[cisco-voip] OT: using subnet/wildcard mask for group within a group, issues?

[Scott Voll]

I don't know if I follow all of it.....

But if you have host with a /26 with a /29 inside of of that network. the
larger SN devices will try to go directly to the smaller SN but the Smaller
SN will not be able to get  to the larger SN.

It would not be a design I would try in production.

YMMV.

Scott


On Thu, Feb 5, 2015 at 7:06 AM, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:

>
> This group is full of it. Knowledge, that is. So who better to ask these
> questions....
>
> I've got a subnet, say 192.168.45.0/26, of which I want to allow only a
> small group of that subnet to access a particular host. I'm able to reserve
> the top end, which falls into another subnet, 192.168.45.56/29.
>
> So, the first network, 192.168.45.0 has network id .0, first host .1, last
> host .62, b/cast .63
> And, the subgroup would be,  network id .56, first host .57, last host
> .62, b/cast .63
>
> I'm thinking, as long as I don't use 56 and 63, I can do this.
>
> The hosts I will be protecting will be voice gateways, and collaboration
> servers, e.g. callmanager, connection, etc.
>
> Would there be a time where the hosts being protected would interpret the
> incorrect broadcast address? I don't see how. But I could be missing
> something.
>
> Lelio
>
>
> ---
> Lelio Fulgenzi, B.A.
> Senior Analyst, Network Infrastructure
> Computing and Communications Services (CCS)
> University of Guelph
>
> 519‐824‐4120 Ext 56354
> lelio at uoguelph.ca
> www.uoguelph.ca/ccs
> Room 037, Animal Science and Nutrition Building
> Guelph, Ontario, N1G 2W1
>
>
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>
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