Model 2314/2316 SNMP Alarm Encoder
Fial Incorporated
2314/2316-042315
41
It is desirable to enter the assigned hostname and IP address into your network’s DNS server, so that users
and SNMP managers can refer to the SNMP Alarm Encoder by hostname.domain instead of using IP
address. If you use DHCP for all address assignments, then create a permanent lease for the IP address
assigned to the SNMP encoder. You will need to know the SNMP Encoder's MAC address to create a
permanent lease. The unit's MAC address is shown on the web page IP Settings screen, and looks
something like this: 00:06:3B:00:27:8C
Once your DNS is set up properly, if your domain name is something like ‘yourDomain.com’ and your
hostname is something like ‘pikespeak’, you can then enter ‘telnet pikespeak.yourDomain.com’ or
‘http://pikespeak.yourDomain.com’ instead of remembering IP addresses for each unit.
Note that there is no ‘www’ in this URL (web address).
IP Address restrictions
The first and last IP address in the range defined by the netmask cannot and must not be used. Netmasks
are used to divide the 4 billion possible IP addresses into smaller groups or “zones.” This is called sub-
netting.
For example: Given a netmask of 255.255.255.0, IP address n.n.n.0 and n.n.n.255 cannot be used. The
first is the network address, and the last is the network broadcast address. Commonly used netmasks, for
Class-C and smaller zones, are shown in the following table.
Table 4. Table of Netmasks and Addresses
Netmask
Number of
Useable
Addresses
Number of
networks
Useable
addresses
per network
Addresses That Are Not Useable
255.255.255.0
254
1
254
n.n.n.0 n.n.n.255
255.255.255.128 126 2 126
n.n.n.0 n.n.n.127
n.n.n.128 n.n.n.255
255.255.255.192 62 4 62
n.n.n.0 n.n.n.63 n.n.n.64 n.n.n.127
n.n.n.128 n.n.n.191 n.n.n.192 n.n.n.255
255.255.255.224*
*see example
below
30 8 30
n.n.n.0 n.n.n.31 n.n.n.32 n.n.n.63
n.n.n.64 n.n.n.95 n.n.n.96 n.n.n.127
n.n.n.128 n.n.n.159 n.n.n.160 n.n.n.191
n.n.n.192 n.n.n.223 n.n.n.224 n.n.n.255
255.255.255.240 14 16 14
n.n.n.0 n.n.n.15 n.n.n.16 n.n.n.31
n.n.n.32 n.n.n.47 etc.
255.255.255.248 6 32 6
n.n.n.0 n.n.n.7 n.n.n.8 n.n.n.15
n.n.n.16 n.n.n.23 etc.
255.255.255.252 2 64 2
n.n.n.0 n.n.n.3 n.n.n.4 n.n.n.7
n.n.n.8 n.n.n.11 etc.
Summary of Contents for 2314
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