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

[Lelio Fulgenzi]

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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