outside of lab exercises, one might consider using /24's or other full
subnets for purposes of NAT pool addresses.

that's about all I can think of.

Chuck

""Walker, Jim""  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Your friend is right. Why would you use anything other than a /32 bit mask
> on a virtual interface?
> You are not going to route using the loopback address are you?
>
>
>
> Jim Walker
> Master Network Engineer
> Partners HealthCare System, Inc.
> Information Systems / Technical Services & Operations
> Tel. (617) 732-8803
> Fax (617) 264-5130
> This e-mail message and any attachments are confidential and may be
> privileged.  If you are not the intended recipient, please notify me
> immediately by replying to this message and please destroy all copies of
> this message and attachments.  Thank you.
>
>
>
> -----Original Message-----
> From: Joshua Dughi [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, January 17, 2002 3:23 PM
> To: [EMAIL PROTECTED]
> Subject: Loopback IP masking - 32 or 24 bits? or? [7:32345]
>
>
> Hi, all;
>
> I recently started considering why I might want to have a 32-bit mask
> for my loopbacks as opposed to some other scheme - for instance using
> the regularly documented 24-bit mask on a loopback.
>
> I am speaking of course, of:  Interface Loopback0
>                                                 IP Address 10.0.0.1
> 255.255.255.0
>
> versus approaching this matter in this fashion:
>
>                                           Interface Loopback0
>                                                 IP Address 10.0.0.1
> 255.255.255.255
>
> So, my questions are: 1)
>              Has any one here seen a detailed discussion of this matter?
> Can you provide me a link to it?
>
>        2) Based on what a friend of mine feels, his view is that there
> is never any benefit to having a 24-bit, or 28, or 29-bit mask on a
> loopback. In his view, loopbacks will always need to be, very logically,
> used with 32-bit masks.
>
> Can anyone please shed some light on this matter?
>
> Thank you.
>
> Joshua Dughi




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