Is Public IP Subnet has reserved Network Address and Broadcast Address

[radhakrishnan.mathiyalagan]

In our DC we have ASA 5525 Firewall, while logging into ASDM and under the routes tab i have seen directly connected network 115.110.162.144 255.255.255 so there are 8 IPs starting from 115.110.162.144 to 115.110.162.151, This is Public IP addresses so I want to understand whether the first IP 115.110.162.144 is reserved as Network address and last ip 115.110.162.151 is reserved as broadcast address and we can only assign ip from 115.110.162.145 to 115.110.162.150 to the router and firewall interfaces????

Kindly help me understand subnets works for Public ip addresses, if so First and last IPs are reserved or not

[MHM Cisco World]

You correct, there is two IP reserve for broadcast and for net ID for any subnet in broadcast domain. 

[MHM Cisco World]

You correct, there is two IP reserve for broadcast and for net ID for any subnet in broadcast domain. 

[balaji.bandi]

255.255.255   - depends on last octet we missing your post if this is /29 yes your assumption is correct

[radhakrishnan.mathiyalagan]

Is if we purchase one public IP from IANA to get assigned to WAN interface of the router. They will provide 3 IPs- 1 for Network address, 1 for assigning to WAN interface and 1 for broadcast address 

[balaji.bandi]

I think you are mixing 2 things here. not sure what is your question here..

are you looking for subnettting - there are plenty document over google how they subnet.

smallest subnet any provider will be used /30 - that is subnet mask of 255.255.255.252 - that will have 4 IP address

1 network

1 for ISP side

1 for your network

1 broadcast.

I am not sure latest IANA/APNIC Polcies - last i was they only allocate /24 (may be your provider can assign for you using IANA form).

[paul driver]

Hello

your IANA subnet allowcation = 115.110.162.144/29

So....

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@radhakrishnan.mathiyalagan wrote:

I want to understand whether the first IP 115.110.162.144 is reserved as Network address

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YES

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@radhakrishnan.mathiyalagan wrote:

ast ip 115.110.162.151 is reserved as broadcast address

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Yes

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@radhakrishnan.mathiyalagan wrote:

we can only assign ip from 115.110.162.145 to 115.110.162.150 t

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Yes