I work at a hosting company (obviously not doing much networking) and the datacenter just gave us an IP block for one of our customers who has a machine in our rack there. When I assign the IPs to a machine, I am generally just told what IPs to assign, but no one is currently online, so I am trying to understand this a bit better.
The IP address block I need to add to the client's machine is 220.127.116.11/28
From what I have read, The usable IPs should be .113 - .125, making it 13 usable, reserving the first and last. When I look at how his other IP block is setup though, it is 18.104.22.168/29 but the usable IPs setup on his machine are .66 - .70, which looks like the first 2 are reserved (.64 and .65)?
Also, the subnet mask for the current IP block is 255.255.255.248 and the gateway is 22.214.171.124. Do these change from block to block or do they stay the same?