys.com>
> >
> >
> > >
> >
> > Or the Network statement could look like this.
> >
> > network 172.16.254.1 0.0.0.252 area 0
> >
> > Although it doesn't lend itself to easy reading.
> >
> > Scott
> >
> >
> >
> > > Try a wildcard mask of 0.0.0.3
> > >
> > > Antonio
> > > ---------------------- Forwarded by Antonio Sabella/USC/AXE on
> 08/10/99
> > 10:36
> > > AM ---------------------------
> > >
> > > nobody@groupstudy.com on 08/10/99 10:05:23 AM
> > > To: jaarons@hotmail.com@internet@WTAXE,
> > > ccielab@groupstudy.com@internet@WTAXE
> > > cc:
> > > Subject: Re: OSPF network; inverse mask question....
> > >
> > > Your wild card mask is not including s0..
> > >
> > > ----Original Message Follows----
> > > From: "Jason Aarons" <jaarons@hotmail.com>
> > > Reply-To: "Jason Aarons" <jaarons@hotmail.com>
> > > To: ccielab@groupstudy.com
> > > Subject: OSPF network; inverse mask question....
> > > Date: Wed, 04 Aug 1999 18:14:37 EDT
> > >
> > > interface Serial0
> > > ip address 172.16.254.1 255.255.255.252
> > > encapsulation frame-relay
> > > ip ospf network point-to-point
> > > !
> > > router ospf 1999
> > > network 172.16.254.0 0.0.0.252 area 0
> > > !
> > > ip classless
> > > ip subnet-zero
> > >
> > > 1#show ip ospf int s0
> > > Serial0 is up, line protocol is up
> > > OSPF not enabled on this interface
> > >
> > > if I change the router ospf 1999, network 172.16.254.0 0.0.0.255 it
> > works.
> > > What am I not seeing ?
> > >
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