From: kym blair (kymblair@xxxxxxxxxxx)
Date: Sat Jun 29 2002 - 18:53:22 GMT-3
Ahmed,
network 10.1.128.1 0.0.0.0 area x
or
network 10.1.128.0 0.0.0.255 area x
Either way is acceptable, but as Guy suggests, it is best to tightly control
your ospf interfaces so you are not distributing routing updates on non-ospf
interfaces:
network 10.1.128.1 0.0.0.0 area x
passive-interface default
HTH, Kym
>From: "Lupi, Guy" <Guy.Lupi@eurekaggn.com>
>Reply-To: "Lupi, Guy" <Guy.Lupi@eurekaggn.com>
>To: "'Ahmed Al-Ghawas'" <ghawas@batelco.com.bh>, ccielab@groupstudy.com
>Subject: RE: OSPF wildcard bits
>Date: Sat, 29 Jun 2002 16:24:43 -0400
>
>I don't know that you should be too concerned about how they want you to do
>it because I don't think they have a "preferred method", but definitely
>understand how the command works. I don't think they would be overly
>concerned that you added in the whole range on the lab, unless they told
>you
>to be as specific as possible with your network statements. I would just
>pick one method and stay with it. In practice, in order to avoid problems
>when people enter the wrong network statement wildcard mask, I prefer to
>use
>"passive-interface default". This forces each interface on which you want
>to run OSPF to be specifically stated in the configuration.
>
>Guy
>
>~-----Original Message-----
>~From: Ahmed Al-Ghawas [mailto:ghawas@batelco.com.bh]
>~Sent: Saturday, June 29, 2002 3:37 PM
>~To: ccielab@groupstudy.com
>~Subject: OSPF wildcard bits
>~
>~
>~Guys,
>~
>~I am really getting confused!
>~
>~From what I understood from "CCIE Practical Studies" book that
>~when using the
>~network command, that you ought to be precise in the extent
>~that you would add
>~the interface ip address and not advertise the whole subnet mask!
>~
>~For example:
>~
>~R1
>~S0:10.1.128.1/24
>~|
>~|
>~S0:10.1.128.2/24
>~R2
>~S1:10.1.80.1/24
>~|
>~|
>~S1:10.1.80.3/24
>~R3
>~
>~R1 config:
>~router ospf 2001
>~network 10.1.128.1 0.0.0.0 area x (and not; network 10.1.128.0
>~0.0.0.255 area
>~x!!)
>~
>~R2 config:
>~router ospf 2001
>~network 10.1.128.2 0.0.0.0 area x (and not; network 10.1.128.0
>~0.0.0.255 area
>~x!!)
>~network 10.1.80.1 0.0.0.0 area x (and not; network 10.1.80.0
>~0.0.0.255 area
>~x!!)
>~
>~R3 config:
>~router ospf 2001
>~network 10.1.80.3 0.0.0.0 area x (and not; network 10.1.80.0
>~0.0.0.255 area
>~x!!)
>~
>~I really need to stick to one concept and understand why this
>~book doest it
>~differently then the other and avoid loosing marks for such
>~stupid thing in
>~the real lab!!
>~
>~Any input is much appreciated
>~
>~Ahmed
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